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@Fisher said in Another mirrored core xy question:

M574 Y1 S2

i made a mistake in my op but cant edit it as its getting flagged as spam for some reason i am changing
** M574 Y2 S1 **

solved: incorectly wired endstops... i knew it would be somthing silly, thanks all the same.

Im currently commisioning my new printer, all movemnts seem to working corectly except the y axis is mirrored.

This image shows how i want the movemet configured as well as the location of the end stops.

my current config (i have removed non relevent sections):

; generated by RepRapFirmware Configuration Tool v3.1.10 on Wed Dec 23 2020 01:01:14 GMT+0000 (Greenwich Mean Time)

; General preferences
G90                                            ; send absolute coordinates...
M83                                            ; ...but relative extruder moves
M550 P"My Printer"                             ; set printer name
M669 K1                                        ; select CoreXY mode

; Drives
M569 P0 S1                                     ; physical drive 0 goes forwards 
M569 P1 S1                                     ; physical drive 1 goes forwards 
M569 P2 S1                                     ; physical drive 2 goes forwards 
M569 P3 S1                                     ; physical drive 3 goes forwards 
M584 X0 Y1 Z2 E3                               ; set drive mapping
M350 X256 Y256 Z16 E8 I1                       ; configure microstepping with interpolation
M92 X2560.00 Y2560.00 Z1600.00 E400.00         ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E2000.00           ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z400.00 E4800.00      ; set maximum speeds (mm/min)
M201 X800 Y800 Z20.00 E2000.00                 ; set accelerations (mm/s^2)
M906 X800 Y800 Z650 E1300 I30                  ; set motor currents (mA) and motor idle factor in per cent
M84 S10                                        ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1                               ; set axis minima
M208 X330 Y270 Z300 S0                         ; set axis maxima

; Endstops
M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                            ; configure active-high endstop for low end on Y via pin ystop 
M574 Z1 S2                                     ; configure Z-probe endstop for low end on Z

; Z-Probe
M950 S0 C"exp.heater3"                         ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H3 F120 T6000            ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X-35 Y0 Z3.4			       ; set Z probe trigger value, offset and trigger height
M557 X25:275 Y0:250 S50                        ; define mesh grid

homeall.g:

G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 H1 X-330 Y-270 F3600 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X-330             ; home X axis
G1 H1 Y-270             ; home Y axis
G1 X5 Y5 F6000          ; go back a few mm
G1 H1 X-330 F360        ; move slowly to X axis endstop once more (second pass)
G1 H1 Y-270             ; then move slowly to Y axis endstop
G90                     ; absolute positioning
G1 X50 Y15 F6000        ; go to first bed probe point and home Z
G30                     ; home Z by probing the bed

homex.g:

G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 X-330 F3600 ; move quickly to X axis endstop and stop there (first pass)
G1 X5 F6000       ; go back a few mm
G1 H1 X-330 F360  ; move slowly to X axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning

homey.g:

G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Y-270 F3600 ; move quickly to Y axis endstop and stop there (first pass)
G1 Y5 F6000       ; go back a few mm
G1 H1 Y-270 F360  ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning

i belive i have to hange the following :

• M669 y-1
• M574 Y1 S2
• change the movments in homeall and homey to positive movments

ive tried this and the movment directions seem correct but i get strange behavior when homing where the x axis tries to continue moving beyond the end stop limit.

Am i making the correct changes or am i missing somthing, TIA.