USING A VFD
QtWoodPecker was designed to interface to a VFD, but will work without one for simulation purposes. There are a number of VFD drivers included in the linuxcnc distribution, including hy_gt_vfd and mb2hal. A custom HAL component has been created for use with QtDragon, called hy_gt_vfd.py (same name as the linuxcnc version)
The following HAL connections must be added to the qtdragon_postgui.hal file:
loadusr -Wn gt_vfd ./hy_gt_vfd.py -d /dev/ttyUSB0
net spindle-on gt_vfd.spindle-on <= spindle.0.on
net spindle-fb gt_vfd.speed-fb => spindle.0.speed-in
net spindle-cmd gt_vfd.speed-cmd <= spindle.0.speed-out-abs
net spindle-amps gt_vfd.output-amps => woodpecker.spindle_amps
net spindle-volts gt_vfd.output-volts => woodpecker.spindle_volts
net spindle-fault gt_vfd.fault-info => woodpecker.spindle_fault
net modbus-errors gt_vfd.modbus-errors => woodpecker.modbus-errors
net spindle-fwd spindle.0.forward => and2.0.in1
net at-speed-fwd spindle.0.at-speed <= and2.0.out
net at-speed-fwd woodpecker.hal_led_atspeed
NOTE: The hy_gt_vfd.py module requires the python pymodbus library.
sudo apt install python3-pymodbus