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Brandon2255p

Chinese CNC Custom Z-Mount

by Brandon2255p Jan 25, 2018
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Hi. To build your z-mount you need the 3d-printed piece, two LM8UU linear bearings, and an T8 anti-backlash nut. Right? I have found two different T8 anti-backlash nuts,
https://www.aliexpress.com/item/4000062615421 and https://www.aliexpress.com/item/32906741888.html

What's best in your opinion?

Happy 2020!

Hi, I reused the antibacklash that came with my machine. If my memory serves me correctly, https://www.aliexpress.com/item/32906741888.html is what mine looks like. I think that would be perfect

Hello, can you redesign X carriage for this LML12uu bearings?:
https://www.aliexpress.com/item/32981570062.html?spm=a2g0s.9042311.0.0.73c04c4dFq9oUI

And Z carriage for this LM12uu bearings:
https://www.aliexpress.com/item/32834704469.html?spm=a2g0o.cart.0.0.3d3a3c00zd4UFg&mp=1

It is very important for me, if you can please redesign it.

Hello, can you redesign X carriage for this LML12uu bearings?:
https://www.aliexpress.com/item/32981570062.html?spm=a2g0s.9042311.0.0.73c04c4dFq9oUI

And Z carriage for this LM12uu bearings:
https://www.aliexpress.com/item/32834704469.html?spm=a2g0o.cart.0.0.3d3a3c00zd4UFg&mp=1

It is very important for me, if you can please redesign it.

the orange one its for cnc 3018 and the blue its the one u made.
u see the CC for the axel its not the same,

Thanks. Please see the attached image. If you give me measurements A and B then I will adjust it for you

A its the same and B its 35 mm
A cus am using the LUU8, so just change the B to 35 and i think it will be fine ^^

you see its not the same and u can not join them to the next part

I have added CNC Z Mount_CNC3010.stl

Well i printet and its good BUT its not fit on CNC 3018

Hi,
Thanks for the Design, I just finished printing and am about to install my dremel. Fits perfect. I have only one question. The anti backslash nut in my cnc was installed on the top of the backside holder. Your design has it on the bottom which results in a force pressing upwards. Am I doing something wrong here?
Tx Andreas

Hello, thank you got the feedback. It would be awesome if you could post a make of this when it is in action.
I never noticed the anti-backlash nut being on the wrong side. I suspect mine was assembled that way to begin with and that would be why I designed it that way.
From my understanding the spring will be pushing down on the anti-backlash nut and upward on the part which has a press fitted nut. This should just provide some force on both threads to stop backlash. There should not be a separate force upwards or downwards.

Hi, I will post as soon as I have it operating.
On my original the assembly is a) T-Nut, b) Spring, c) Thread into plastic (see pictures). This assures that the T-Nut is held in Position by the axis-Thread while still being able to wiggle a bit but it cannot shoot out if unthreaded to far. When the T-Nut is at the bottom then it always is a "loaded gun" ready to shoot out. Not sure which version is really better. I will try it your way first, but as I am missing a threaded insert I will first add a printed thread to the assembly.

Thanks for the file :) I have noticed that the head does not reach the bed without propping up the material. is this the case with your machine as well? also do you have a mount for the original spinal in case :)

I do not understand the issue you are having with the head and the bed. Maybe you can share a picture of the problem.

I can modify the laser mount and make it hold a spindle. What is the diameter of your spindle?

Thanks for the speedy reply :) I have attached images to show you, but it's not a big issue, I just added 25mm of wood stock so that I can get a cut. The spindle is the original one, of 44.6mm. It would really be amazing if you could make that. Just so that if need be I can go back to the original spindle for smaller tasks and still use my rotary tool. I think the issue is due to it not being the exact same model as your Tork Craft tool, but it still fits

Added a laser_spindel STL but I have not tested it. It is 45 mm diameter. Please post a make once you have printed it :)

Also, its weird that your rotary tool is so much higher. I made mine as low as possible - making it lower would have introduced less Z stability.