After set up wizard calibration, z movements still off (cutting too deep)

[rblissilab]

I am trying to get an old Stepoko CNC that I inherited from another teacher back up running for our makerspace. I have created a simple gcode using Fusion 360 to test out the machine. The file has a number of pocket clears at different depths. When I open the file in UGS, it looks good, but when I run the code, it cuts way to deep 2-4 times as much as what it is supposed to do.
I have tried disconnecting and redoing the set up wizard a number of times to calibrate the z direction, but I still get the same issues and cuts. Are there any further suggestions on how to fix the z displacement?

When calibrating -1 mm is -4.6 mm of displacement. My model and cut depths were done in inches.

[breiler]

And you are now certain that after calibrating, when jogging the Z axis 1mm will actually move the machine 1mm?

If not, which version of UGS are you running? What version of GRBL are you running (type $I in the console).

[rblissilab]

The z-axis is still moving incorrectly after the calibration. I hoped trying the wizard a couple of times would get it to calibrate correctly. Are there other ways to calibrate the system?

The UGS version is 2.0.13 on a mac laptop. I just went to the downloads section on this website and went with the newest Mac version.

I believe GRBL 0.9j.20160317:

[breiler]

There are plenty of ways to calibrate GRBL, just google calibrate grbl
Btw, that is a really old version of GRBL you should probably consider upgrading your controller.

[rblissilab]

Ok, I will try recalibrating. If it does not work, I will try upgrading.

[chrisla23]

While that is good advice to upgrade grbl, many things have changed since pre 1.x grbl. Pins got moved around, defaults changed, the flash will get wiped, etc. It may leave you needing to rewire.

…

-Chris

On Wed, Jan 11, 2023 at 11:48 AM Joacim Breiler ***@***.***> wrote: There are plenty of ways to calibrate GRBL, just google calibrate grbl Btw, that is a really old version of GRBL you should probably consider upgrading your controller. — Reply to this email directly, view it on GitHub <#2117 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKYAC2R4KCJW72JYK3MSX63WR4FB3ANCNFSM6AAAAAATXJ4ITE> . You are receiving this because you are subscribed to this thread.Message ID: <winder/Universal-G-Code-Sender/repo-discussions/2117/comments/4660188 @github.com>

[rblissilab]

Thanks for the advice. I will try recalibrating first before upgrading.