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I'm building a larger format printer with a heated bed. The bed size will be 1080 x 1080 mm. It will be mounted on a 40 x 40 mm aluminum T-slot frame. I was thinking of using an Aluminium Precision Tooling Plate something like 5083. I'm not sure what thickness I should go for. I was thinking 10 mm but maybe I should go up to 12 mm to avoid warping at higher temps? I've seen some manufacturers go up to 16 mm but isn't that overkill perhaps? Does it seem like it's a balance between heating times and warping?

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Warping is caused by a heat differential within the aluminium. Not really dependent on it's thickness. If it's heated uniformly it will expand uniformly. So I assume manufacturers are suiting their aluminium plates to their heating systems.

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  • $\begingroup$ Ok i see. Thats good to know then. We were intending to use (9) separate heaters to heat only the area of the bed that would be used for each print assuming different print sizing's. So now im wondering if thats such a good idea? $\endgroup$
    – Aqua1
    Apr 21, 2022 at 12:23
  • $\begingroup$ I don't know, logically it seems a risky idea. What if you had you aluminium in 9 sections? I'm assuming you're going to put a sheet of glass or something down to actually print on. $\endgroup$
    – Kilisi
    Apr 21, 2022 at 22:35
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    $\begingroup$ Hi, thanks so much for taking the time to answer. We are a Hackerspace and its a group project, but nobody is proficient on larger heatbeds. The idea to have aluminium in smaller sections is interesting. Im not sure where to source the borocillicate glass 1m x 1m.?The biggest i can find is 500. We are in Australia. $\endgroup$
    – Aqua1
    Apr 22, 2022 at 3:07
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    $\begingroup$ Hi Kilisi, ah i see haha.....yes well thats a small size. I think now maybe the reason for the larger thickness (16mm) is to lessen any warpage effect from heating in different areas...ie the center only for smaller prints. We can cover the aluminium with stick on 0.2mm PEI sheets and join them carefully. We,ve managed to build the printer ok and use Duet to run it. The bed is stationary. So far so good. Thanks for the input. $\endgroup$
    – Aqua1
    Apr 22, 2022 at 13:01
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    $\begingroup$ Take care in Samoa. $\endgroup$
    – Aqua1
    Apr 22, 2022 at 13:01

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