X Max not being recognized

General Discussion
1

Basic Information:

Printer Model: Creality Ender 3 Max
MCU / Printerboard: TH3D EZBOARD V2
Host / SBC Raspberry PI 3b
klippy.log (690.8 KB)
klippy.log

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Describe your issue:

… When I try to home my printer, the head goes to the max x position and does not stop. The stepper motors keep turning. I tested the triggers and they all work on the min side (x, y, z) but max doesn’t work on x (probably doesn’t work on y or z either but one at a time). There is no physical switch on the max x side as there is on the min side.

I ran STEPPER BUZZ on all three axes and they all worked fine. My printer.cfg shows x position max to be 235 (which is low because my printer actually is 300). Running a GET POSITION I get this:

mcu: stepper_x:0 stepper_y:0 stepper_z:0
stepper: stepper_x:0.000000 stepper_y:0.000000 stepper_z:0.000000
kinematic: X:0.000000 Y:0.000000 Z:0.000000
toolhead: X:0.000000 Y:0.000000 Z:0.000000 E:0.000000
gcode: X:0.000000 Y:0.000000 Z:0.000000 E:0.000000
gcode base: X:0.000000 Y:0.000000 Z:0.000000 E:0.000000
gcode homing: X:0.000000 Y:0.000000 Z:0.000000

My assumptions is that max is only known as a coordinate after finding 0. But the printer doesn’t know where it is based off of the above. How do I make the printer go to X 0 and then go to, and know where X max is?

Then I need to do the same with Y and Z.

2

Hello @rb9999 !

Before the Klipper can recognise the max position, it has to be properly homed before.

It sounds the the steppers turn the wrong direction for homing.
Try with negating the dir_pins (lines 3 and 20)

[stepper_x]
step_pin = PB3
dir_pin = PD2
enable_pin = !PB5
microsteps = 16
rotation_distance = 40
endstop_pin = ^PC1
position_endstop = 0
position_max = 235
homing_speed = 50

[tmc2209 stepper_x]
uart_pin = PC11
tx_pin = PC10
run_current = 0.600
uart_address = 0

[stepper_y]
step_pin = PB8
dir_pin = PC13
enable_pin = !PC12
microsteps = 16
rotation_distance = 40
endstop_pin = ^PC2
position_endstop = 0
position_max = 235
homing_speed = 50

[tmc2209 stepper_y]
uart_pin = PC11
tx_pin = PC10
run_current = 0.600
uart_address = 1
3

Yep, that was it. When I was homing the X was going to the right and not the left. Flipped it, and it homed left and triggered. Did the same with Y and Z. Now I have to move on to the next topic, trying to get my TH3D EZABL working.

Thank you so much for your quick reply. Expect more from me! Haha.

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