Robots, with Frickin Lasers – GRBL Settings

While setting up my NEJE 500mw Desktop violet laser engraver, I found there was absolutely no documentation.  It came with a version of grbl on it, but I updated it to the latest Grbl 0.9j.

These settings are working pretty well for me.  I’ve tweaked the dir port invert mask to make the origin (0,0) take place when the gantry is closes to the circuit board.

Grbl 0.9j ['$' for help]
>>> $$
$0=100 (step pulse, usec)
$1=25 (step idle delay, msec)
$2=0 (step port invert mask:00000000)
$3=2 (dir port invert mask:00000010)
$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=0.010 (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=0 (homing cycle, bool)
$23=0 (homing dir invert mask:00000000)
$24=250.000 (homing feed, mm/min)
$25=250.000 (homing seek, mm/min)
$26=250 (homing debounce, msec)
$27=10.000 (homing pull-off, mm)
$100=80.000 (x, step/mm)
$101=80.000 (y, step/mm)
$102=80.000 (z, step/mm)
$110=750.000 (x max rate, mm/min)
$111=750.000 (y max rate, mm/min)
$112=500.000 (z max rate, mm/min)
$120=1000.000 (x accel, mm/sec^2)
$121=1000.000 (y accel, mm/sec^2)
$122=10.000 (z accel, mm/sec^2)
$130=175.000 (x max travel, mm)
$131=1200.000 (y max travel, mm)
$132=175.000 (z max travel, mm)
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One Response to Robots, with Frickin Lasers – GRBL Settings

  1. Eric Johnson says:

    I have the same Laser that you have and really wanted a little more control over it. The only problem is that I have NO idea how to get the GRBL controller to work. While this is a new area that i’m venturing into, It doesn’t seem harder than anything else I’ve done. Could you give a little more information on the process that you did in order to get the laser to accept GCODE. Explain it to me like I’m 5 years old lol.

    I just think that with a little more control over the path instead of just using the current scanline type engraving, it would alleviate the problem of NOT being able to engrave circles lol.

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