Please help corexy can not home zero

General Discussion
1

The physical structure of my MACHINE is like this PIC

image
image1725×1747 97 KB

HERE IS THE STEPPER CONFIGITION

[printer]

kinematics:corexy
max_velocity: 200
max_accel: 500
max_z_velocity: 50
max_z_accel: 200
[stepper_x]
step_pin: PA4
dir_pin:PA5
enable_pin:!PA6
microsteps: 8
rotation_distance: 40

endstop_pin: !PB4
position_endstop: 0
position_max: 145
homing_speed: 10
[stepper_y]
step_pin: PA7
dir_pin:PB0
enable_pin:!PA6
microsteps: 16
rotation_distance: 64.8
endstop_pin: !PB5
position_endstop: 0
position_max: 200
homing_speed: 10

homing_positive_dir:True
position_endstop: 0.2
position_max: 30
homing_speed: 20

Now I’m facing a problem that I can’t correctly HOME to zero. The specific situation is as follows:

when I set the motor DIR direction

dir_pin:PA5 dir_pin:PB0

OR

dir_pin: PA5 dir_pin: !PB0

HOME zero X , the print head will move towards the x+ direction of the physical machine,

HOME zero Y , the print head will move towards the Y+ direction of the physical machine.

when I set the motor DIR direction

dir_pin:!PA5 dir_pin:!PB0

OR

dir_pin: !PA5 dir_pin: PB0

HOME zero X , the print head will move towards the Y- direction of the physical machine,

HOME zero Y , the print head will move towards the X- direction of the physical machine,

SO PLEASE HELP ME ,

2

I think you have to swap the motor connectors on the board and then try different directions.
There is a guide for Vorons where it says what is wrong for each case:

image
image800×565 63.2 KB

You printer is rotated compared to a Voron but the basics are the same.

3

I HAVE TYRED swap the motor connectors and all four different combinations of dir pin., still can not move toward the correct direction

4

Ah just saw you have the wrong config or something thrown together:

homing_positive_dir:True
position_endstop: 0.2
position_max: 30
homing_speed: 20

First is, there is only a travel of 30 mm and that overwrites the former 200 mm.
Second and culprit here: homing_positive_dir:True That causes homing to max and not to 0.
So just remove that and check the whole config section for stepper_y.

5

“position_max: 30 - I’m not sure what this is for as it seems to have no effect. When homing, the travel distance is at least 10cm. I’ve tried set
homing_positive_dir to false initially, but it didn’t work. then I set it to true, but it still didn’t work.”

6

If you want to home to 0 you need to comment or delete homing_positive_dir:True so it defaults to false.
See: Configuration reference - Klipper documentation

If it is still not working you should check with different dir-pin states.

If you have a good eye you can use stepper_buzz to check for the right initial direction - see:
https://www.klipper3d.org/G-Codes.html?h=stepper_b#stepper_buzz

Or you put your print head to the center of the gantry and use SET_KINEMATIC_POSITION to reset position and then force move stepper x and y for some mm to check what directions are driven into.
https://www.klipper3d.org/G-Codes.html?h=stepper_b#force_move_1

Get your stepper config sections right and check from the base again.
Additionally for next topics please upload the whole klippy.log as requested.

7

[force_move]
enable_force_move: True

[respond]
[gcode_macro DIREY]
description: y
gcode:

FORCE_MOVE STEPPER=stepper_y DISTANCE=20 VELOCITY=10

[gcode_macro DIRE_x]
description: A
gcode:

FORCE_MOVE STEPPER=stepper_x DISTANCE=20 VELOCITY=10

[gcode_macro DIRE_z]
description: z
gcode:

FORCE_MOVE STEPPER=stepper_z DISTANCE=20 VELOCITY=10

I’ve already tried setting all of those, 。 There are no issues with the motor’s wiring and controlling the direction of its operation.

but homing_positive_dir:True or false There’s no noticeable impact.

8

Please upload your latest klippy.log here.
Best is to roll it over so just the last instance is logged.

9

klippy.log (5.5 MB) i do not know how to to roll it over

10

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