Z axis issues - either too deep or too shallow

Discussion about the arduino based g-code interpreter, grbl
Camel
Posts: 15
Joined: Tue Mar 04, 2014 11:07 pm

Re: Z axis issues - either too deep or too shallow

Post by Camel » Sun Apr 13, 2014 3:14 pm

I'm still struggling to get my machine to operate as it should.

I just ran the Circle Diamond Square Test linked and the Z was either cutting too deep or too shallow. :evil:

I've run all sorts of tests using Makercam and Inkscape, running the code through OpenScam (and UGS's visualizer), and everything looks good. So I still assume the issue is how GRBL is interpreting the commands.

here are my current GRBL setting:

**** Connected to COM3 @ 115200 baud ****

Grbl 0.9b (20131210) ['$' for help]
>>> $$
$0=53.000 (x, step/mm)
$1=53.000 (y, step/mm)
$2=675.000 (z, step/mm)
$3=500.000 (x max rate, mm/min)
$4=500.000 (y max rate, mm/min)
$5=200.000 (z max rate, mm/min)
$6=50.000 (x accel, mm/sec^2)
$7=50.000 (y accel, mm/sec^2)
$8=50.000 (z accel, mm/sec^2)
$9=225.000 (x max travel, mm)
$10=125.000 (y max travel, mm)
$11=170.000 (z max travel, mm)
$12=10 (step pulse, usec)
$13=500.000 (default feed, mm/min)
$14=192 (step port invert mask, int:11000000)
$15=25 (step idle delay, msec)
$16=0.020 (junction deviation, mm)
$17=0.005 (arc tolerance, mm)
$18=3 (n-decimals, int)
$19=0 (report inches, bool)
$20=1 (auto start, bool)
$21=0 (invert step enable, bool)
$22=0 (soft limits, bool)
$23=0 (hard limits, bool)
$24=0 (homing cycle, bool)
$25=0 (homing dir invert mask, int:00000000)
$26=50.000 (homing feed, mm/min)
$27=500.000 (homing seek, mm/min)
$28=250 (homing debounce, msec)
$29=1.000 (homing pull-off, mm)

Any ideas?

RobCee
Posts: 587
Joined: Wed Jan 08, 2014 11:33 am
Location: Birmingham, UK

Re: Z axis issues - either too deep or too shallow

Post by RobCee » Sun Apr 13, 2014 5:08 pm

Try $5=100 and $8=10 if it's your Z-Axis that is troubling you. 200/50 is a bit too fast for a stock lead screw.


RC - Tapatalk
ShapeOko2 #3400 - Chinese 800W AC Spindle - Stiffened X-Axis - TR10 Z-Axis - Inverted Z Motor - Hall Effect Limits - Drag Chains & Custom Brackets

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