Shared TMC drivers SKR Mini E3 V3

[mvdveer]

Knew I should not have used these even if I had them. Can seem to solve this problem:

Here is the config extract:

 

[mcu]
serial: /dev/serial/by-id/usb-Klipper_stm32g0b1xx_48004D000950414733303120-if00
restart_method: command

[mcu zstep]
serial: /dev/serial/by-id/usb-Klipper_stm32g0b1xx_34002D000750414235363020-if00
restart_method: command

#####################################################################
#   X/Y Stepper Settings
#####################################################################
[stepper_x]
step_pin: PB13
dir_pin: PB12
enable_pin: !PB14
rotation_distance: 40
microsteps: 32
full_steps_per_rotation:200  #set to 400 for 0.9 degree stepper
endstop_pin: PC0
position_min: 0
position_endstop: 120
position_max: 120
homing_speed: 25   #Max 100
homing_retract_dist: 5
#homing_positive_dir: true

[tmc2209 stepper_x]
uart_pin: PC11
tx-pin: PC10
uart_address: 0
interpolate: false
run_current: 0.8
sense_resistor: 0.110
stealthchop_threshold: 999999

[stepper_y]
step_pin: zstep:PB13
dir_pin: zstep:PB12
enable_pin: zstep:!PB14
rotation_distance: 40
microsteps: 32
full_steps_per_rotation:200  #set to 400 for 0.9 degree stepper
endstop_pin: zstep:PC1
position_min: 0
position_endstop: 125
position_max: 125
homing_speed: 50  #Max 100
homing_retract_dist: 5
homing_positive_dir: true

[tmc2209 stepper_y]
uart_pin: zstep:PC11
tx_pin: zstep:PC10
uart_address: 0                          If I change this to  "zstep:0"   then I get a parsing error 
interpolate: false
run_current: 0.8
sense_resistor: 0.110
stealthchop_threshold: 999999
 
#####################################################################
#   Z Stepper Settings
#####################################################################
[stepper_z]
step_pin: ztep:PB10
dir_pin: zstep:!PB2
enable_pin: ztep:!PB11
rotation_distance: 32
microsteps: 16
endstop_pin: PC2
position_endstop: -5
position_max: 100
position_min: -15
homing_speed: 10
second_homing_speed: 5
homing_retract_dist: 3

[tmc2209 stepper_z]
uart_pin: zstep:PC11
tx_pin: zstep:PC10
uart_address: 1
interpolate: false
run_current: 0.6
sense_resistor: 0.110
stealthchop_threshold: 500

[stepper_z1]
step_pin: zstep:PB3
dir_pin: zstep:PB4
enable_pin: zstep:!PD1
rotation_distance: 32
microsteps: 16
#full_steps_per_rotation:200 

[tmc2209 stepper_z1]
uart_pin: zstep:PC11
tx_pin: zstep:PC10
uart_address: 3
interpolate: false
run_current: 0.6
sense_resistor: 0.110
stealthchop_threshold: 500

[stepper_z2]
step_pin: zstep:PB0
dir_pin: zstep:PC5
enable_pin: zstep:!PB1
rotation_distance: 32
#full_steps_per_rotation:200 
microsteps: 16

[tmc2209 stepper_z2]
uart_pin: zstep:PC11
tx_pin: zstep:PC10
uart_address: 2
interpolate: false
run_current: 0.6
sense_resistor: 0.110
stealthchop_threshold: 500

#####################################################################
#   Extruder
#####################################################################

[extruder]
step_pin: PB3
dir_pin: !PB4
enable_pin: !PD1
gear_ratio: 50:17               
microsteps: 16
full_steps_per_rotation: 200
rotation_distance: 13.760                                         
nozzle_diameter: 0.400
filament_diameter: 1.75
heater_pin: zstep:PC8
sensor_type: Generic 3950
sensor_pin: PA0
min_temp: 10
max_temp: 270
max_power: 1.0
min_extrude_temp: 170
max_extrude_only_distance: 500
max_extrude_only_velocity: 7200
max_extrude_only_accel: 800
#max_extrude_cross_section: 50.0
#control = pid
#pid_kp = 26.213
#pid_ki = 1.304
#pid_kd = 131.721
##  Try to keep pressure_advance below 1.0
#pressure_advance: 0.06
#pressure_advance_smooth_time: 0.030

[tmc2209 extruder]
uart_pin: PC11
tx_pin: PC10
uart_address: 3
interpolate: false
run_current: 0.850
sense_resistor: 0.110
stealthchop_threshold: 0
 

 

And the pinout to the Mini E3 V 3

 

[mvdveer]

Well - problem solved - don't ask me how exactly but this is the steps to rectify the errors:

Clarification/Terminology:

Main Board = Primary board (BTT SKR MINI E3 V3)

Z board = Secondary Board (BTT SKR MINI E3 V3)

 

HARDWARE CHANGES:

1. Reviewed all the connections and realised I had my B Motor plugged into the Z-Board (the one named zstep)

2. Changed the B Motor over to the main board: Ensured I had A-Motor, B-motor and E-Motor plugged into the main board

3. Realised my X- and Y-endstops where on the Z-Board, and the Z-Endstop on the main board,

4. Swapped X- and Y-Endstops to main board and Y-Endstop to the Z Board

SOFTWARE CHANGES:

1. Changed the naming of the Z Board mcu to [mcu z] to avoid spelling errors

2. Played around with the [TMC2209 xxxx] section and after numerous restarts trying to exclude or include various statements, this finally worked:

[tmc2209 stepper....]
uart_pin: PC11
#tx-pin: PC10
#select_pins:
uart_address: 0
interpolate: false
run_current: 0.8
sense_resistor: 0.110
stealthchop_threshold: 999999

The end result of another morning of fiddling and being the stubborn Frisia Dutchman I am at a working configuration. Even got the neopixels on both bed and hotend working.

Thanks for everyones input

Case Closed

 

[smirk]

Have you tried just dropping the "uart_address" out altogether (leave the software to figure that out for itself) ?

I'l need to check some of my configs to see if I bother with it, I'm sure it's caused me more grief than anything.

[smirk]

This is a small thing and might be complete nonsense but I note that your uart addresses on the default MCU are non-sequential (i.e. 0 & 3) perhaps if they were (0 & 1). That's utter hand-waving but I know some address systems assume there's no gaps in the address range.

[mvdveer]

7 hours ago, smirk said:

Have you tried just dropping the "uart_address" out altogether

Yes, but then I get Klipper complaining it needs a uart address:

[mvdveer]

7 hours ago, smirk said:

but I note that your uart addresses on the default MCU are non-sequentia

They are because of where the motors are connected.

XM=0, YM=1, ZMA, ZMB=2 and EM =3

Thus in flipper they need to reflect the connection and don't need to be in sequence.

[atrushing]

12 hours ago, mvdveer said:

Can't seem to solve this problem:

It's easy! Just clip the UART trace on the secondary board and jump PC11 over from the primary! What could go wrong?

[smirk]

Well done! Peserverence pays in the end