Built a larger machine based on the Xcarve tech. Most of the electronics are from Inventables, so is some of the hardware. I had the machine running fine with endstops turned off (not cutting yet), and got around to getting them installed tonight. After working through several problems, we got the machine to home properly.
However, as soon as it completes the H cycle, it faults right back out with an “Alarm: Hard Limit” notice in UGCS. The only thing we can think of after checking over the entire machine multiple times in possibly electrical interference from the unshielded endstop wires being run with everything else (servo power, spindle power).
The machine is running on on of the recent grbl’s, and UGCS is 1.0.9
Any ideas? I’ll post the current settings below if anyone notices anything there. $25 is set to 350 because anything faster is too fast for the Z axis, and I don’t know of a way to set separate values for the axis’. $26 has had several values tonight, 50 just happens to be current. Some of the original homing problems cleared up when we turned it down from 250.
$0=10 (step pulse, usec)
$1=255 (step idle delay, msec)
$2=0 (step port invert mask:00000000)
$3=3 (dir port invert mask:00000011)
$4=0 (step enable invert, bool)
$5=0 (limit pins invert, bool)
$6=0 (probe pin invert, bool)
$10=3 (status report mask:00000011)
$11=0.020 (junction deviation, mm)
$12=0.002 (arc tolerance, mm)
$13=0 (report inches, bool)
$20=1 (soft limits, bool)
$21=1 (hard limits, bool)
$22=1 (homing cycle, bool)
$23=1 (homing dir invert mask:00000001)
$24=25.000 (homing feed, mm/min)
$25=350.000 (homing seek, mm/min)
$26=50 (homing debounce, msec)
$27=1.000 (homing pull-off, mm)
$100=40.000 (x, step/mm)
$101=40.000 (y, step/mm)
$102=320.000 (z, step/mm)
$110=8000.000 (x max rate, mm/min)
$111=8000.000 (y max rate, mm/min)
$112=500.000 (z max rate, mm/min)
$120=500.000 (x accel, mm/sec^2)
$121=500.000 (y accel, mm/sec^2)
$122=50.000 (z accel, mm/sec^2)
$130=1000.000 (x max travel, mm)
$131=750.000 (y max travel, mm)
$132=120.000 (z max travel, mm)