Machsupport Forum

Mach Discussion => Mach4 General Discussion => Topic started by: randybradley on March 17, 2021, 06:02:53 PM

Title: mach4 will no hold zero
Post by: randybradley on March 17, 2021, 06:02:53 PM

I run a program, put in another part to machine. Zero is off by as much as .125.

Title: Re: mach4 will no hold zero
Post by: Greekart on March 17, 2021, 06:07:44 PM

Quote from: randybradley on March 17, 2021, 06:02:53 PM

I run a program, put in another part to machine. Zero is off by as much as .125.

Before you work with other program/setup and was everything ok? Are you sure that is not mechanical problem? Is not long time i use Mach4 but problem like this haven't seen.

Title: Re: mach4 will no hold zero
Post by: randybradley on March 17, 2021, 06:23:15 PM

Hi Greekart, Thank you for your reply. When I operate it manually, it works fine. When I type in a G code or  enter a G code using a cad cam program is when zero messes up.

Title: Re: mach4 will no hold zero
Post by: Greekart on March 17, 2021, 06:27:03 PM

Quote from: randybradley on March 17, 2021, 06:23:15 PM

Hi Greekart, Thank you for your reply. When I operate it manually, it works fine. When I type in a G code or  enter a G code using a cad cam program is when zero messes up.

Hi randy, do you have an example of the gcode that mess it up to post?

Title: Re: mach4 will no hold zero
Post by: KatzYaakov on March 17, 2021, 10:12:22 PM

cheack tool offset,bater add G40 on top
also cheack if you have G54-59 on top ,and if so if the parameters are corect

Title: Re: mach4 will no hold zero
Post by: Stuart on March 18, 2021, 03:45:25 AM

has tool offset been canceled in the Gcode

Title: Re: mach4 will no hold zero
Post by: GOOMBA on March 18, 2021, 09:08:21 AM

Randy,
Let's do a test.
Home your machine, mark a spot on one end of your table.
Zero in this location.
Let's use your long axis.
Then command a rapid move from one end to the furthest point you can on your table without crashing.
G00 Y(Value here, assuming you're using your Y axis)
Then command G00 Y0 and go back.
Are you at the same location?
This will tell us if you're missing steps.