@Phaedrux I'll check it out. thank you

@Phaedrux yeah I've seen that. I have a creativity elf printer with 2 lead screws that each have an endstop. I was trying to get both of the endstops to work. so far I have the both motors moving independently but only one endstop is recognized.

@Phaedrux I made the changes you suggested. thank you. Any idea on how to get both endstops to work? right now if I trigger the endstop that is recognized both motors stop.

good morning @Phaedrux

M98 P"config.g"
HTTP is enabled on port 80
FTP is disabled
TELNET is disabled
Error: in file macro line 62 column 33: M106: expected number after 'H'

m122
=== Diagnostics ===
RepRapFirmware for STM32F4 based Boards (fly_super8) version 3.4.4_102 (2022-11-08 14:19:10) running on STM32F4
Board ID: P10J3-0417A-G83VJ-6N9DA-H6ATU-70000
Used output buffers: 3 of 40 (13 max)
=== RTOS ===
Static ram: 19480
Dynamic ram: 76508 of which 164 recycled
Never used RAM 33892, free system stack 214 words
CCMRam static ram: 16760 dynamic ram: 19076 free ram 29696
Tasks: NETWORK(notifyWait,166.5%,261) HEAT(notifyWait,0.5%,347) Move(notifyWait,0.1%,316) FSWRITE(notifyWait,0.0%,474) MAIN(running,303.1%,397) IDLE(ready,0.3%,29), total 470.4%
Owned mutexes: WiFi(NETWORK)
=== Platform ===
Last reset 13:26:44 ago, cause: software
Last software reset at 2022-12-05 20:07, reason: User, GCodes spinning, available RAM 33892, slot 2
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Step timer max interval 0
MCU temperature: min 46.1, current 55.1, max 59.1
Supply voltage: min 24.0, current 24.2, max 24.2, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: 
Driver 1: 
Driver 2: 
Driver 3: 
Driver 4: 
Driver 5: 
Driver 6: 
Driver 7: 
Driver 8: 
Driver 9: 
Driver 10: 
Driver 11: 
Driver 12: 
Driver 13: 
Date/time: 2022-12-06 09:34:20
Slowest loop: 6.40ms; fastest: 0.07ms
=== Storage ===
Free file entries: 10
SD card 0 detected
SD card longest read time 5.0ms, write time 1.2ms, max retries 0
=== Move ===
DMs created 83, segments created 3, maxWait 555503ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 14, completed 14, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters 0 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty
=== Network ===
Slowest loop: 26.20ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(2) HTTP(0) HTTP(0) FTP(0)
HTTP sessions: 1 of 8
Uploads/Errors: 1/0
= WiFi =
Network state is active
WiFi module is connected to access point 
Failed messages: pending 0, notready 0, noresp 0
Bad header: 0/0
WiFi firmware version 1.27-01S32-D
WiFi MAC address ##############
WiFi Vcc 0.00, reset reason Power up
WiFi flash size 0, free heap 124388
WiFi IP address ##########
WiFi signal strength -51dBm, mode 802.11n, reconnections 0, sleep mode none
Clock register 00002003
Socket states: 0 0 0 0 0 0 0 0

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.4.0-LPC-STM32+4 on Sat Dec 03 2022 13:21:04 GMT-0600 (Central Standard Time)
G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 H1 X-315 Y-315 F500 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X-315             ; home X axis
G1 H1 Y-315             ; home Y axis
G1 X5 Y5 F6000          ; go back a few mm
G1 H1 X-315 F360        ; move slowly to X axis endstop once more (second pass)
G1 H1 Y-315             ; then move slowly to Y axis endstop
G1 H2 Z325 F360         ; move Z up stopping at the endstop
G90                     ; absolute positioning
G92 Z320                ; set Z position to axis maximum (you may want to adjust this)

; Uncomment the following lines to lift Z after probing
;G91                    ; relative positioning
;G1 Z5 F100             ; lift Z relative to current position
;G90                    ; absolute positioning

; homex.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.4.0-LPC-STM32+4 on Sat Dec 03 2022 13:21:04 GMT-0600 (Central Standard Time)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 X-315 F1800 ; move quickly to X axis endstop and stop there (first pass)
G1 X5 F6000       ; go back a few mm
G1 H1 X-315 F360  ; move slowly to X axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning

; homey.g
; called to home the Y axis
;
; generated by RepRapFirmware Configuration Tool v3.4.0-LPC-STM32+4 on Sat Dec 03 2022 13:21:04 GMT-0600 (Central Standard Time)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Y-315 F500 ; move quickly to Y axis endstop and stop there (first pass)
G1 Y5 F6000       ; go back a few mm
G1 H1 Y-315 F360  ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.4.0-LPC-STM32+4 on Sat Dec 03 2022 13:21:05 GMT-0600 (Central Standard Time)
G91              ; relative positioning
G1 H2 Z5 F6000   ; lift Z relative to current position
G1 H1 Z325 F1800 ; move Z up until the endstop is triggered
G92 Z320         ; set Z position to axis maximum (you may want to adjust this)

; Uncomment the following lines to lift Z after probing
;G91             ; relative positioning
;G1 Z5 F100      ; lift Z relative to current position
;G90             ; absolute positioning

Hey guys, I have 2 endstop questions.

corexy creativity elf printer
dual lead screw with endstops
mellow super 8 board
RRF3

1. I have a dual lead screw corexy 3d printer that uses endstops and so far only one works. I looked up M574 and tried the example for using independent endstop switches for z axis but I must be missing something. when I run M119 one endstop is recognized but the other shows as "z probe: at min stop"
   I added M569 and mapped the second Z motor with M584

2. my y endstop doesnt trigger very fast and the gantry crashes into it and the motors skip for half a second. How do I get it to trigger faster?

; Configuration file for Fly Super8 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.4.0-LPC-STM32+4 on Sat Dec 03 2022 13:21:04 GMT-0600 (Central Standard Time)

; General preferences
G90                                                   ; send absolute coordinates...
M83                                                   ; ...but relative extruder moves
M550 P"elf 1"                                         ; set printer name
M669 K1                                               ; select CoreXY mode

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

; Drives
M569 P0 S0                                            ; physical drive 0 "X" goes forwards using default driver timings
M569 P1 S0                                            ; physical drive 1 "Y" goes forwards using default driver timings
M569 P2 S1                                            ; physical drive 2 "E" goes forwards using default driver timings
M569 P3 S0                                            ; physical drive 3 "Z" goes backwards using default driver timings
M569 P4 S0                                            ; physical drive 3 "Z1" goes backwards using default driver timings
M584 X0 Y1 Z3:4 E3                                    ; set drive mapping #=drive number
M350 X16 Y16 Z16 E16 I1                               ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E415.00                     ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E1200.00                  ; set maximum instantaneous speed changes (mm/min)
M203 X24000.00 Y24000.00 Z180.00 E1200.00             ; set maximum speeds (mm/min)
M201 X3500.00 Y3500.00 Z20.00 E2000.00                ; set accelerations (mm/s^2)
M906 X1100 Y1100 Z900 E650 I30                        ; set motor currents (mA) and motor idle factor in per cent
M84 S1800                                             ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1                                      ; set axis minima
M208 X310 Y310 Z320 S0                                ; set axis maxima

; Endstops
M574 X1 S1 P"io2"                                     ; configure switch-type (e.g. microswitch) endstop for low end on X via pin io2
M574 Y1 S1 P"io1"                                     ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin io1
;M574 Z0 S1 P"io3"                                     ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin io3
;M574 Z1 S1 P"io0"                                     ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin io0
M574 Z1 S1 P"io3+io0"                               ; Z axis with two motors, individual min endstops, active high

; Z-Probe
;M558 P0 H5 F120 T6000                                 ; disable Z probe but set dive height, probe speed and travel speed
;M557 X15:215 Y15:195 S20                              ; define mesh grid

; Heaters
M308 S0 P"ADC_0" Y"thermistor" T100000 B4092          ; configure sensor 0 as thermistor on pin ADC_0
M950 H0 C"bed" T0                                     ; create bed heater output on bed and map it to sensor 0
M307 H0 B0 S1.00                                      ; disable 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
M143 H0 S120                                          ; set temperature limit for heater 0 to 120C
M308 S1 P"ADC_5" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 1 as thermistor on pin ADC_5
M950 H1 C"heat0" T1                                   ; create nozzle heater output on heat0 and map it to sensor 1
M307 H1 B0 S1.00                                      ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S320                                          ; set temperature limit for heater 1 to 320C

; Fans
M950 F0 C"fan0" Q500                                  ; create fan 0 on pin fan0 and set its frequency
M106 P0 C"Part Cooling Fan" S0 H T45                  ; set fan 0 name and value. Thermostatic control is turned on
M950 F1 C"fan1" Q500                                  ; create fan 1 on pin fan1 and set its frequency
M106 P1 C"Hotend Fan" S0.01 H1 T45                    ; set fan 1 name and value. Thermostatic control is turned on

; Tools
M563 P0 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

; Custom settings are not defined

; Miscellaneous
M575 P1 S0 B57600                                     ; enable support for Flymaker 4.3/7" screen

I finally figured it out. The grub screw on my bondtech extruder was loose. The stepper motor would spin shaft assembly but the drive gear would only turn sporadically. I put some locktite on the grubscrew, put it all back together and its working great and the E steps are the same as before! For future reference if you see the large gear spinning on the shaft assembly and are getting inconsistent sporadic extrusion check to see if a screw is loose.

Yea, it's weird. Both motors are 0.9 deg. Per Bondtech's website a 1.7 deg stepper motor should be around 415 steps/mm. I was at 840 for the old slimline motor which is a 0.9 deg stepper motor. That makes sense.
Here is my process:
-using PETG
-set my extruder temp to 235°C
-measured 100mm of filament and marked it
-On the duet WiFi I opened the extrusion menu
-selected 100mm
-selected 5mm/sec
-selected extrude
-only 50mm was extruded
-doubled the value and iterated until I was able to extrude 100mm

The final e step value was 1560.

Other than the fact that it's weird and I want to figure out WHY this is happening is there any negative impact to having the steps so high?

I just changed extruder motors and my e steps doubled. Any ideas why that happened? Does it even matter?

Here is my setup.
firmware: Duet WiFi 1.0 or 1.01
Firmware version: 2.02(RTOS) (2018-12-24b1)
WiFi Server Version 1.23
Web interface Version 1.22.6

Old motor: E3D Slimline stepper motor (0.9 deg)
Bondtech BMG extruder
Microstepping 16x
e steps 840
current 1400

New motor: LDO pancake motor part number LDO-42STH25-140MAC (0.9 deg)
Bondtech BMG extruder
microstepping 16x
e steps 1560
current 1200

I didn't change the wiring.

It should have been a drop in replacement. I'm stumped why I needed to almost double my e steps.

here is some of the config file

; Axis and motor configuration
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X80 Y80 Z3230 ; Set steps per mm
M92 E1560 ; Set extruder steps/mm
M201 X500 Y500 Z250 E600 ; Set accelerations (mm/s^2)
M203 X10000 Y10000 Z200 E2000 ; Set maximum speeds (mm/min)
M566 X200 Y200 Z20 E500 ; Set maximum instantaneous speed changes (mm/min)

M906 X2600 Y2600 Z1500 E1200 I30 ; Set motor currents (mA) and motor idle factor in percent

@dc42 thanks

Ok lets try this again. I pressed submit and walked away only to find out that my session had timed out and never sent my reply.

Phaedrux, I think you figured it out. I made the changes that you suggested and so far its working great! thank you! It is much better now that I don't need to power cycle all of the time which I am assuming isn't that great for the duet board.

Alex.cr and bearer, Thank you for the responses as well. I did make the change to my start code (just G28) and cleaning them up more is on my to do list.

Alex, I'm not sure how the end code can cause my printer to crash. I have the bed lower after it prints then move to the origin. I'm a novice at programming though so maybe I'm not seeing what you are seeing. could you elaborate a bit more on that?

dc42 I made the change Phaedrux recommended before trying the M579. So far its working but I have to test it some more to make sure. Should I still try the M579? What will it do? Does that invert the origin?

Thanks everyone for the responses. If I have more problems I'll post again.