Fabtotum 4th axis/feeder support

by imarin, published

Fabtotum 4th axis/feeder support by imarin Jan 29, 2015
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This is a support to attach the 4th axis of the FABtotum on top of the structure to make feeder tests. It provides:

  • a shorter bowden tube from feeder to head.
  • a slightly more stable structure than having it with adhesive tape (see fotos).
  • full permanent access to the "feeder engage button".

It is based on the published STEP files imported in FreeCAD.
The source is available.


It is designed to accomodate a M6 nut/bolt pair. But it might not be "mandatory" (it provides stability).

There are two versions. One open (with slot to insert the nut) and one closed. I printed the closed one and managed to put the 0.5 mm M6 nut inside through the 0.3 mm wide slot, by flexing a little bit the walls of the slot. I printed it in PLA without support. If this is not fine for you, you have the open one (or nevertheless you have the FreeCAD files to tweek it to your taste).

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However, if you are going to use it, do not put it where the photo shows it. Though I will never know it for sure, I think my flex cable (the one that goes to the head) broke internally (no apparent external damage) due to a repetitive contact (not shock or tear or trap, just contact during printing) due to the mechanical oscillating movement in the cable caused by the movements of the print head.

Love it Imarin. Keep up the R&D.