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your g-code is so that X0/Y0 is in Center of part.

on a normal Installation
x-movement (millbit related to part) moving from left to right is positive
y-movement (millbit related to part) moving from front to back is positive
related to your g-code workpiece X0/Y0 must be somewhere in the Center of table not at the border.

you have two possibilities:

1st Change motor wiring

A+ yellow
A- blue
B+ red
B- green

2nd invert the Setting for dir pin (active Low) of slave axis 

CS-Lab / Re: ePID fault... press RESET Mach 3 CSMIO/IP-A
« on: March 05, 2021, 10:29:45 AM »
did they install a new Version of Mach3?

Show us your G-Code file.

G00 Z10.0000
X11.6124 Y15.7764
G31 Z-150 F300.0
G92 Z-3.4000 (3.4 mm off-set until sensor triggered)
G00 Z3.0000

put just this code in a G-code file and run it multiple times, then check z-axis dro and physical z-Position.

can you pls post code how the zeroing is done? then we will have a look.

General Mach Discussion / Re: Mach3, Opt Laser 5W and Aspire
« on: March 05, 2021, 01:11:23 AM »
Looks like this solution would work.

General Mach Discussion / Re: Will mach 3 control a K40 laser?
« on: March 04, 2021, 06:39:50 AM »
there is a Software called K40 Whisperer.
witch might be suitable, just a thought.

Show"N"Tell ( Your Machines) / Re: LMS 5500 (SX2.7) Conversion
« on: March 04, 2021, 03:30:48 AM »
to use an external micrcontroller is also a plan, but 57CNC board can provide a 0-5V Signal and has a lot Outputs witch
can be used to "emulate" the pushbuttons.

this document:


says Motor Connections should be:
A+ red
A- green
B+ yellow
B- blue

different to your wiring.

sorry in interpreted the 20,000 as 20000 and not as 20, because 20000 would be extremly to much.
i have chosen 400 because your Motor is a 1.8Deg Motor so we have 200Steps/rev.
stepper controler is set 1/2 step so 200*2=400.