To springsteel or not to springsteel? Removeable heated bed
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@Nxt-1 no idea if the shape of the bed would make any difference, tried only square ones but the abs is able the crease the steel bed easily
...dunno about magnets, I have "fridge magnet" like mat on ender5 (it came with it) and printer some hours so far with 110C bed and the mat is still as magnetic as it was the first day (glass on top of magnet) .. I was expecting it to be damaged (lose magnetic properties) after the first print but it didn't after first, second third... it's not an old printer, has less than 100 hours under its belt but still almost 100 hours at 110C and it's still magnetic
.. dunno how time affects this (tbh I believed it will either lose magnetic properties on high temp or not, didn't think time plays any role here) -
@Nxt-1 said in To springsteel or not to springsteel? Removeable heated bed:
Loss of magnetic flux due to high bed temperatures.
There are magnetic sheets that are specified for high temperature (100C+).
Low hold strength, partially due to rather thick bed stackup.
If you use those adhesive magnetic sheets above the aluminum bed, the bed thickness doesn't really matter.
I am using this stack and am very happy with it. I need to remove the top and flex only for large objects. Most of the time I just scarp it gently.
Insulation (comes with its own adhesive)
Silicon heater
3M
6mm tooling aluminum
3M
magnetic sheet
steel plate
3M
1mm PEI.Edit: this is the insulation I am using https://www.aliexpress.com/item/32878669055.html?spm=a2g0s.9042311.0.0.27424c4dKwyD8W if your bed is larger you cut cover it with multiple pieces. Easy to cut and apply.
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I started looking at a local-ish store that specializes in magnets. The offer ferrite magnets that should hold up to a working temperature of 230°C, which is more than enough. I must admit I do not know whether the (spring)steel holds its ability to be attracted by magnets at high temperatures or it's just the magnets that are the potential issue.
@zapta Thanks for the insulation link, I am quite interested in that. It's cheap as well.
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@Nxt-1 said in To springsteel or not to springsteel? Removeable heated bed:
I must admit I do not know whether the (spring)steel holds its ability to be attracted by magnets at high temperatures or it's just the magnets that are the potential issue.
just magnets
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Whambam for example have magnetic sheets that can sustain 150c. Do you plan to print with higher bed temperatures?
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I'm using a flexible magnetic bed, made out of normal steel (0.5mm or 0.75mm, I don't remember; I can check if you want), and it works great. You don't need to bend it @180° to remove parts, so no worry to permanently deform it.
I'm using it for more than a year, now, and no problem.
Frédéric
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@zapta said in To springsteel or not to springsteel? Removeable heated bed:
Whambam for example have magnetic sheets that can sustain 150c. Do you plan to print with higher bed temperatures?
I have seen quite a bit about Whambams in other groups but I find them quite expensive and they largest they offer is still to small for what I need.
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@fma said in To springsteel or not to springsteel? Removeable heated bed:
I'm using a flexible magnetic bed, made out of normal steel (0.5mm or 0.75mm, I don't remember; I can check if you want), and it works great. You don't need to bend it @180° to remove parts, so no worry to permanently deform it.
I'm using it for more than a year, now, and no problem.
Very interesting, do you feel the steel holds its shape well after bending? Also, do you know what grade of steel you are using?
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@Nxt-1 said in To springsteel or not to springsteel? Removeable heated bed:
Very interesting, do you feel the steel holds its shape well after bending? Also, do you know what grade of steel you are using?
Yes, the steel sheet remains perfectly flat once on the magnetic bed. But as said, I don't bend it much.
I don't know what grade it is; I bought it in a big DIY store: I think it is very basic steel!
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@fma said in To springsteel or not to springsteel? Removeable heated bed:
@Nxt-1 said in To springsteel or not to springsteel? Removeable heated bed:
Very interesting, do you feel the steel holds its shape well after bending? Also, do you know what grade of steel you are using?
Yes, the steel sheet remains perfectly flat once on the magnetic bed. But as said, I don't bend it much.
I don't know what grade it is; I bought it in a big DIY store: I think it is very basic steel!
Must be something in the likes of feritic stainless, otherwise I'd expect rusting, no?
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Yes, it is galvanized... But it is not a special steel.
