This plugin adds support for VFD spindles via ModBus (RS485).
VFD spindle support is enabled in my_machine.h by uncommenting \\#define VFD_SPINDLE and changing the VFD spindle number to the desired type or -1 for all.
A list of supported VFDs and associated spindle numbers can be found here.
If all spindles or dual spindle is enabled the active spindle is configured by setting $395.
Note that the setting value not the same as the VFD spindle number used in my_machine.h, either use a sender that supports grblHAL setting enumerations
for configuration or output a list with the $$=395 command to find the correct setting value.
Switching between the configured VFD spindle and PWM output is possible via a M-code, currently M104: M104P0 for PWM (laser) and M104P1 for VFD.
Available when \\#define DUAL_SPINDLE is uncommented in my_machine.h for drivers that has support.
If all spindles are enabled M104Q<n> can be used to switch between them without changing the configuration. <n> is a spindle number as listed by the $$=395 command.
The MODVFD spindle uses different register values for the control and RPM functions. The functionality is similar to the VFDMOD component from LinuxCNC.
NOTE: M104 does not change the $32 setting for machine mode, the setting will still be used to select the spindle at startup.
NOTE: currently all VFD spindles use the same ModBus address, configured by setting $360 (default 1).
2022-06-18