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New z-Motor-Holder for the Velleman K8200 or 3Drag

by mstolt, published

New z-Motor-Holder for the Velleman K8200 or 3Drag by mstolt Sep 24, 2013
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Summary

The original holder for the z-Axis-Stepper-Motor is a plain aluminium bracket. This bracket let the motor move a bit in z-Axis direction. This movement causes wiggles on the z-Axis of printed objects, because some layers gets compressed and others expanded a bit.

With the new motor holder these wiggles are gone :)

The original inspiration came from a post from "edirol" in the Velleman support forum. Thanks to him. I redesigned it in openSCAD because i wanted to use M3 nuts and bolts to assemble to two parts.

You need

  • 4 times M3x12mm screws and 4 times M3 washer to mount the motor
  • 4 times M3x20mm screws and 4 times M3 nut to assemble the two pieces together
  • 2 additional M5x12mm screws and 2 square nuts to bolt the assembly to the printer frame.

More details on assembly and the used nuts and bolts can be found inside the openSCAD file.

update: I added a shorter version to react on the comment. This has a 12mm shorter baseplate and should work for the original heat bed configuration. Thanks for the remark on this.

Print long and prosper.

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Great design and a huge boost in performance for my K8200 setup - thanks mate!

i have to add, that you really should print this solid. did it with 40% infill and it was not stiff enough. reprinting it now.

so this mount ONLY works if you have a mirror mounted? I don't, so then i wont be able too use this?

Hi, i am sorry for the late reply, but currently i do not have a regular internet access.
There are two version of the backplane in the project. A longer version (works great with a mounted mirror) and a shorter one that should work without a mirror.

Hello Matthias,
in Ebay under http://www.ebay.de/itm/3d-drucker-Neue-Z-Motor-Halter-fur-den-Velleman-K8200-oder-cnc-/171301708829?pt=Drucker&hash=item27e260a41dhttp://www.ebay.de/itm/3d-druc... i saw this part. I think you are the developer of this item. (I use this item on my two K8200; thanks a lot for this work!). So i want to give you this information. I don't know the details of the copyrights of yor work or thingiverse, but i want that you know that your item is in ebay and someone tries to earn money with your work.

Thanks for your hint. That is indeed a copyright infringement, since there is no link to the original source of the part. But i didn't invent the part by myself. I only improved the original. And it seems he did not make hundreds of them, so who it doesn't really matter. And great that you make use of the part. Happy printing.

i made one but is normal that the small holes for the nuts are filled with small pla strings, also i have a lot of strings over any gap, is this normal or not? whats the best way to clean up the print, if anybody could send me te settings for the slicer because i don't have an idea what to do.
going to instal the mount tonight i spend 45 minutes opening the holes and cleaning the print :-)

Hi i had the same problems with all prints. For me a lower printhead temperature solved the problem. No yet perfect but better.

Works like a charm.. It reduced the wobbling a lot, but still there is still some small traces left.. I'd like to add that I changed the rod too! Because it was ruined from the last motor holder! But this holder is great! Printed with 0.2mm layer height and 25% infill! I would like to add that the micro-switch holes on the holder doesn't line up with both the holes on the switch! So I chose to just screw it with one screw..

Thank you. I will check the distance and upgrade it. Actually i did use only one screw because i did not had a second screw ;) But it should be possible to drill out one hole to fit the second screw, since the outer corner does not have "statical" function.

Hi. When I unrar the file, there's an error and the stl of the shorter version ends up with 0 KB. I can't print it.

You are right indeed. I do not know what thingiverse does to the file. But you can download the shorter version from the individual file list. I just checked it. It is ok, only the archive with all files is broken (i do not know who to fix that, because the thingiverse site did produce it).

Actually i contacted thingiverse and they confirmed the bug.

I printed the high version anyway and it works just perfect! Thanks! I added a holder for Z switch and a micrometer to adjust the Z axis easily. I will post them soon.

I printed your "Low rider" version. Good design! Thank you

I printed one and very nice work !!! Thanks

It should be noted that this only works if you have a high bed ( mounted mirror plate ). Otherwise the nozzle ends up floating about 10 mm above the bed.

mstolt - in reply to mx5

Sorry you are totally right. I use a mirror plate to print on. This is necessary to compensate the warped bed i have. I will add a "low rider version".

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