Issue with Tai Chi extruder setup

General Discussion
3

To use the Tai-Chi hotend, youll need to set up your second extruder as an extruder stepper, something like this

[extruder_stepper extruder1]
extruder: 
step_pin: PC13
dir_pin: !PF0
enable_pin: !PF1
microsteps: 16
rotation_distance: 7.71

youll then need to need to configure your T0 and T1 macros to change the extruder thats been used

[gcode_macro T0]
gcode:
	SYNC_EXTRUDER_MOTION EXTRUDER="extruder" MOTION_QUEUE="extruder"
	SYNC_EXTRUDER_MOTION EXTRUDER="extruder1" MOTION_QUEUE=""

[gcode_macro T1]
gcode:
	SYNC_EXTRUDER_MOTION EXTRUDER="extruder" MOTION_QUEUE=""
	SYNC_EXTRUDER_MOTION EXTRUDER="extruder1" MOTION_QUEUE="extruder"

if you want to use PA, then you need to set that in the startup gcode

[delayed_gcode STARTUP_GCODE]
initial_duration: 0.1
gcode:
	set_pressure_advance extruder=extruder advance=0.45 smooth_time=0.04
	set_pressure_advance extruder=extruder1 advance=0.45 smooth_time=0.04