Hey folks, I need help. I recently upgraded to the linear z-axis from cnc4newbie, GT3 9mm belts and built Phil’s Controller. I thought everything works fine until today when I started the first 3D carve with the new setup. After 1/2 hour carving I realized that my z-axis cuts gradually deeper with each pass.
Right now I have no idea where to start troubleshooting. Is it due to interference, microsteps or something mechanical. I hope you guys can point me in the right direction.
One thing I was wondering since the z-axis upgrade is that my $102 value is 251.968 mm/steps, way different than others have posted. This is a 3/8-16 screw and a half step is 6400.
The driver for the z-axis is set to 2A
Here are my grbl settings:
Grbl 1.0c [’$’ for help]
[’$H’|’$X’ to unlock]
$0=10 (step pulse, usec)
$1=255 (step idle delay, msec)
$2=0 (step port invert mask:00000000)
$3=0 (dir port invert mask:00000000)
$4=0 (step enable invert, bool)
$5=0 (limit pins invert, bool)
$6=0 (probe pin invert, bool)
$10=2 (status report mask:00000010)
$11=0.020 (junction deviation, mm)
$12=0.002 (arc tolerance, mm)
$13=1 (report inches, bool)
$20=0 (soft limits, bool)
$21=0 (hard limits, bool)
$22=1 (homing cycle, bool)
$23=3 (homing dir invert mask:00000011)
$24=25.000 (homing feed, mm/min)
$25=750.000 (homing seek, mm/min)
$26=250 (homing debounce, msec)
$27=1.000 (homing pull-off, mm)
$30=1. (rpm max)
$31=0. (rpm min)
$100=26.629 (x, step/mm)
$101=26.629 (y, step/mm)
$102=251.968 (z, step/mm)
$110=8000.000 (x max rate, mm/min)
$111=8000.000 (y max rate, mm/min)
$112=700.000 (z max rate, mm/min)
$120=500.000 (x accel, mm/sec^2)
$121=500.000 (y accel, mm/sec^2)
$122=100.000 (z accel, mm/sec^2)
$130=787.000 (x max travel, mm)
$131=787.000 (y max travel, mm)
$132=125.000 (z max travel, mm)
