Back again!
I made a quick change and added another PSU and separate board output and heater output. Nothing changed.

I have measured AC outlet; 240 @ 50 hz. / PSU output 24.4 volt (stable) / Board input connector 23.6 volt (stable)
Board Vin voltage while printing took my attention. It is not stable and jumps between 22.4v to 24 volt.
I stopped printing and vin voltage becomes stable at 24.1 volt. Turned on hotend 1 and Vin dropped to 23.3 v.
I will check all my wirings again. There could be loose connection as I believe there shouldn't be a drop in voltage like this.

@Phaedrux Yes. Never crashes normally.

@Phaedrux
Thanks. Sure.
homeall.g

G91                     ; relative positioning
G1 H2 Z5 F9000          ; lift Z relative to current position
G1 H1 X400 Y-420 F4800  ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X-5 Y5 F6000      ; go back a few mm
G1 H1 X400 Y-420 F2400   ; move slowly to X and Y axis endstops once more (second pass)
G90                     ; absolute positioning
G1 X0 Y0 F6000          ; go to first bed probe point and home Z
G30                     ; home Z by probing the bed

homexyz.g

;X
G91               ; relative positioning
G1 H2 Z5 F9000    ; lift Z relative to current position
G1 H1 X400 F2400  ; move quickly to X axis endstop and stop there (first pass)
G1 H2 X-5 F9000   ; go back a few mm
G1 H1 X400 F600   ; move slowly to X axis endstop once more (second pass)
G1 H2 Z5 F9000   ; lower Z again
G90               ; absolute positioning
;Y
G91               ; relative positioning
G1 H2 Z5 F9000    ; lift Z relative to current position
G1 H1 Y-440 F2400 ; move quickly to Y axis endstop and stop there (first pass)
G1 H2 Y5 F9000    ; go back a few mm
G1 H1 Y-440 F600  ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z5 F9000   ; lower Z again
G90               ; absolute positioning

;Z
G91              ; relative positioning
G1 H2 Z5 F9000   ; lift Z relative to current position
G90              ; absolute positioning
G1 X0 Y0 F9000 ; go to first probe point
G30              ; home Z by probing the bed

Gcode starting.. A bit messy but works for the first print.

;FLAVOR:RepRap
;TIME:3606
;Filament used: 0m, 16.7539m
;Layer height: 0.6
;MINX:0.905
;MINY:-61.185
;MINZ:0.5
;MAXX:65.709
;MAXY:66.413
;MAXZ:104.9
;Generated with Cura_SteamEngine 5.4.0
T1
M82 ;absolute extrusion mode
;M140 S63 ; start preheating the bed WITHOUT wait to what is set in Cura
;M104 S215 T0 ; start preheating hotend WITHOUT wait to what is set in Cura


G28 ; home


M190 S63 ; start heating the bed to what is set in Cura and WAIT
M109 S215  T1 ; start heating hotend to what is set in Cura and WAIT

;M98 P/Macros/Baslarken_Temizlik
M82 ;absolute extrusion mode
;G10 P1 S(material_print_temperature)
;T2
M83 ;relative extrusion mode
M83 ;relative extrusion mode
G1 F2700 E-3.5
;LAYER_COUNT:175
;LAYER:0
M107 P2
G0 F3600 X1.705 Y-57.985 Z0.5
;TYPE:SKIRT
G1 F2700 E3.5
G1 F1350 X1.745 Y-58.421 E0.07281
G1 X1.863 Y-58.842 E0.07271
G1 X2.056 Y-59.235 E0.07281

@Phaedrux
Totally no problem with the first job.
when I start another print, it is crashing after all the heaters are warmed up.

• Homing OK
• Warming heater and bed. OK
• Starting actual printing for the first prime FAIL.

So it cant find the first starting point.
Sometimes crashing towards the switches(not forcing) or opposite side of the switches.(forcing)

Thanks for the responses.
I recently added M0 to try if it fix problem.. Normally it was not there.
It is a custom built(2020) printer but this problem occured after I set the origin bed at center.(few months ago)
Normally the bed size is Y430 mm x X395 mm x Z510 mm.

I have stop.g file with default settigns.(no gcode)
Here is cure start gcode

M190 S{material_bed_temperature} ; start heating the bed to what is set in Cura and WAIT
M109 S{material_print_temperature}  T1 ; start heating hotend to what is set in Cura and WAIT
G28 ; home

Could it be a wrong axis limitation? I've two extruder (side by side.)
M208 X-215:180, Y-215:215 Z510

Here is bed.g file

M561 ; clear any bed transform
G29  ; probe the bed and enable compensation

Hi!

I need to have to restart the mainboard to start a new print after finishing one.
The printhead crashes mostly because the printhead is trying to go to outside of the print area.(no problem with first job)
I think there is confusion about finding the starting point.
This problem occured after I changed to origin at center.

Here is my config & endcode

 General preferences
G90                                             ; send absolute coordinates...
M83                                             ; ...but relative extruder moves
M550 P"HBOT"                                    ; Set machine name
M552 S1                                         ; Enable network


; Network
M552 S1                                         ; enable network
M586 P0 S1                                      ; enable HTTP
M586 P1 S0                                      ; disable FTP
M586 P2 S0                                      ; disable Telnet

; Drives
M569 P1 S1                                      ; physical drive 0 goes backwards
M569 P1 S0                                      ; physical drive 1 goes backwards
M569 P2 S1                                      ; physical drive 2 goes forwards
M569 P3 S0                                      ; physical drive 3 goes forwards
M569 P4 S1                                      ; physical drive 4 goes forwards
M584 X0 Y1 Z2 E4:3                              ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1                      ; configure microstepping with interpolation
M92 X80.70 Y80.80 Z400.50 E104.50:104.50          ; set steps per mm
M566 X700.00 Y700.00 Z60.00 E500.00:500.00      ; set maximum instantaneous speed changes (mm/min)
M203 X20000 Y20000 Z300.00 E4000:4000           ; set maximum speeds (mm/min)
M201 X1500 Y1500 Z60.00 E500.00:500.00          ; set accelerations (mm/s^2)
M906 X1200 Y1200 Z1200 E1200:1200 I30           ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                         ; Set idle timeout
M572 D0:1 S0.23:0.23					        ; Linear advance

; Axis Limits
M208 X-215:180, Y-215:215 Z510
;M208 X-216:184, Y-215:215
;M208 X0 Y0 Z0 S1                                ; set axis minima
;M208 X400 Y400 Z500 S0                          ; set axis maxima

; Endstops
M574 X2 S1 P"xstop"                             ; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                             ; configure switch-type (e.g. microswitch) 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.heater7"                          ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H5 F150 T9000             ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y0 Z1.83                            ; set Z probe trigger value, offset and trigger height
M557 X-180:200 Y-180:200 S170                   ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138  ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                           ; create bed heater output on bedheat and map it to sensor 0
M307 H0 R0.566 K0.257:0.000 D5.48 E1.35 S1.00 B0    ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0                                         ; map heated bed to heater 0
M143 H0 S120                                    ; set temperature limit for heater 0 to 120C

M308 S1 P"e0temp" Y"thermistor" T99962 B4810 C8.2e-8   ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                            ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 B0 R3.186 C220.6 D8.84 S1.00 V23.8      ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S280                                    ; set temperature limit for heater 1 to 280C
M308 S2 P"e1temp" Y"thermistor" T99962 B4810 C8.2e-8    ; configure sensor 2 as thermistor on pin e1temp
M950 H2 C"e1heat" T2                            ; create nozzle heater output on e1heat and map it to sensor 2
M307 H2 B0 R2.431 C255.4 D7.39 S1.00 V23.9      ; disable bang-bang mode for heater  and set PWM limit
M143 H2 S280                                    ; set temperature limit for heater 2 to 280C

; Fans
M950 F0 C"fan0" Q500                            ; create fan 1 on pin fan1 and set its frequency
M106 P0 S0 H-1                                  ; set fan 0 value. Thermostatic control is turned on
M950 F1 C"fan1" Q500                            ; create fan 0 on pin fan0 and set its frequency
M106 P1 S1 H1:2 T45                             ; set fan 1 value. Thermostatic control is turned off
M950 F2 C"fan2" Q500                            ; create fan 2 on pin fan2 and set its frequency
M106 P2 S0 H-1                                  ; set fan 2 value. Thermostatic control is turned off

; Tools
M563 P0 S"SOL" D0 H2 F0                         ; define tool 0
G10 P0 X0 Y0 Z0                                 ; set tool 0 axis offsets
G10 P0 R0 S0                                    ; set initial tool 0 active and standby temperatures to 0C
M563 P1 S"SAĞ" D1 H1 F2                         ; define tool 1
G10 P1 X31.45 Y0 Z0                             ; set tool 1 axis offsets
G10 P1 R0 S0                                    ; set initial tool 1 active and standby temperatures to 0C

endcode

M104 S0
M140 S0
M107
G91
G1 E-1 F300
G1 Z+0.5 E-5 X-20 Y-20 F9000.00
G90
G28 X0 Y0
M290 R0 S0
M400

M84
M0

What could be wrong? First print no problem. Second job crash.

@phaedrux said in weird homing behavior:

What kind of endstops are they?

Increase the distance of your homing moves to be larger than the full size of your bed. Are you have it now, it would only be able to home successfully if you start from the center of your bed.

Are you sure your axis limits are correctly sized?

Is this a corexy?

@phaedrux said in weird homing behavior:

What kind of endstops are they?

Increase the distance of your homing moves to be larger than the full size of your bed. Are you have it now, it would only be able to home successfully if you start from the center of your bed.

Are you sure your axis limits are correctly sized?

Is this a corexy?

• Basic micro switches

• Exactly. It is successfully homing if the head starts from the center of the bed. If not, XY sw may trigger randomly. I tried to increase distance but not remember if it was larger than the bed size. I will try it again. Thanks

• Yes with some margin.

• Dual Y/Z/E, -H Bot cartesian. Fresh built.
  

Video is better to explain the problem;
https://youtu.be/KenRduFPMmI

I don't know why/how X triggers before it hits the switch but I think I may be trying to home the printer where it shouldn't be? X/Y switches works without any problem. Center origin X0 Y0 is the physical origin center point of the bed. The bed size 500mm x 500 mm but the axis movement limits X400 Y430 Z500 mm

Here is my config.g code

; Configuration file for Duet WiFi (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.10 on Sun Nov 28 2021 20:59:46 GMT+0300 (GMT+03:00)

; General preferences
G90                                             ; send absolute coordinates...
M83                                             ; ...but relative extruder moves
M550 P"DUET"                                    ; Set machine name
M552 S1                                         ; Enable network


; Network
M552 S1                                         ; enable network
M586 P0 S1                                      ; enable HTTP
M586 P1 S0                                      ; disable FTP
M586 P2 S0                                      ; disable Telnet

; Drives
M569 P1 S1                                      ; physical drive 0 goes backwards
M569 P1 S0                                      ; physical drive 1 goes backwards
M569 P2 S1                                      ; physical drive 2 goes forwards
M569 P3 S1                                      ; physical drive 3 goes forwards
M569 P4 S0                                      ; physical drive 4 goes forwards
M584 X0 Y1 Z2 E3:4                              ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1                      ; configure microstepping with interpolation
M92 X80.70 Y80.80 Z400.50 E100.00:100.00        ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E750.00:750.00      ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z200.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z60.00 E750.00:750.00      ; set accelerations (mm/s^2)
M906 X1200 Y1200 Z1200 E1200:1200 I30           ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                         ; Set idle timeout
;M572 D0:1 S0.25					                ; Linear advance

; Axis Limits
M208 X-216:184, Y-215:215


; Endstops
M574 X2 S1 P"xstop"                             ; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                             ; configure switch-type (e.g. microswitch) 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.heater7"                          ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H5 F150 T9000             ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y0 Z1.45                             ; set Z probe trigger value, offset and trigger height
M557 X-180:200 Y-180:200 S170                       ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138  ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                           ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B0 R0.588 C280.3 D7.46 S1.00            ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0                                         ; map heated bed to heater 0
M143 H0 S120                                    ; set temperature limit for heater 0 to 120C

M308 S1 P"e0temp" Y"thermistor" T99962 B4810 C6.7e-8   ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T2                            ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 B0 R2.949 C172.9:117.9 D5.61 S1.00 V23.9 ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S280                                    ; set temperature limit for heater 1 to 280C
M308 S2 P"e1temp" Y"thermistor" T99962 B4810 C6.7e-8   ; configure sensor 2 as thermistor on pin e1temp
M950 H2 C"e1heat" T1                            ; create nozzle heater output on e1heat and map it to sensor 2
M307 H2 B0 R4.803 C124.8:96.0 D9.61 S1.00 V22.8 ; disable bang-bang mode for heater  and set PWM limit
M143 H2 S280                                    ; set temperature limit for heater 2 to 280C

; Fans
M950 F1 C"fan1" Q500                            ; create fan 0 on pin fan0 and set its frequency
M106 P1 T45 S1 H1:2                             ; set fan 1 value. Thermostatic control is turned off
M950 F0 C"fan0" Q500                            ; create fan 1 on pin fan1 and set its frequency
M106 P0 S0 H-1                                  ; set fan 0 value. Thermostatic control is turned on
M950 F2 C"fan2" Q500                            ; create fan 2 on pin fan2 and set its frequency
M106 P2 S0 H-1                                  ; set fan 2 value. Thermostatic control is turned off

; Tools
M563 P0 S"SOL" D0 H1 F0                        ; define tool 0
G10 P0 X0 Y0 Z0                                 ; set tool 0 axis offsets
G10 P0 R0 S0                                    ; set initial tool 0 active and standby temperatures to 0C
M563 P1 S"SAĞ" D1 H2 F2                        ; define tool 1
G10 P1 X0 Y0 Z0                                 ; set tool 1 axis offsets
G10 P1 R0 S0                                    ; set initial tool 1 active and standby temperatures to 0C

; Custom settings are not defined

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.3.10 on Sun Nov 28 2021 20:59:47 GMT+0300 (GMT+03:00)
G91                     ; relative positioning
G1 H2 Z5 F9000          ; lift Z relative to current position
G1 H1 X200 Y-220 F2400  ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X-5 Y5 F6000       ; go back a few mm
G1 H1 X200 Y-220 F600   ; move slowly to X and Y axis endstops once more (second pass)
G90                     ; absolute positioning
G1 X0 Y0 F6000          ; go to first bed probe point and home Z
G30                     ; home Z by probing the bed

; homex.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.3.10 on Sun Nov 28 2021 20:59:47 GMT+0300 (GMT+03:00)
G91               ; relative positioning
G1 H2 Z5 F9000    ; lift Z relative to current position
G1 H1 X185 F2400  ; move quickly to X axis endstop and stop there (first pass)
G1 H2 X-5 F9000   ; go back a few mm
G1 H1 X185 F600   ; move slowly to X axis endstop once more (second pass)
G1 H2 Z5 F9000   ; lower Z again
G90               ; absolute positioning

@danzaywer I did it. Powered the board with adjustable power supply to see the current it draws. 0.18A at idle and 1.80A when hotend is on.
Ac outlet 230volt stable. PSU output 24.2volt stable. Board power input connector 24.0 v stable.

@percar It is in a PiD mode. I'm using two PSU. The 24V psu is for the board, 12V psu is for leds and 12v fans around enclosure. Filament spool made by a turntable. It is a free spinning bearing.

@rjenkinsgb I understood what you mean. I tried it. Nothing seem works really right now.

I don't know if this macro shows a layer height change or over extruded layer? I think layer height is different than others.
Anyway I'm tired. Don't shut off the heater bed and problem is solved.

@jens55 said in Turning of the SSR heated bed immediately kicks the printed part:

@secure, I think you have more fundamental errors than the what you suspect is caused by the heated bed. You are correct that voltage should not fluctuate like that - it should be rock steady with a decent power supply (Meanwell but not a Meanwell clone)
This might possibly be the reason why the rest of the print looks quite crappy (sorry). The walls are all over the place and are just terrible.
I would try replacing the power supply first .... but I am afraid that there might be other gremlins at work that cause the poor walls. I suppose they could be just over extruded .... hard to tell from here.

Yes it is crappy I have some errors and trying find the possible causes.
I think it is hardware related error because I had recently(3 weeks ago) printed this part with the same printer.

Not a Meanwell but I have 1300 watt @24 volt PSU lying around here. I don't think it is related with PSU because it's voltage output is stable. I had changed a lot of things on that printer for the last 3 weeks. One another suspect is the twisted CAT7 23 awg cables that I used to for heat cartidges. Like @rjenkinsgb said I may need to rewire those cables. Thanks for the inputs.

Back again!
I made a quick change and added another PSU and separate board output and heater output. Nothing changed.

I have measured AC outlet; 240 @ 50 hz. / PSU output 24.4 volt (stable) / Board input connector 23.6 volt (stable)
Board Vin voltage while printing took my attention. It is not stable and jumps between 22.4v to 24 volt.
I stopped printing and vin voltage becomes stable at 24.1 volt. Turned on hotend 1 and Vin dropped to 23.3 v.
I will check all my wirings again. There could be loose connection as I believe there shouldn't be a drop in voltage like this.