BobsCNC E3, Assembly Manual, Page: 82 / 90

Page 82
GRBL and Universal G - code Sender Software
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Version 1.1e of GRBL has been uploaded to the controller.
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There are several G - code senders for GRBL. I have had success with the Universal G - code Sender
Platform Version
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Some of the firmware values can be changed from the G - code sender software. Below is a table for
the default values uploaded into the firmware from GRBL 1.1e.
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Please see our Q uick Start guide for getting started with the drivers and initial settings.
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Please see our troubleshooting guide for getting started with the drivers and initial settings.
Key Value Description
$0 5 (Step pulse time, microseconds)
$1 25 (Step idle delay, milliseconds)
$2 0 (Step pulse invert, mask)
$3 0 (Step direction invert, mask)
$4 0 (Invert step enable pin, boolean)
$5 1 (Invert limit pins, boolean)
$6 0 (Invert probe pin, boolean)
$10 1 (Status report options, mask)
$11 0.01 (Junction deviation, millimeters)
$12 0.002 (Arc tolerance, millimeters)
$13 1 (Report in inches, boolean)
$20 1 (Soft limits enable, boolean)
$21 0 (Hard limits enable, boolean)
$22 1 (Homing cycle enable, boolean)
$23 3 (Homing direction invert, mask)
$24 500 (Homing locate feed rate, mm/min)
$25 8000 (Homing search seek rate, mm/min)
$26 250 (Homing switch debounce delay, milliseconds)
$27 5 (Homing switch pull - off distance, millimeters)
$30 1000 (Maximum spindle speed, RPM)
$31 0 (Minimum spindle speed, RPM)
$32 0 (Laser - mode enable, boolean)
$100 80 (X - axis travel resolution, step/mm)
$101 80 (Y axis travel resolution, step/mm)
$102 2267.717 (Z - axis travel resolution, step/mm)
$110 10000 (X - axis maximum rate, mm/min)
$111 10000 (Y axis maximum rate, mm/min)
$112 500 (Z - axis maximum rate, mm/min)
$120 800 (X - axis acceleration, mm/sec^2)
$121 800 (Y axis acceleration, mm/sec^2)
$122 300 (Z - axis acceleration, mm/sec^2)
$130 450 (X - axis maximum travel, millimeters)
$131 390 (Y axis maximum travel, millimeters)
$132 85 (Z - axis maximum travel, millimeters)