tachometer_pin is not set correctly

[Lino77]

Part cooling fan

Multiple toolheads with part cooling fans configured

[fan] will use an unused io pin, proxy m106 settings to active toolhead via macro.

[fan]
pin: rpi:gpio4 # sacrifical part fan, use this to independently control your both toolhead part fans
[fan_generic part_fan_t0]

4-pin fan connected to 4-pin header on T0 (SB2209 v1.0 RP2040) - digital pwm

pin: toolboard_t0:gpio15
cycle_time: 0.00004

tachometer_pin: ^gpio12 > correct is = tachometer_pin: ^toolboard_t0:gpio12

tachometer_poll_interval: 0.0005
[fan_generic part_fan_t1]

4-pin fan connected to 4-pin header on T1 (SB2209 v1.0 RP2040) - digital pwm

pin: toolboard_t1:gpio15
cycle_time: 0.00004

tachometer_pin: ^gpio12 > correct is = tachometer_pin: ^toolboard_t1:gpio12

tachometer_poll_interval: 0.0005