home built z's postem up if any

[HammerDownJustin]

Just curious how many people built there own z axis? I'm thinking about building one for the cnc router table Im fixing to do. Mine on my homebuilt table was a kit from droid cnc or whatever his name was out of Oklahoma years ago.. Thank you just wanting some fresh ideas.

[HammerDownJustin]

Pretty nice

[acourtjester]

Here is mine

router and parts (5).JPG

Z drive parts (3).jpg

motor drive install (6).JPG

[HammerDownJustin]

Are the screw drives very hard to figure out the steps when setting motors up? Fixing to start a wood router table next for the wood shop. My current z on my plasma table is rack and pinon.

[Simko]

Are the screw drives very hard to figure out the steps when setting motors up? Fixing to start a wood router table next for the wood shop. My current z on my plasma table is rack and pinon.

I just set mine up on Sunday. My z is direct coupled (no belt reduction) If you know the screw pitch, it's pretty easy. 0.200" pitch is 5 turns per inch, 0.100" pitch is 10 turns per inch. Some screws are rated in threads per inch and number of starts. A 10 thread per inch, 2-start screw is the same as a 5 turn per inch screw. A 10 thread per inch, 1-start screw is the same as a 10 turn per inch screw.

Number of threads per inch divided but the number of starts = number of turns per inch.

Pitch = 1" / number of turns per inch.

Number of steps for one rev of stepper - 200
10x micro stepping = 200 revs X 10 =2000 steps per rev
0.200" pitch screw is 5 turns per inch X 2000 steps per rev (turn) = 10,000 steps per inch

I used exactly 10,000 steps when I set mine up and I was within 0.0005" (yes,a half thousandth)

I would say they are easier to set up than rack and pinion.

[HammerDownJustin]

Thank you and yep when i set my rack and pinon up it was easy because there was a company that used to have a online calculator that gave you the number,,

[acourtjester]

Setting up the Z for a lead screw is easy just use Mach's "Steps per" cal under settings page. quick and easy no math involved.
I used rack Z on my first table but changes as the torch would drop when power was removed.

[exapprentice]

Somewhere in one of CandCNC manuals you can find the equation for calculating how to change the number of steps based over a distance to fine tune your table

[leggman]

My first build. works great

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[Mckenny87sj]

Holyshit leggman that was the best i have ever seen