Question Switchwire homing and travel distance issues.

[Rusty105]

Just got the SW moving and I think I have some config issues. At the moment I am using X and Y end stop switches for the end stops.

First issue, Home seems to be backwards from where it should be. When I home X&Y it goes to the back right corner of the build plate. Shouldn't it be the left front?

Second Issue, When I command it to move 100mm in any direction, X,Y, or Z it seems to move almost twice that.

Once I have all the axis homed I can use the + / - move commands from the Klipper dashboard , and it appears to move in the right direction. A "+" move moves the print head to the right, moves the print head up, and will move the bed towards the front of the printer. Only Z appears to be correct, in that it moves up when I give it a positive move command.


Attached is portion of my config file, any help is appreciated. Controller board is a BTT Manta MP5.

[printer]
kinematics: corexz
max_velocity: 30
max_accel: 100
max_z_velocity: 5
max_z_accel: 10


[stepper_x]
step_pin: PB12
dir_pin: PB11
enable_pin: !PA8
microsteps: 16
rotation_distance: 40
# endstop_pin: ^PD3 # on Nitehawk Board
position_endstop: 250
position_max: 250
position_min: 0
homing_speed: 10

[stepper_y]
step_pin: PC6
dir_pin: PC7
enable_pin: !PA9
microsteps: 16
rotation_distance: 40
endstop_pin: ^PC3
position_endstop: 242
position_max: 242
homing_speed: 20

[stepper_z]
step_pin: PC8
dir_pin: PC9
enable_pin: !PA15
microsteps: 16
rotation_distance: 40
endstop_pin: probe:z_virtual_endstop #^PC2 # On Nitehawk Board (Induction Sensor or Klicky)
position_max: 250
position_min: -3
homing_speed: 10
rotation_distance: 40
endstop_pin: probe:z_virtual_endstop #^PC2 # On Nitehawk Board (Induction Sensor or Klicky)
position_max: 250
position_min: -3
homing_speed: 10

 

[shiftingtech]

Regarding where its homing to: would homing to the front left make any sense, given where the endstop switches are physically located?

Regarding double length travels: where are your tmc2209 config sections?

 

[Rusty105]

Regarding where its homing to: would homing to the front left make any sense, given where the endstop switches are physically located?

Regarding double length travels: where are your tmc2209 config sections?

I am just used to having my MK3s home into the left front of the bed, that way when it does the Z home the inductive sensor is over the steel sheet build plate. As my SW stands now the inductive probe is over open space once the X & Y home. Can I modify the "homing" macros so that a Z home triggers an X&Y home, moves the bed to a good spot, then homes the Z?

I don't have any tmc2209 config sections, and I thin that may be part of the issue.

Klipper is new for me, so I am still learning.

Thanks!


Also, there was a copy/paste error in my confih above, correct is below

[printer]
kinematics: corexz
max_velocity: 30
max_accel: 100
max_z_velocity: 5
max_z_accel: 10


[stepper_x]
step_pin: PB12
dir_pin: PB11
enable_pin: !PA8
microsteps: 16
rotation_distance: 40
# endstop_pin: ^PD3 # on Nitehawk Board
position_endstop: 250
position_max: 250
position_min: 0
homing_speed: 10

[stepper_y]
step_pin: PC6
dir_pin: PC7
enable_pin: !PA9
microsteps: 16
rotation_distance: 40
endstop_pin: ^PC3
position_endstop: 242
position_max: 242
homing_speed: 20

[stepper_z]
step_pin: PC8
dir_pin: PC9
enable_pin: !PA15
microsteps: 16
rotation_distance: 40
endstop_pin: probe:z_virtual_endstop #^PC2 # On Nitehawk Board (Induction Sensor or Klicky)
position_max: 250
position_min: -3
homing_speed: 10

 

[shiftingtech]

May i ask then, why you aren't starting from one of our provided configs, which would provide both the tmc2209 sections (yes, their absence almost certainly explains the distance issue: drivers aren't in the expected microstepping mode), and the safe_z_home (which is the answer to the "home z in a reasonable location issue")

 

[Rusty105]

May i ask then, why you aren't starting from one of our provided configs, which would provide both the tmc2209 sections (yes, their absence almost certainly explains the distance issue: drivers aren't in the expected microstepping mode), and the safe_z_home (which is the answer to the "home z in a reasonable location issue")

I didn't see one that used a Manta MP5. I would appreciate if you posted the link to the starter configs.
Thanks again!

 

[shiftingtech]

Eh, that's a pretty good reason actually. There isn't one for m5p. Still, I think you'd find value in referencing something like the an skr mini config

Safe_z_home can be copied as is, and the tmc sections should be able to come over, just fixing the pin assignments. And you might find other useful things as well.

 

[Rusty105]

Ok, Thanks everyone.....

It is working correctly now. I printed two Voron Design Cubes, not very well as the extruder needs calibration, but I should have that sorted out shortly. One thing I will say..... My MK3S+ with MMU3 may be up for retirement once the Switchwire is dialed in. It is sooooo much faster. The MK3S is nice, solid, it works , just not fast. Once I figure out a MMU solution for the Switchwire, I may retire the MK3S.



A few things for others to look at if you are having a similar issue.
1) Make sure all the settings are the same for the X and Z motors; rotation_distance, microsteps, full_steps_per_rotation (if needed)
2) Make sure the driver config is included and correct ( The tmc2209 section under each motor section)


Thanks again