SpiderBot Delta 3D Printer

Cleaning PEI bed

posted in Tips and tricks
Thursday, May 22 2014, 02:05 PM
To clean PEI Bed I usually use a paper towel impregnated with aceton on PEI Bed and I put former aluminium bed over it to prevent rapid vaporisation. 30 min later I just clean melted ABS with a clean paper towel! Seems fine!

BUT : Today My PEI bed craqued (photo TBD)!

Maybe because of my aceton process, need to investigate !

Will post later to tell about this issue!!

Benoit from France!!
    Responses (6)
    • Accepted Answer

      Friday, May 23 2014, 11:03 AM - #permalink
      It cracked?! Owh no. :(

      Why such an elaborate cleaning method. I just do a quick wipe with paper dipped in a little bit of alcohol. Seems to be working fine...
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    • Accepted Answer

      Friday, June 06 2014, 01:38 PM - #permalink
      Hi All,
      After some investigations, my PEI bed cracked because of mechanical stress (in fact strain, for mechanicians) the part was too perfectly glued onto bed!.

      No issue for aceton, the PEI is only "prone to stress cracking in chlorinated solvents".

      My cleaning method was used to be able to unglue printed part, the cold water process can only be used just after printing, when the machine has cooled it is useless.

      In fact my bed temperature was too high (110°C) now with 90°C the part is less glued!
      Hi from France!

      benoit aka pichereau
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    • Accepted Answer

      okpail
      okpail
      Offline
      Saturday, June 14 2014, 02:59 PM - #permalink
      Hi Benoit

      A thought reading your post:

      Maybe reheating the bed to 90 degrees and then using the water method works?

      kind regards,

      Onno
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    • Accepted Answer

      Monday, June 16 2014, 10:50 AM - #permalink
      Hej Benoit,

      i never used anything else than alcohol for cleaning.
      To take off printed objects, i always wait some minutes for the bed to cool down, then i use a butchers knife to tear the object from the bed, starting at some corner, giving it just a careful lifting, the rest follows suite... If you didn't wait long enough, you experience a slight bed deformation, telling you to wait some more minutes. My printing end codes starts the central fan in order to cool the chamber, if i am present, i also open the door.

      Happy printing,
      Knut
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    • Accepted Answer

      Wednesday, June 18 2014, 08:19 AM - #permalink
      Hi all, and thank you for your answers!

      Just bought a new PEI bed (quite expensive but soooooo convenient!)

      After All, two mistakes you can avoid:
      Don't overheat bed (max 105°C), if your part is hard to remove (low height and thin walls).
      If unmounted don't push on your bed if it is on flat surface, the screw heads on the perimeter make your bed bend inward and that make it crack!

      Now, I let the PEI bed rely on heating plate and try slowly to "peel" my part off with a flat blade.


      Still Loving my Spiderbot

      Benoit from France
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    • Accepted Answer

      Wednesday, June 18 2014, 12:15 PM - #permalink
      Hej ProfBen,

      concerning the PEI Bed bending, i solved that in a different and unprofessionel, but very convenient way - see
      the last reply in
      http://www.spiderbot.eu/forum/another-hazzle-pei-bed-bending-up.html

      Bye
      Knut
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