Problem Homing X and Y on coreXY

namenmalkav

im working on a corexy printer and i need to home first the Y axis and then the X

for doing the home of Y i need to move the X a little bit to clear some space for the X switch
my homey.g looks like this:

; homey.g
; called to home the Y axis
;
; generated by RepRapFirmware Configuration Tool v3.5.0-rc.2+6 on Thu Jan 25 2024 16:52:19 GMT-0300 (Argentina Standard Time)

; lift Z
G91 ; relative positioning
G1 H2 Z5 ; move Z relative to current position to avoid dragging nozzle over the bed
G90 ;absolute positioning

; home Y
G1 H2 X15 F2500
G1 H1 Y-450 F2500 ; coarse home in the -Y direction
G1 Y10 F3000 ; move back 5mm
G1 H1 Y-15 F300 ; fine home in the -Y direction
G1 H2 Z-5 F6000 ; lower Z again

the first issue i have is when i do the G1 H2 X15 F2500 the gantry moves in a diagonal instead of only X, the rest of the process is ok and the homing works fine

and when the big problems start is the homex.g that looks like this:

; homex.g
; called to home the X axis
;

; lift Z
G91 ; relative positioning
G1 H2 Z5 ; move Z relative to current position to avoid dragging nozzle over the bed
G90 ; absolute positioning

; home X
G1 H2 X15 F6000
G1 H1 X-450 F2600 ; coarse home in the -X direction
G1 X10 F6000 ; move back 5mm
G1 H1 X-15 F500 ; fine home in the -X direction
G1 H2 Z-5 F6000 ; lower Z again

the first move when run homex.g moves the y axis away so the rest of the process fails

both of the endstop switches are static and the gantry moves to them in both axis

where is my gcode failing?

Chriss

Are you sure that the wireing and the configuration is correct? The axis should not move diagonal when you move one axis only.
https://docs.duet3d.com/User_manual/Machine_configuration/Configuration_coreXY

jay_s_uk

@namenmalkav do you have M669 K1 in your config?

namenmalkav

@Chriss thank you that is helping i messed up with the M569 im working on that now.

@jay_s_uk yes i have i pre generated the config from the configuration tool

deckingman

@namenmalkav H2 is also individual motor moves for Delta and CoreXY machines. So on a CoreXY, using H2 with a G1 move for X or Y will cause only one motor to move, hence giving you 45 degree moves that you are seeing. Using H0 instead of H2 for the X and Y moves should do the trick.