BTT MOT EXP V1.0 board - Second Motor active when 1st is in use KLIPPER

[VORONENTHUSIAST]

So, I have a problem where the second motor on my BTT MOT EXP board is active whether or not it's in use. This is my 3rd extruder module, First extruder is on my main board, second extruder is Port 1 on the MOT EXP, etc. etc.

I've put my firmware excerpt below:

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Extruder Motors

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The default configuaration for this firmware is the Bowden Feed, using the Mobius M4 extruder.

If you intend to use the Afterburner Direct Drive, please change the gear ratio to 50:17 and calculate your roation distance prior to calibrating.

This firmware is configured to run a 3into1 extrusion setup. It utilises the Big Tree Tech MOT EXP v1.0 board to run 2 extra motors for the print head.

PLEASE NOTE - If you are using another type of feeding system, you will need to edit this heavily.

"Extruder" Motor - Use "E0" Port on MKS SKIPR V1.0 board

[extruder]
step_pin: PB5
dir_pin: PB4
enable_pin: !PB6
microsteps: 16 rotation_distance: 22.56 # Bondtech 5mm Drive Gears gear_ratio: 80:20 # Mobius M4 Bowden 80:20 full_steps_per_rotation: 200 # 200 for 1.8 degree, 400 for 0.9 degree nozzle_diameter: 0.800 filament_diameter: 1.750 min_temp: 0 max_temp: 275 heater_pin: PB1 sensor_type: Generic 3950 sensor_pin: PC1 max_power: 0.7 control : pid
pid_kp : 19.207 pid_ki : 0.865 pid_kd : 106.597 pressure_advance: 0.65 # Caluclated using the pa-cal macro. This needs to calculated for each individual filament you use. pressure_advance_smooth_time: 0.150 max_extrude_cross_section: 10 instantaneous_corner_velocity: 1.000 max_extrude_only_distance: 650.0 max_extrude_only_velocity:5000 max_extrude_only_accel:2000 step_pulse_duration:0.000004

"Second_Extruder" Motor - Use "M1" Port on BTT MOT EXP V1.0 board

[extruder_stepper second_extruder] extruder: extruder
step_pin: PA7 # EXP2_6 dir_pin: PE8 # EXP2_5 enable_pin: !PD13 # !EXP2_7 microsteps: 16 rotation_distance: 22.56 # Bondtech 5mm Drive Gears gear_ratio: 80:20 # Mobius M4 Bowden 80:20 full_steps_per_rotation: 200 # 200 for 1.8 degree, 400 for 0.9 degree pressure_advance: 0.65 # Caluclated using the pa-cal macro. This needs to calculated for each individual filament you use. pressure_advance_smooth_time: 0.150

"Third_Extruder" Motor - Use "M2" Port on BTT EXP-MOT V1.0 board

[extruder_stepper third_extruder]
extruder: extruder step_pin: PE9 # EXP2_3 dir_pin: !PA4 # EXP2_4 enable_pin: !PE7 # !EXP1_8 microsteps: 16 rotation_distance: 22.56 # Bondtech 5mm Drive Gears full_steps_per_rotation: 200 # 200 for 1.8 degree, 400 for 0.9 degree gear_ratio: 80:20 # Mobius M4 Bowden 80:20 pressure_advance: 0.65 # Caluclated using the pa-cal macro. This needs to calculated for each individual filament you use. pressure_advance_smooth_time: 0.150

"Fourth_Extruder" Motor - Use "M3" Port on BTT EXP-MOT V1.0 board.

[extruder_stepper fourth_extruder]
extruder: extruder step_pin: PA6 # EXP2_1 dir_pin: PA5 # EXP2_2 enable_pin: !PE15 # !EXP1_7 microsteps: 16 rotation_distance: 22.56 # Bondtech 5mm Drive Gears full_steps_per_rotation: 200 # 200 for 1.8 degree, 400 for 0.9 degree gear_ratio: 80:20 # Mobius M4 Bowden 80:20 pressure_advance: 0.65 # Caluclated using the pa-cal macro. This needs to calculated for each individual filament you use. pressure_advance_smooth_time: 0.150

I will say with this, I haven't changed the extruder setup in Prusa Slicer to include motors 3 and 4 yet, could this be the reason why?

[VORONENTHUSIAST]

I worked it out - I forgot to change my macro when I added my extra extruders.

[Shamoon78]

Hi Mate and what did you use for Uart CS pin ?

[tanjunior]

Hi Mate and what did you use for Uart CS pin ?

yea i want to know as well

[VORONENTHUSIAST]

@Shamoon78 @tanjunior

Apologies, I've been away from the hobby for a while - M1 Port uses PD8 (EXP1_6) M2 uses PD10 (EXP1_4) M3 uses PE10 (EXP1_2)

Please note I'm using the MKS SKIPR V1.0 board, so this is matched up to that.

Hope that helps

[tanjunior]

@Shamoon78 @tanjunior

Apologies, I've been away from the hobby for a while - M1 Port uses PD8 (EXP1_6) M2 uses PD10 (EXP1_4) M3 uses PE10 (EXP1_2)

Please note I'm using the MKS SKIPR V1.0 board, so this is matched up to that.

Hope that helps

I am also using EXP1_6 for my MKS ROBIN E3D, no idea why it's not working. My issue here #28 If you could help.

[VORONENTHUSIAST]

@Shamoon78 @tanjunior Apologies, I've been away from the hobby for a while - M1 Port uses PD8 (EXP1_6) M2 uses PD10 (EXP1_4) M3 uses PE10 (EXP1_2) Please note I'm using the MKS SKIPR V1.0 board, so this is matched up to that. Hope that helps

I am also using EXP1_6 for my MKS ROBIN E3D, no idea why it's not working. My issue here #28 If you could help.

I had to cut the tabs off of the ribbon cable connectors on the MKS SKIPR side and insert them the other way around, I can't see the pinout for the E3D board in the MKS github (coming up as an invalid .pdf) so can't confirm if you need to so the same