[Prusa XL | Dual Toolhead] Unused Toolhead still performs purge at print start (even if not used in model)
Hi everyone,
I’m using a Prusa XL with 2 toolheads (Tool 1 = T0, Tool 2 = T1). At the moment, only Tool 2 (T1) has filament loaded (PLA), while Tool 1 (T0) is completely empty.
In PrusaSlicer (2.9.2), I did the following:
Assigned all objects, supports, and skirts/brims to Tool 2 (T1)
Disabled the wipe tower
Verified that no part of the model uses Tool 1 (T0)
Sliced the model for printing only with T1
However, when starting the print, the printer still commands Tool 1 (T0) to move forward for a purge/cleaning action and tries to extrude about 0.06 g of filament — even though there is no filament loaded. As a result, the print stalls because Tool 1 is empty.
It looks like the purge routine for T0 is triggered automatically during the start sequence, even if that tool is not assigned anywhere in the sliced model.