Homemade vertical mill/drill CNC project

matthewsx

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I'm sure some of you have seen my posts in the general section about this project.


But now that I'm ready to start on the controls I figured it would fit better here (mods please let me know if there's a more appropriate place).

295758

I got a nice package of NEMA 23 stepper motors from a fellow member here and am about ready to jump into it.

295759

I already have my PC setup with LinuxCNC and a parallel card, PCI video card is on the way too since the onboard video may be problematic.


I'm currently working with this ST-V3 breakout board.

https://www.amazon.com/gp/product/B0093Y897A/ref=ppx_yo_dt_b_asin_title_o02_s01?ie=UTF8&psc=1

and these TB6600 stepper drivers

https://www.amazon.com/gp/product/B06XSBB45M/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

My plan is to keep things fairly simple and try to get everything talking first before working on the mountings.

Any and all comments, criticism, suggestions, etc. is appreciated since I've never done anything remotely like this before.

Cheers,

John
 

matthewsx

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I also plan on converting the table I have to linear slides and ballscrews.

tablelin1.jpeg
 

matthewsx

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Another milestone, I have LinuxCNC talking to my stepper through the ST-V3 interface board and a TB6600 driver.

talkie1.jpeg

talkie2.jpeg
 

matthewsx

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I just bought this thing on the bay today.
I'm sure it will be accurate, hopefully it will be rigid enough.

s-l1600.jpg
 

matthewsx

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Back together with some improvements like replaced the Y-axis screw with a straight one, fixed geometry for max table travel and stainless cover between the base and joints.

mill1.jpeg

I have some cast stock to make workholding fixtures so I can ditch the cheap vise.

John
 

matthewsx

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Well, this was today....

The Z axis wouldn't go up or down, the roll pin that holds the ring onto the ballscrew sheared so I figure it's as good a time as any to strip her down and redesign all the stuff that's been bugging me.

complete.jpeg

base-Z.jpeg

XY.jpeg

John
 

matthewsx

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I re-arranged the ballscrew and head mounting, then mocked up a direct drive from underneath to test capacity. I'll definitely have to go to a NEMA 34 stepper motor but was planning on doing that anyway (I already have the drives). Also I ordered some epoxy so I can start building the mold for the epoxy/granite base I had planned originally.

testz.jpeg

John
 

matthewsx

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Finished getting my garden in so I had some time to get back to the mill.

Built the Z axis mount for my new NEMA 23 425oz motor.

DSCN1340.JPG

DSCN1341.JPG

It works great so I put the mil back together, still waiting on epoxy so I can pour the base.

DSCN1342.JPG

1ohn
 

macioman

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How did you determine the appropriate center screw size for optimal bed size/weight/travel?
 

matthewsx

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How did you determine the appropriate center screw size for optimal bed size/weight/travel?
Hi and welcome to the forum.

That's a great question but one I really don't have an answer for. When I bought the X-Y stage off ebay it had a little bitty thing for the Y-axis.


I knew it probably wouldn't work but set it up anyway to make sure. I already had a 1605 ballscrew and some linear rail so that's what I went with. The new Y-axis was really just a SWAG on what I thought would work but there was a lot of trial and error in getting everything lined up right.

There are a bunch of guys on here who can probably give a more scientific answer, and there are books with calculations + manufacturers documentation to go on if you are designing from scratch. My project is really a design as you go exercise more than anything else.

Hope that helps, let us know what your goals are and maybe we can give specific advice.


Cheers,

John
 
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