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

Mostly Printed CNC Bushing Remix

by rovirobot3478 Mar 19, 2016
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Can you post as stp or step file and I can work on it?

I posted the step file for you. Good luck

Looking good! but personally I would like to see Z axis beefed up and bushed easily acheivable on two levels then a face plate attached above and below riding in just front to carry spindle.

I am working on the center unit to add bushings but from my testing these are not really necessary however, I can see why people may want them. I saw somewhere there was a quick change tool add on. I think I am going to add a re-mix of that to this project as well.

Hmm, would bushings work on emt conduit? Or is there a better conduit material in your area that doesn't have the rough texture (galvanized) that I can get at the local big box store?

I am using emt conduit and it works great. Very smooth. I just used a 3m scrubber pad and shined it up a bit and the bushing slides with zero effort. The bars I got were from home depot found here: http://www.homedepot.com/p/Allied-Tube-Conduit-1-in-EMT-Conduit-101568/100400409

Awesome, I'll have to see if that's any different than the EMT Conduit I grabbed from local Lowes.

Have you tried attaching something a bit beefier to your center Z Gantry holder, like the Dewalt DW660 or even one of the many Compact Trim Routers. Wonder if adding in some bushings for the 2 Z conduits "might" stop any eventual where down for the plastic which will cause some Z slop (guess-timation not based in reality).

Another thing I noticed is if you put pressure in an upward direction on the Z gantry it will pop out of that Nut catch where the threaded rod goes into. This can happen when working on heavier materials (oak, aluminum, etc). Might be better to have the hard stop (the section stopping the nut/rod from bottoming out) at the top of that piece, then create a cap at the bottom that can be screwed in place so that gravity doesn't bottom out the Z.

I do love how simple that center section looks to print, compared to the 15 piece + 500 nuts and bolts version I just created :-)

/2 cents

I am using the Dewalt 660 it handles the weight just fine. I glue the screw into the hole. It is not going anywhere.

Awesome! I would be interested in a nema 17 mount

I will get back to you when it is ready. Please give me a bit.