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Bungard GRBL

Projekt: Bygge GRBL styring til Bungard CNC

Hardware

CNC Shield (Arduino Nano), med mods:
- 220nF + 1kOhm mellem endstop pins og GND (filter)
- 100 ohm modstand mellem M2 og 5V på stepper driver (quarter micro step)
- VMOT jumper er pillet af (motors får 24V fra PSU, arduino 5V fra USB)
4.2A, 24V Power Supply (motors)
DC-DC Step-Down converter (til FAN)
1-channel relay module (spindel)
PC (LUbuntu/bCNC)
D-SUB 15 interface til Bungard motors og endstops

Arduino firmware: GRBL 1.1
- Hal9k repo with Bungard changes (branch hal9k-bungard)
- Pins til direction & step er byttet om (rettet i cpu_map.h)
bCNC

Settings	Description	Changed
$0=10	Step pulse, microseconds
$1=255	Step idle delay, milliseconds	255=Keep motors on
$2=0	Step port invert, mask
$3=0	Direction port invert, mask
$4=0	Step enable invert, boolean
$5=0	Limit pins invert, boolean
$6=0	Probe pin invert, boolean
$10=1	Status report, mask
$11=0.010	Junction deviation, mm
$12=0.002	Arc tolerance, mm
$13=0	Report inches, boolean
$20=1	Soft limits, boolean	TRUE=stay inside limits
$21=0	Hard limits, boolean
$22=1	Homing cycle, boolean	TRUE=enabled
$23=3	Homing dir invert, mask	X/Y at min, Z at max
$24=25.000	Homing feed, mm/min
$25=500.000	Homing seek, mm/min
$26=250	Homing debounce, milliseconds
$27=1.000	Homing pull-off, mm
$30=1000	Max spindle speed, RPM
$31=0	Min spindle speed, RPM
$32=0	Laser mode, boolean
$100=80.000	X steps/mm	80 at quartermicrostep
$101=80.000	Y steps/mm	80 at quartermicrostep
$102=71.000	Z steps/mm	71.0 at quartermicrostep
$110=800.000	X Max rate, mm/min
$111=800.000	Y Max rate, mm/min
$112=800.000	Z Max rate, mm/min
$120=10.000	X Acceleration, mm/sec2
$121=10.000	Y Acceleration, mm/sec2
$122=10.000	Z Acceleration, mm/sec2
$130=500.000	X Max travel, mm	Work area
$131=318.000	Y Max travel, mm	Work area
$132=200.000	Z Max travel, mm	Work area