Pressure advance in multihead

Basic Information:

Printer Model: DIY coreXY Printer
MCU / Printerboard: RAMPS-FDv2

Fill out above information and in all cases attach your klippy.log file. Pasting your printer.cfg is not needed
Be sure to check our Knowledge Base and in particular this and this post

Describe your issue:


I am using printermods xchange and would like to switch between the following three with the T command.

1.0.4mm diameter direct extrusion
2.0.2mm diameter Bowden extrusion
3.0.4mm diameter Bowden extrusion, motor shared with #2.

I tried to apply pressure advance on #3 and started printing the tuning tower and got an error.
console msg : Unable to infer active extruder stepper.
Is there any solution?

klippy.log (11.8 KB)

Thank you.
I have also configured my printer.cfg by reading this topic.
So I was able to switch the extruder with T0 and T1, but I was having trouble tuning the pressure advance.

The documentation also mentions the EXTRUDER argument.
SET_PRESSURE_ADVANCE [EXTRUDER=<config_name>] [ADVANCE=<pressure_advance>] [SMOOTH_TIME=<pressure_advance_smooth_time>]

I missed it, so I’ll give it a try.