I think I figured it out! when I was doing the config for the stepper motors I was looking at a V1.0 pinout, but i have a V1.1 board. the pinouts are similar but not the same! and some of the pins are used for other things. Check your pinout version against your board version and this should give you the correct pin labels for step, direction, enable, and uart pins.

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Same issue here.
Sending a STEPPER_BUZZ stepper="the stepper on motor#6" : it goes only one way instead of changing direction at each buzz

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Same issue here! Just built a voron and have been banging my head against the wall trying to figure this out as m6 is my z3 stepper driver. WTF BTT this is bs.

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Triple checked, i have 1.1 board and use 1.1 pinout.

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Ya so I ended up just swaping z3 over to Stepper 8 and it put me in business. I would like to figure out why 6 dosent work right. I put in a ticket with Biqu but haven't gotten a response yet.

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ran into same issue, klipper voron cfg error-->dir_pin: !PD15 instead !PA14 wtf

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@sergelhr I just posted a pull request with a correct v1.1 Klipper cfg file.
54

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I'm having the problem with Motor 8 using the pin out I keep getting an error when i try a Stepper_buzz.
Can someone tell me the setting they used. Using with with RatOS. Its not the first time, other had reported the same problem.

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Is this what you have?

Motor8

#[extruder3]
#step_pin: PD8
#dir_pin: PC6
#enable_pin: !PC7
#heater_pin: PE1 # HE3
#sensor_pin: PA4 # T3

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Not at home right now have to check, i'm using it wth RatOS as stepper Z2.
Motor 6 and 7 work as stepper z and z1.

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This it what i have going by there digram.

[stepper_z2]
step_pin:PD11
dir_pin:PD9
enable_pin:PD15
uart_pin:PD14
diag_pin:null

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The v1.1 has different pin assignments for motors 6-8.

My sample M8P v1.1 cfg has been merged into BTT GitHub, you can find the correct pin assignments there.

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I also have the V1.1, thanks i'll go take a look

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Still cann't get it to work. I have this as the base config
aliases:

steppers

x_step_pin=PE2, x_dir_pin=PB4, x_enable_pin=PC11, x_uart_pin=PC10, x_diag_pin=PF3, x_endstop_pin=PF3,
y_step_pin=PF12, y_dir_pin=PF11, y_enable_pin=PB3, y_uart_pin=PF13, y_diag_pin=PF4, y_endstop_pin=PF4,
z0_step_pin=PA10, z0_dir_pin=PA14, z0_enable_pin=PA15, z0_uart_pin=PF8, z0_diag_pin=null,
z1_step_pin=PD11, z1_dir_pin=PD9, z1_enable_pin=PD15, z1_uart_pin=PD14, z1_diag_pin=null,
z2_step_pin=PD8, z2_dir_pin=PC6, z2_enable_pin=PC7, z2_uart_pin=PD10, z2_diag_pin=null,
#z3_step_pin=PC9, z3_dir_pin=PC8, z3_enable_pin=PD1, z3_uart_pin=PD0, z3_diag_pin=null,
e_step_pin=PD7, e_dir_pin=PD6, e_enable_pin=PF10, e_uart_pin=PF9, e_diag_pin=null, e_heater_pin=PE3, e_sensor_pin=PA1,
stepper_spi_mosi_pin=PA7, stepper_spi_miso_pin=PA6, stepper_spi_sclk_pin=PA5,

Z2 is like you said above but when i do a stepper_buzz i get this error
"Unable to read tmc uart 'stepper_z2' register IFCNT"

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@NAPCAL @azhago @sergelhr @RezezRX79 @12voltnick @Synapsis181

This issue was caused by the input voltage tolerance of one component connected to the 6th stepper driver being right on the edge of the 3V3 level that the MCU outputs. Some components accepted the level from the MCU and others did not. The component was swapped out for another with a broader input voltage range about 5 months ago and so all new boards do not have the issue any longer.

If you guys have been affected by this issue then BTT would like to offer you a 15% compensation off the cost of your board. Please contact me using the "bttuniversity" handle on discord.

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