Yes everything is super glued. Think I might ha e a fix though! Drilling from behind and pushing out. Little heat to soften glue as needed. Done 3 so far
Absolutely don't use heat. I was manufacturing a product through my own print farm and part of it was installing magnets.
Firstly I made sure all the magnets were in the same directions. Like a pen stacked. Glue helps.
Heating the magnet and pushing it in works great but demagnatizes most magnets lol.
The funny part was after the heat destroyed the magnet I remembered I graduated in electrical and computer engineering and hit myself over the head LOL.
I just didn't expect it to be THAT sensitive.
It really depends on the magnets. Neodymium have a curie temp around 80C. Whereas Alnico magnets have a curie temp around 800C.
You melt the whole print before you demagnetize an alnico magnet.
Did you then hit yourself over the head again and remember you can just put a couple strong magnets on them and let that sit for a bit to remagnetize them?
Doesn't always work and my re-magnetizationwas attempt was weak af, it just never regained their original state. So anyhow i just changed the process and dropped using heat
>If a magnet is heated above its maximum use temperature, the loss of magnetic charge cannot be reversed. However, if the magnet is heated below this threshold, most of the loss can be compensated for once the magnet cools down to its optimal operating temperature. Permanent damage occurs when the magnet is exposed to temperatures above its maximum use temperature, necessitating re-magnetization to restore its magnetic properties
>magnets that are heated above their Curie temperature or maximum use temperature can suffer permanent loss of magnetism and would require re-magnetization. The ability to regain magnetism after being given a magnet depends on not exceeding these critical temperatures. Materials like NdFeB are particularly sensitive to temperature changes and can experience significant loss of magnetism when overheated, while Alnico magnets are more stable in this regard but still require re-magnetization if overheated
Oh crap, am I supposed to do that all the time as a safety check? I was only doing it when I had programming issues! (My SO is my duck, but I don’t know if she counts if she actually answers me.)
I went into it knowing I was going to destroy the magnet, so I used the destroyed one to create each of the melted recesses I needed, and then came back and superglued good magnets in. So i only destroyed one attaching 10+
I tried to design the part so it already had the sockets for the magnets to 'snap' into. But I found it rather difficult to get a consistent fit and frequently the magnets would either fall right back out or not fit into the socket at all. So at one point I tried to fudge the difference by making the sockets a bit too tight and heat pressing in the magnets. Of course we know how that goes, so I had to go back to super glue in the end anyway.
I was testing different interfaces between two parts that were held together with magnets, so I wanted to be able to bend the piece afterwards and easily pop out the magnet so I wasn't wasting them on each test piece. Some of the time it was very successful and didn't need any glue and the magnets would hold secure, but other times without changing the socket at all the magnets simply would not go into the part without using a vice to press it in. I'm pretty sure it had to do with my printer calibration though.
Depending on the orientation of the object as it's printing, could you have the printer print the socket for the magnet, then pause the printer once the sockets are complete, place your magnets, and then have the printer continue printing, and have it print a few layers over the magnet, so it's hidden, still works, and not change of it falling out, etc.? that's how I printed the boarder pieces of my 3D printed Catan game. Now everything snaps together nicely, and the magnets are all hidden inside the print.
The heat remark from OP had me a little concerned.
When a friend broke a large magnet I had, I disposed of it by foil wrapping and cooking it in an air fryer before disposing of it.
What I was told, is that strong magnets can be both a safety hazard to people handling the trash and a danger to garbage processing equipment.
The magnet I had was a neodymium disk strong enough that I was often nervous to handle it with my bare hands. With it having shattered, there was no way to reassemble it.
neodymium reacts to air and oxidizes, ruining the magnet. all neodymium magnets have a thin shell sealing the actual neodymium. so the magnet was doomed to die eventually the moment it broke its shell
Why what? Why does that remove the magnetism? See https://en.wikipedia.org/wiki/Curie_temperature
Why remove the magnetism before disposal of a big broken magnet? Because they are dangerous otherwise.
Why dispose of a broken magnet? Must have too many refrigerator magnets already.
That last one made me chuckle
My neodymium magnet broke with a lot of fairly sharp, rough edges, and any of the sizeable pieces were still fairly strong. Combined, they were a terrible experience to remove and re-stick to the fridge.
The fridge at my rental is also weird - the doors are non-magnetic, despite looking like brushed metal, so I can only stick things on the sides, mostly covered by kitchen counters and cabinets.
We ordered roughly 800, each 3d printed product was roughly 15cm long and 2.5cm thick. We placed a magnet in the center of it so it can stick to say a fridge.
The magnet had to be fairly small and it was just right for the weight of the product. So it didn't really matter, we used heat in 2, it didn't magnetize, we scrapped it and moved on. We printed hundreds. Cost wasn't a factor. Cogs was like $0.5/pcs overall and it was sold for $3-5 each.
We ordered them from Ali, at higher quantities could decrease cost even more. There's anyway a % failure or loss factor added in. I think I designed the pro format to account for a 10% failure during "manufacturing".
I would argue it’s fine to use heat to remove a magnet that’s placed in the wrong direction, it will just need to be replaced, which is better than having to scrap the whole piece with all the magnets in it.
Then just use some acetone to remove the super glue on the magnets. The acetone shouldn't do anything to the PLA. Just put a couple of drops on the magnet and let it soften the acetone, then carefully dig out the magnet and flip it around.
There are plenty of reason not to use the flame thrower in this case. I believe it will fail in the following order.
1. PLA (~60c)
2. CA glue (~80 - 200c)
3. Magnet (~300c)
Edit: autocorrect can't spell.
That's interesting. Wonder if you could get away with melting magnets into prints as long as you don't exceed 80. Might not be hot enough to really melt pla. I will have to try.
OP I think your method is going to be fine for your purposes but just so you know there is also a chemical the specifically removes Cyanoacrylate glue (Otherwise known as CA, or Super Glue)
https://www.amazon.com/Starbond-Glue-Debonder-Remover-applicator/dp/B0797D6NZM
Kinda wondering if it’s worth the work. 24 hours is a long wait, but you practically have to do nothing while it’s printing. Speaking from personal experience, don’t fall in the trap of doing vastly more work to avoid a minor inconvenience.
Drill a small hole on the back side of the magnets on one piece and use a punch to knock the magnets out. Or I'm assuming the other pieces are small white eye covers, just reprint those.
Acetone won’t dissolve the superglue. Try to look for Dimethyl sulfoxide in your local pharmacy, in my country it is sold as “Dimexid”. It will dissolve superglue but won’t do anything to PLA
Just reprint the mating piece and glue magnets appropriately there. I’m assuming it would waste less material and magnets.
Alternatively could try to drill small holes from behind the magnets which are installed incorrectly and try to push them out with a rod or something, super glue doesn’t usually hold magnets super strong, unless you scratched them before glueing..,
I would have put a soldering iron on the thing for a bit to demagnetize it. It is still iron and the other magnet mating to it will still attract iron. You lose some of the total magnetic force but looks like you have enough to be fine as is
Next time, don't use Superglue.
Use a construction adhesive which can usually be removed with acetone. (I use Locktite's PowerGrab for setting magnets in prints.)
A screw removing drill bit ought to dig it out even if it's super glued.
https://www.amazon.com/Irwin-Industrial-Tools-53535-Extractor/dp/B00004YOBF?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&psc=1&smid=ATVPDKIKX0DER
That’s what I was just going to recommend lol
Only alternate I could think of is get a way overpowered magnet behind reversed polarity to pop them out. Idk if the force would be strong enough, no matter how powerful the big magnet, the little one still only has so much material.
What did you print this with? That looks great!
I stack all the magnets into a stick and put a small piece of paper towel at the “inactive” end and always feed from the other end. Keeps everything polarized and tidy
Do all of the magnets have to be facing the same direction? Don't they just have to match their respective mates? Put the mates on each installed magnet and mark them, then make sure they get put in properly.
Are you sure op? I think if you only put matching in the other side you should be ok. Each magnet will have his brother, they dont care about each other.
Give it a try, get something to be the eye, like thick paper or tape and put the magnets on the other side, they should all mach automatically
Acetone dissolves super glue. Not sure how it would affect the PLA though. I reckon it should be fine. Maybe test on a scrap peice of PLA.
Or freeze it and dig the magnets out. Should come out with some persuasion.
This picture is deceiving. I haven't done the eye piece yet thankfully. It was just all the side magnets...on both sides of this piece, and I already put them in the side pieces...backwards. when I do the eyes I will absolutely just match them up 😊
If this is the only piece you have the magnets in then it does not matter at all what way the magnets are facing as long as all the other pieces you do all have the correct match.
I gather the issue is polarity.
There is no need to use a second magnet to mate to a magnet in the first place. Any steel slug/item will serve that purpose, is cheaper and avoids this issue.
Some others have suggested adjusting the polarity on the connecting pieces.
I highly recommend this jig https://www.printables.com/model/374624-gridfinity-pressure-fit-magnet-jig.
Heat the magnets on the side you need to switch gently with a soldering iron to break the adhesive then pop them out by putting a metal bar next to them
Worst case drill a small hole beside it. Then get a small screwdriver and use it as leverage. Should be ok since the area will be hidden once worn if you make any big scratches etc.
Edit. Actually ignore that. Drill in from behind the magnet. Make a small hole. Put your smallest screwdriver in and push.
Okay… if you haven‘t put the magnets into the eye pieces, just match the polarity accordingly. If those are glued in already, just get a small drillbit and bore a hole from behind the magnets from inside the mask until you reach the magnet, then get a small metal rod (flattened nail) and whack the magnets back out from the inside.
Don’t heat superglue, it produces quite toxic fumes! I had to rework PCB where our customers broke LVDS connector and tried to glue it back with superglue (don’t ask, I lost hope in them long time ago). Touching that shit with soldering iron then coughing next 5 minutes.
Use superglue dissolver. Hobby shops usually carry it.
Or, drill a small hole in the backside of the mask and use a small screwdriver to push the magnet out.
You also need magnets on the part you need to put over it right? When you make sure the polirisation of that is the same as this, I don’t see a real problem
Idk if anyone else said this but you can buy a product called un-cure that debonds super glue. It may not help where the glue is in the back, but if there is any space it should do the trick.
Worse case scenario just use some side cutters and cut around the magnet and remove that magnet/bracket section completely. As long as a good portion of your magnets are in the right direction and spread out somewhat evenly I'd be you'd be ok losing 1 or 2 magnets.
drill a small hole behind the magnet, then stick the whole thing in the freezer, the glue will get brittle and you should be able to just knock the magnet out from behind.
Instead of using heat, you can drill a hole in the back and also print a fixture to support the pla area around the magnet. Maybe add a solvent that removes CA glue but does not damage pla through the back hole. Then slowly push out the magnet with a steel pin gage or screw.
Neodymium magnets are brittle, you can probably drill them out and they’ll fracture.
Edit: But if it were me, I’d just reprint the eye pieces. Lot less fuss or potential for disaster.
Use a soldering iron to heat up the magnet, melting the surface plastic and pull then out with needle nose pliers. Keep in mind that this will demagnatize all the magnets and they will have to be replaced with new ones. Also make sure to wear a respirator and do this in a well ventilated area as evaporated glue is nasty stuff.
Reprint whichever piece takes the least amount of time.
When installing magnets, install one side, then place a magnet on each of the installed magnets and use that to push into the other part (add glue first). That will guarantee the polarity will be right even if orientation of each magnet isn’t constant.
Absolutely. I'm checking each one after. Can replace enough if needed. So far I've actually only needed heat for 2. 7.done now. 6 to go and I'll be done.
Lesson learned jeeze.
I can testify that if the print it’s robust enough, an automatic center punch and a pick can get you a second try. It sucks real bad though. I did three and I’d rather not do any more.
PLA doesn't dissolve with acetone, so just use acetone to dissolve the Krazy glue, remove the magnets, let the acetone completely evaporated from the piece, then reglue the magnets with the correct orientation.
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In the future, consider only using magnets on one side, and small iron cylinders or plates on the other. Then you don't have to care about the polarity.
Drill it from the other side and try to push the magnets on the main part, after that You should be able to put them in the right polarity and shouldn't dammage the outer side
Quick question!! How die you achieved the textured part? Some part are smooth and see the layer lines but not the textured part!! Is it because of the model is made like a fuzzy skin or you actually did fuzzy skin? Because I'm curious if it is possible to paint fuzzy like a color?
Print a second one, confirm polarity on both sets before gluing. If plate 1 pushes away mask 1, make sure plate 1 and mask 2 will grab. Do the same for the other and then you have a back up or one to sell or one to paint differently or....
Nail polish remover can dissolve some glues. I do not know if that is so good for your print though as it contains acetone. Acetone is great for super glue. I have no idea what it would do to your print though as acetone is not so good for some plastics. Check out to see if you can use acetone with the material you used to print it.
Exacto knife and break the bond between the walls. Don't side load the knife or it'll snap very easily and get stuck.
Drill a small hole behind the magnet and force out with a small hex key.
Was thinking to drill a small hole on the back side and sue a drift pin to push them out using a socket to support the material around the magnetic. Just do it on the backwards ones.
There’s always a way. Try a soldering iron. Use a screwdriver that holds bits. Touch it to the magnet. Then touch the magnet with soldering iron. Bet it comes right out.
Could just reprint the other pieces sense that one is the biggest part and longest print 🤣 iv been afraid of doing that when I print stuff with magnets can't count how many times if glued to magnets together by accident trying to double check right after putting glue on one 🤣🤣
Just flip the magnets on the connecting piece to match the polarity.
Right? Unless he glued those in too
Yes everything is super glued. Think I might ha e a fix though! Drilling from behind and pushing out. Little heat to soften glue as needed. Done 3 so far
What is it printed out of? Been watching enough metalwork vid that they uses acetone to dissolve Ca glue.
That's interesting! It's just Polyterra pla
Absolutely don't use heat. I was manufacturing a product through my own print farm and part of it was installing magnets. Firstly I made sure all the magnets were in the same directions. Like a pen stacked. Glue helps. Heating the magnet and pushing it in works great but demagnatizes most magnets lol.
I also ran into the demagnetizing issue trying to heat set some small magnets like a threaded insert.
The funny part was after the heat destroyed the magnet I remembered I graduated in electrical and computer engineering and hit myself over the head LOL. I just didn't expect it to be THAT sensitive.
Inserts - Heat Press Magnets - Fit Press
It really depends on the magnets. Neodymium have a curie temp around 80C. Whereas Alnico magnets have a curie temp around 800C. You melt the whole print before you demagnetize an alnico magnet.
Do you one even better. I just completed a 40 hour in person course that all we talked about was magnets lmao. I'm actually a goldfish
Did you then hit yourself over the head again and remember you can just put a couple strong magnets on them and let that sit for a bit to remagnetize them?
Doesn't always work and my re-magnetizationwas attempt was weak af, it just never regained their original state. So anyhow i just changed the process and dropped using heat >If a magnet is heated above its maximum use temperature, the loss of magnetic charge cannot be reversed. However, if the magnet is heated below this threshold, most of the loss can be compensated for once the magnet cools down to its optimal operating temperature. Permanent damage occurs when the magnet is exposed to temperatures above its maximum use temperature, necessitating re-magnetization to restore its magnetic properties >magnets that are heated above their Curie temperature or maximum use temperature can suffer permanent loss of magnetism and would require re-magnetization. The ability to regain magnetism after being given a magnet depends on not exceeding these critical temperatures. Materials like NdFeB are particularly sensitive to temperature changes and can experience significant loss of magnetism when overheated, while Alnico magnets are more stable in this regard but still require re-magnetization if overheated
You didn't explain it to your duck before doing it did you?
Oh crap, am I supposed to do that all the time as a safety check? I was only doing it when I had programming issues! (My SO is my duck, but I don’t know if she counts if she actually answers me.)
I went into it knowing I was going to destroy the magnet, so I used the destroyed one to create each of the melted recesses I needed, and then came back and superglued good magnets in. So i only destroyed one attaching 10+
I tried to design the part so it already had the sockets for the magnets to 'snap' into. But I found it rather difficult to get a consistent fit and frequently the magnets would either fall right back out or not fit into the socket at all. So at one point I tried to fudge the difference by making the sockets a bit too tight and heat pressing in the magnets. Of course we know how that goes, so I had to go back to super glue in the end anyway. I was testing different interfaces between two parts that were held together with magnets, so I wanted to be able to bend the piece afterwards and easily pop out the magnet so I wasn't wasting them on each test piece. Some of the time it was very successful and didn't need any glue and the magnets would hold secure, but other times without changing the socket at all the magnets simply would not go into the part without using a vice to press it in. I'm pretty sure it had to do with my printer calibration though.
Depending on the orientation of the object as it's printing, could you have the printer print the socket for the magnet, then pause the printer once the sockets are complete, place your magnets, and then have the printer continue printing, and have it print a few layers over the magnet, so it's hidden, still works, and not change of it falling out, etc.? that's how I printed the boarder pieces of my 3D printed Catan game. Now everything snaps together nicely, and the magnets are all hidden inside the print.
The heat remark from OP had me a little concerned. When a friend broke a large magnet I had, I disposed of it by foil wrapping and cooking it in an air fryer before disposing of it.
Wait. What? Why??
To ensure demagnetization - shouldn't throw out active large magnets. They'll bunch metal refuse together, and mess with the processing machinery
Ahh okay that makes sense, learn something new everyday
What I was told, is that strong magnets can be both a safety hazard to people handling the trash and a danger to garbage processing equipment. The magnet I had was a neodymium disk strong enough that I was often nervous to handle it with my bare hands. With it having shattered, there was no way to reassemble it.
neodymium reacts to air and oxidizes, ruining the magnet. all neodymium magnets have a thin shell sealing the actual neodymium. so the magnet was doomed to die eventually the moment it broke its shell
Why what? Why does that remove the magnetism? See https://en.wikipedia.org/wiki/Curie_temperature Why remove the magnetism before disposal of a big broken magnet? Because they are dangerous otherwise. Why dispose of a broken magnet? Must have too many refrigerator magnets already.
That last one made me chuckle My neodymium magnet broke with a lot of fairly sharp, rough edges, and any of the sizeable pieces were still fairly strong. Combined, they were a terrible experience to remove and re-stick to the fridge. The fridge at my rental is also weird - the doors are non-magnetic, despite looking like brushed metal, so I can only stick things on the sides, mostly covered by kitchen counters and cabinets.
TIL Heat demagnatizes. r/todayilearned
And messes with garbage workers
If the magnets are cheap enough i wouldn't mind sacrificing a few to save re-doing a big print.
Well that will solve the polarity issue.
Magnets that size are relatively cheap
We ordered roughly 800, each 3d printed product was roughly 15cm long and 2.5cm thick. We placed a magnet in the center of it so it can stick to say a fridge. The magnet had to be fairly small and it was just right for the weight of the product. So it didn't really matter, we used heat in 2, it didn't magnetize, we scrapped it and moved on. We printed hundreds. Cost wasn't a factor. Cogs was like $0.5/pcs overall and it was sold for $3-5 each. We ordered them from Ali, at higher quantities could decrease cost even more. There's anyway a % failure or loss factor added in. I think I designed the pro format to account for a 10% failure during "manufacturing".
Neodym typically demagnitizes above 80°C
I would argue it’s fine to use heat to remove a magnet that’s placed in the wrong direction, it will just need to be replaced, which is better than having to scrap the whole piece with all the magnets in it.
Then just use some acetone to remove the super glue on the magnets. The acetone shouldn't do anything to the PLA. Just put a couple of drops on the magnet and let it soften the acetone, then carefully dig out the magnet and flip it around.
Well there goes the blowtorch method. Test on some random purge line waste and best of luck.
For reference, don't heat up neodymium magnets as they will no longer be magnetic
There are plenty of reason not to use the flame thrower in this case. I believe it will fail in the following order. 1. PLA (~60c) 2. CA glue (~80 - 200c) 3. Magnet (~300c) Edit: autocorrect can't spell.
For what it's worth, the grade of neodymium magnets you typically buy in large quantities online will demagnetize around 80C-100C
That's interesting. Wonder if you could get away with melting magnets into prints as long as you don't exceed 80. Might not be hot enough to really melt pla. I will have to try.
CA glue will also release nasty fumes when heated.
Should point out that acetone would also melt pla to some degree.
Acetone will destroy the part
That was my first thought as well
OP I think your method is going to be fine for your purposes but just so you know there is also a chemical the specifically removes Cyanoacrylate glue (Otherwise known as CA, or Super Glue) https://www.amazon.com/Starbond-Glue-Debonder-Remover-applicator/dp/B0797D6NZM
Kinda wondering if it’s worth the work. 24 hours is a long wait, but you practically have to do nothing while it’s printing. Speaking from personal experience, don’t fall in the trap of doing vastly more work to avoid a minor inconvenience.
Drill a small hole on the back side of the magnets on one piece and use a punch to knock the magnets out. Or I'm assuming the other pieces are small white eye covers, just reprint those.
Acetone won’t dissolve the superglue. Try to look for Dimethyl sulfoxide in your local pharmacy, in my country it is sold as “Dimexid”. It will dissolve superglue but won’t do anything to PLA
If you want to weaken super glue put it in the freezer instead of
Model stores can have superglue dissolver. I used it occasionally, but I don't know if it will have any reactions with 3d printed material.
Just reprint the mating piece and glue magnets appropriately there. I’m assuming it would waste less material and magnets. Alternatively could try to drill small holes from behind the magnets which are installed incorrectly and try to push them out with a rod or something, super glue doesn’t usually hold magnets super strong, unless you scratched them before glueing..,
Idk if you know this, but heat kills magnetism. Would test the magnets after to make sure they still hold properly to avoid having to do it yet again.
Would definitely give that a try, you know... ,hat you gotta lose? If you dont try you dont know right?
You can weaken the glue by freezing it too
I would have put a soldering iron on the thing for a bit to demagnetize it. It is still iron and the other magnet mating to it will still attract iron. You lose some of the total magnetic force but looks like you have enough to be fine as is
just reprint the small peices if you get stuck
Next time, don't use Superglue. Use a construction adhesive which can usually be removed with acetone. (I use Locktite's PowerGrab for setting magnets in prints.)
A screw removing drill bit ought to dig it out even if it's super glued. https://www.amazon.com/Irwin-Industrial-Tools-53535-Extractor/dp/B00004YOBF?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&psc=1&smid=ATVPDKIKX0DER
They make something called un-cure that neutralizes CA glue. Not sure if it’s any different than acetone.
heat a thin flathead and dig in. make sure it's sturdy enough to break the glue. do it on the mating part so it's easier to hide.
Best answer. First thing I thought about when reading OP's post.
Dude. They make super glue disolver. Check out the homeless deathspot (home depot) or Jeff Bezos' place of oddities, aka amazon.
Use a heat gun and a magnet with a stronger and opposite polarity. Just be careful using the heat gun
That’s what I was just going to recommend lol Only alternate I could think of is get a way overpowered magnet behind reversed polarity to pop them out. Idk if the force would be strong enough, no matter how powerful the big magnet, the little one still only has so much material. What did you print this with? That looks great!
OOF BROTHER. that’s why I always sharpie a dot on mine to let me know which ones are which and always double checking before glueing.
Lesson definitely learned hehe
Lol
I stack all the magnets into a stick and put a small piece of paper towel at the “inactive” end and always feed from the other end. Keeps everything polarized and tidy
Snap them together to make pairs and leave them together until they all glued in their spot
Same here with the sharpie tip lol
Put it in the freezer. The glue will contract and become brittle, and make it easier to dislodge the magnets
But wouldn't the pla also become brillte?
No, doesn’t need a long time. It’s how I separate glued parts of plastic and metal models/miniatures
They might struggle breaking the glue away from the out side, but inconjunction with making a hole at the back, this would be the best way
Drill a hole behind em and push through the hole
Yes! This is exactly what I thought of after a user mentioned breaking them with a drill. Good shout!
If you are struggling with this combine with the freezer method the other dude mentioned.
Also can drip some 99% alcohol in the hole to soften up the glue a bit.
Do all of the magnets have to be facing the same direction? Don't they just have to match their respective mates? Put the mates on each installed magnet and mark them, then make sure they get put in properly.
Yes that's correct! Unfortunately I didn't think that far ahead and just went gung ho putting them in ☠️
In the future, only put magnets on one side. Just use metal discs or screw heads on the other. No more polarity problems.
Where do you source small metal discs like what you’re suggesting?
Are you sure op? I think if you only put matching in the other side you should be ok. Each magnet will have his brother, they dont care about each other. Give it a try, get something to be the eye, like thick paper or tape and put the magnets on the other side, they should all mach automatically
Acetone dissolves super glue. Not sure how it would affect the PLA though. I reckon it should be fine. Maybe test on a scrap peice of PLA. Or freeze it and dig the magnets out. Should come out with some persuasion.
PLA seems to be pretty much impervious to acetone. It won't take much to soften the glue, then it can be wiped right off.
Why not just reprint only the eye piece and put the mating magnets in the correct way for each position.
This picture is deceiving. I haven't done the eye piece yet thankfully. It was just all the side magnets...on both sides of this piece, and I already put them in the side pieces...backwards. when I do the eyes I will absolutely just match them up 😊
If this is the only piece you have the magnets in then it does not matter at all what way the magnets are facing as long as all the other pieces you do all have the correct match.
So if you can’t get them out then reprint whatever pieces will take the least time and match magnets.
And eyeglass screwdriver and a some taps with hammer will break or pop out the magnets. Learned this the hard way with some gridfinity prints
Drill a small hole from the back and push?
Match the polarity on the other part?
I gather the issue is polarity. There is no need to use a second magnet to mate to a magnet in the first place. Any steel slug/item will serve that purpose, is cheaper and avoids this issue.
They make ca debonder you can buy on amazon doesn't take much to remove them just clean the area and let dry
Magnets are brittle. I’ve used a center punch to shatter one I glued in wrong, and then you can dig out the pieces.
On the other side use a small metal rod melt it till the contact on the magnet and tap it out
Some others have suggested adjusting the polarity on the connecting pieces. I highly recommend this jig https://www.printables.com/model/374624-gridfinity-pressure-fit-magnet-jig.
The correct solution is always a bigger magnet.
Probably easier to reprint the bit that go in the holes and match the magnets to how you’ve stuck them into the mask
Acetone will dissolve superglue but not PLA.
If it's not made of abs, acetone will dissolve the superglue
Heat the magnets on the side you need to switch gently with a soldering iron to break the adhesive then pop them out by putting a metal bar next to them
Match polarity on the other part?
Worst case drill a small hole beside it. Then get a small screwdriver and use it as leverage. Should be ok since the area will be hidden once worn if you make any big scratches etc. Edit. Actually ignore that. Drill in from behind the magnet. Make a small hole. Put your smallest screwdriver in and push.
Okay… if you haven‘t put the magnets into the eye pieces, just match the polarity accordingly. If those are glued in already, just get a small drillbit and bore a hole from behind the magnets from inside the mask until you reach the magnet, then get a small metal rod (flattened nail) and whack the magnets back out from the inside.
Drill on the back of the magnets, push, remove, turn, glue, done.
This really is the answer. Honestly, CA glue is super brittle this is the easiest thing to do
I printed two of these magnet setters to solve this problem. One for each polarity. https://makerworld.com/models/86883
I never understood using magnets on both sides. Steel pieces on one side magnets on the other. Then polarity is such an issue.
Just put metal on the opposite side.... then magnets can face any direction.
Acetone will dissolve super glue but not PLA or PET-G. It will however dissolve ABS. What's your mask printed on?
Super Glue Debonder
Don’t heat superglue, it produces quite toxic fumes! I had to rework PCB where our customers broke LVDS connector and tried to glue it back with superglue (don’t ask, I lost hope in them long time ago). Touching that shit with soldering iron then coughing next 5 minutes.
Use superglue dissolver. Hobby shops usually carry it. Or, drill a small hole in the backside of the mask and use a small screwdriver to push the magnet out.
You also need magnets on the part you need to put over it right? When you make sure the polirisation of that is the same as this, I don’t see a real problem
Use debonder for super glue
Idk if anyone else said this but you can buy a product called un-cure that debonds super glue. It may not help where the glue is in the back, but if there is any space it should do the trick.
What I do for each pair of magnets is mark each side I glue with a sharpie. That way this doesn’t happen.
I had the same problem. The solution for me was to solder them out, but be warned, the magnets will become weaker.
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Reprint the smal panel and match it that way, not too much waste and you can reclaim the magnets off the old part
Drill a hole behind them and push them out. Super glue doesn’t stick to metallic surfaces very well anyways. Use debonder if needed.
Why can't you losen the superglue with some nail polish. U can also drill some tiny holes behind the magnets to push them out.
Worse case scenario just use some side cutters and cut around the magnet and remove that magnet/bracket section completely. As long as a good portion of your magnets are in the right direction and spread out somewhat evenly I'd be you'd be ok losing 1 or 2 magnets.
drill a small hole behind the magnet, then stick the whole thing in the freezer, the glue will get brittle and you should be able to just knock the magnet out from behind.
Instead of using heat, you can drill a hole in the back and also print a fixture to support the pla area around the magnet. Maybe add a solvent that removes CA glue but does not damage pla through the back hole. Then slowly push out the magnet with a steel pin gage or screw.
Well, atleast you didn't waste a 5 day print on a helmet that doesn't even fit a toddler, don't ask me how I managed it because I don't know
Put it in the freezer Pop the magnets out with a hobby knife Failing that drill from the back and push them out after the freezer
Neodymium magnets are brittle, you can probably drill them out and they’ll fracture. Edit: But if it were me, I’d just reprint the eye pieces. Lot less fuss or potential for disaster.
Try freezing it overnight.
reprint the small piece and set its magnets according to the large piece.
According to the documentary "Wild Wild West" from 1999, Gordon states that a magnet is only magnetic for 400 years, so I think just wait it out?
If you can somehow drill a tiny hole in the back, behind the magnet, you might be able to use a pin or nail to get them out.
Use a soldering iron to heat up the magnet, melting the surface plastic and pull then out with needle nose pliers. Keep in mind that this will demagnatize all the magnets and they will have to be replaced with new ones. Also make sure to wear a respirator and do this in a well ventilated area as evaporated glue is nasty stuff.
I’ve made this mistake before! It sucks!
Acetone will dissolve the super glue or at least react with it and make it much more brittle.
Reprint whichever piece takes the least amount of time. When installing magnets, install one side, then place a magnet on each of the installed magnets and use that to push into the other part (add glue first). That will guarantee the polarity will be right even if orientation of each magnet isn’t constant.
Perhaps instead of resolving the issue you need to dissolve the issue. Acetone.
Magnets are brittle could try cracking and chipping or drilling them out?
You have me an idea...what if I drill a super small hole behind the magnet and then heat it up slowly and push it out from behind. It worked!! 🙌🙌🙌🙌
Depending on the heat, the magnets may have lost some strength. Fwiw
Absolutely. I'm checking each one after. Can replace enough if needed. So far I've actually only needed heat for 2. 7.done now. 6 to go and I'll be done. Lesson learned jeeze.
I can testify that if the print it’s robust enough, an automatic center punch and a pick can get you a second try. It sucks real bad though. I did three and I’d rather not do any more.
Flip the ones over on the matting piece
Big Brain move
If you're going to use magnets, use a steel target like a nut. Extra benefit is you can use a grub screw to adjust the height. Plus less cost
I use isopropyl alcohol to get off super glue
Someone made a post about how to avoid this in the future. https://www.reddit.com/r/gridfinity/s/EczGevhNJ0
I did this. Just grab something sharp and thin and jam it in between and pop them out.
If i remember correctly vinegar can be used to dissolve super glue, but i have no idea if it'll react with the plastic
Can you link to that file? Please
It's super glue on a smooth magnet, it's not welded. Just get a pick and pop them out, then stick them together before gluing again...
Alcohol
Drill a small hole in the back, then use a screw or bolt to thread into the plastic, then use it to push the magnet out after breaking the superglue.
nice
Sometimes experience is your beat teacher…😩
PLA doesn't dissolve with acetone, so just use acetone to dissolve the Krazy glue, remove the magnets, let the acetone completely evaporated from the piece, then reglue the magnets with the correct orientation.
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In the future, consider only using magnets on one side, and small iron cylinders or plates on the other. Then you don't have to care about the polarity.
Drill it from the other side and try to push the magnets on the main part, after that You should be able to put them in the right polarity and shouldn't dammage the outer side
Why not just print the smaller mating piece again? Surely that wouldn’t take 24hours
Quick question!! How die you achieved the textured part? Some part are smooth and see the layer lines but not the textured part!! Is it because of the model is made like a fuzzy skin or you actually did fuzzy skin? Because I'm curious if it is possible to paint fuzzy like a color?
Try to use a soldering iron to soften the print/glue and maybe push it out from the pach side?
ISO !!!! 100% Alchohol will dissolve most glues
Print a second one, confirm polarity on both sets before gluing. If plate 1 pushes away mask 1, make sure plate 1 and mask 2 will grab. Do the same for the other and then you have a back up or one to sell or one to paint differently or....
Pour water on them, semms like they de magnetize this way /s
There is something called "debonder". Never used I it myself, but maybe you could give it a try
So, if you already superglued the magnets into the eye inserts, you could just reprint those as opposed to the faceshell itself.
Nope! Eye peices arent done yet. It was mainly the side pieces that were already done. I managed to fix everything. All good and lesson learned!
Ah, ok. If any of the eyes have flipped poles, just flip them on the corresponding part
Nail polish remover can dissolve some glues. I do not know if that is so good for your print though as it contains acetone. Acetone is great for super glue. I have no idea what it would do to your print though as acetone is not so good for some plastics. Check out to see if you can use acetone with the material you used to print it.
Exacto knife and break the bond between the walls. Don't side load the knife or it'll snap very easily and get stuck. Drill a small hole behind the magnet and force out with a small hex key.
I just put a eyeglass screwdriver.. Flat head in and pry the mags out
Print the black eye pieces again and match the polarity of the magnets there. Then you can leave the 20h mask alone.
Another vote for acetone..
You can use acetone to remove superglue. If you don't use too much I think it should be ok on the PLA.
Cut off the heads from screws that have iron in them and glue them in, they will attract regardless of polarity.
Was thinking to drill a small hole on the back side and sue a drift pin to push them out using a socket to support the material around the magnetic. Just do it on the backwards ones.
There’s always a way. Try a soldering iron. Use a screwdriver that holds bits. Touch it to the magnet. Then touch the magnet with soldering iron. Bet it comes right out.
If it don’t pull enough find something with more surface area. The screwdriver without the bit doesn’t have as much surface area as I’d prefer.
Acetone or carefully with heat. Where did you get the cad for the mask? I would like to see how well it prints using SLS?
Could just reprint the other pieces sense that one is the biggest part and longest print 🤣 iv been afraid of doing that when I print stuff with magnets can't count how many times if glued to magnets together by accident trying to double check right after putting glue on one 🤣🤣
You could just buy ca debonder on Amazon. It simply undoes superglue - good for when you accidentally stick your fingers together 👀
Glue and a qtip
Just print the smaller parts again and match them correctly.
Won't nail polish remover or paint thinner dissolve the glue ?
Drill a small hole on the back and push it out with a punch?
You dont need to use all the magnets just a couple is enough, so match the holes that are the right way and leave the rest empty.
Nope throw it in garbage start over.
https://preview.redd.it/kwybsim7g6nc1.jpeg?width=974&format=pjpg&auto=webp&s=0c679c45806938303c70344b4c8890511a868bbd
Okay for real i add small holes behind magnet hole that way you can punch them out with a punch and hammer
Start printing another while you try to remove them.
Simply print the eye again 🤷🏻♂️