Use the table below for your initial grbl setup of your 3018NC-PRO Desktop CNC Router. You may fine tune these variables as your application dictates. Note: Settings are given below for 8x micro stepping – if your controller uses another micro stepping value, you’ll need to adjust your steps/mm accordingly.
Key | Parameter | Value | w/Homing |
$0 | Step pulse time, micoseconds | 10 | |
$1 | Step idle delay, milliseconds | 25 | |
$2 | Step pulse invert | 0 | |
$3 | Step direction invert | 2 | |
$4 | Invert step enable pin | 0 (disable) | |
$5 | Invert limit pins | 0 (disable) | 1 (enable) |
$6 | Invert probe pin | 0 (disable) | |
$10 | Status report options | 1 | |
$11 | Junction deviation, millimeters | 0.010 | |
$12 | Arc tolerance, millimeters | 0.002 | |
$13 | Report in inches | 0 (disable) | |
$20 | Soft limits enable | 0 (disable) | 1 (enable) |
$21 | Hard limits enable | 0 (disable) | 1 (enable) |
$22 | Homing cycle enable | 0 (disable) | 1 (enable) |
$23 | Homing direction invert | 0 | 3 |
$24 | Homing locate feed rate, mm/min | 0.000 | 25.000 |
$25 | Homing search seek rate, mm/min | 0.000 | 1000.000 |
$26 | Homing swtich debounce delay, milliseconds | 0 | 250 |
$27 | Homing switch pull-off distance, millimeters | 0.000 | 1.000 |
$30 | Maximum spindle speed, RPM | 8000 (1000 w/ offline) | |
$31 | Minimum spindle speed, RPM | 0 | |
$32 | Laser-mode enable | 0 (disable) | |
$100 | X-axis steps per millimeter | 400.000 (8x microstepping) | |
$101 | Y-axis steps per millimeter | 400.000 (8x microstepping) | |
$102 | Z-axis steps per millimeter | 400.000 (8x microstepping) | |
$110 | X-axis maximum rate, mm/min | 3500.000 | |
$111 | Y-axis maximum rate, mm/min | 3500.000 | |
$112 | Z-axis maximum rate, mm/min | 1500.000 | |
$120 | X-axis acceleration, mm/sec2 | 60.000 | |
$121 | Y-axis acceleration, mm/sec2 | 60.000 | |
$122 | Z-axis acceleration, mm/sec2 | 60.000 | |
$130 | X-axis maximum travel, millimeters | 0.000 | 300.000 |
$131 | Y-axis maximum travel, millimeters | 0.000 | 180.00 |
$132 | Z-axis maximum travel, millimeters | 0.000 | 40.50 |