Unusually High Z step/mm Setting

Trying to figure out how come my 1000mm X-carve requires such a high setting for $102?
The troubleshooting started when I my x-carve (brand new) wouldn’t cut to the correct depth. Setting was to cut down to 0.25" and would only cut perhaps to half, or less.
This was in Easel

I’ve spent several hours working the calculations and tutorials that already exist to dial in the $100, $101, and $102 settings using Universal G-Code Sender.
X and Y are acceptably close with the default settings of 40.
Z however currently requires me to set it to 718!
The test case, using Universal G-code sender was to command a height of 19mm. Only would lift to 5mm.
I’ve run the machine set-up in Easel.

Machine is a X-carve 1000 mm with Dewalt 611, ACME Rod and NEMA 23’s

I haven’t run the original cut with these settings until I better understand what may be up.

Current settings are below:

$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=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)
$100=40.000 (x, step/mm)
$101=40.000 (y, step/mm)
$102=718.110 (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=790.000 (x max travel, mm)
$131=790.000 (y max travel, mm)
$132=100.000 (z max travel, mm)

Check the micro-stepping jumper on the gShield.

There should only be one jumper installed.

Hm, just checked and there are none installed.
I take it the next step will be to contact Inventables for spare?


Depending on how comfortable you are with electronics, you could use a temporary fix while you are waiting for the replacement… The jumper is just a shorting block between the two pins. You can find them on computer disk drives or motherboards if you have something like that laying around.

Thanks, Larry.

Found a spare jumper and sure enough, that seems to have addressed the problem.

Thank you very much for the assistance!

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Thanks for this. We’ve realized we’re also missing this jumper, and are working on finding a replacement for it. Hoping that gets everything running right!