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Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Z Adjustable Bed for K40 Chinese Laser

by brianvanh Nov 21, 2016
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can I fit a different belt?

I really like this. It's a very simple design. Well done.

I built one myself but modified a few things. I didn't like how the 3D printed pulleys worked after I super glued the 5/16" nuts into place. The pulley wobbled. I re-designed the T5 pulley with printed 5/16-18 threads. I chased them with a tap afterward to get a smooth fit. No wobble. A little dap of WD-40 on the threaded rod makes them even smoother.

The next thing I modified were the cut lengths of the aluminum angle. The 12" long piece I cut down to 10.875" and the 10" piece I cut down to 8.750". Combine that with my modified pulley OD and I should be able to get a McMaster-Carr #1679K537 T5, 10mm Wide, 5mm Pitch x 1100mm Dia. belt to fit. Belt should be here tomorrow so hoping everything works.

I can't seem to come across a belt with a T5 pitch (5mm) and a 6mm width. From my experience, 6mm belts are typically 2mm pitch, and T5 belts are 10mm wide. I'd like to identify this before I start printing. What was it you used?

I see one member here used the Gates 6-T5-1215 belt which does match those figures, but it's an odd ball and pricey belt.

Thank you though for your time and effort in designing this.

Im trying to figure out what kind of belt to yous. Looks like an automotive timing belt of some sort?

I think its the belt for 3d printers.

Thanks for your design, I enlarged the nut and bolt holes to accept M10 size threaded rod. I also drilled holes in the bottom of my K40 base so that it cant move about, Just waiting for the belt to arrive but so far it works fantastically, great mod, cheers

what length belt are you using for this?

Will you be using a top frame? I can see the belt pulling the threaded rods out of alignment without something to constrain them at the top. But other than that, nice job.

I think I need to. Right now my bed just sits on top and I've been using this fairly successfully for the past week or so...but it can be prone to falling out of alignment.

Honestly, after using it, I think a better approach might be to turn the bolts instead of the hubs. I think it would work better that way.

Saw your updated version...kudos on a working design.