Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: cncmattnz on November 28, 2022, 07:54:29 PM

Title: z axis always short by the same value
Post by: cncmattnz on November 28, 2022, 07:54:29 PM

Hi, I am using Mach3, and just recently every time I run a file, the Z axis is 0.025mm short.  If the Gcode says 4.2mm on z when looking at the mach3 dashboard as the file is running it says it is at 4.175 down on z axis.

Is there a setting somewhere that might be causing this?

Thank you

Title: Re: z axis always short by the same value
Post by: joeaverage on November 28, 2022, 10:29:15 PM

Hi,
what is the resolution of your machine?. It rather sounds like its 0.025mm in which case the machine is always just one step short.
I have seen that before, usually a mix-up between pull-up verses pull-down, and as a consequence the machine actually does 999 steps
when you commanded it to do 1000 steps.

Craig