my printer build box is 400x300x530, I have two Z motors they are on separate drives with separate endstops for automatic bed leveling, all movement and homing works fine.

My problem is when i move the z axis the stepper motors has a different speed, my build box high is 500mm when i move from 0 to 500mm i god a difference from 6mm at the end.

The strange thing is i have also two y motors the work with the same config perfectly.

Any ideas how can i solve this?

This is my config.g:

; General preferences
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves

; Network
M550 PMonster ; Set machine name
M552 P192.168.88.100 S1 ; Enable network and set IP address
M553 P255.255.255.0 ; Set netmask
M554 P192.168.88.1 ; Set gateway
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Drives
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S0 ; Drive 1 goes backwards
M569 P2 S0 ; Drive 2 goes forwards
M569 P3 S0 ; Drive 3 goes forwards
M569 P4 S0 ; Drive 4 goes forwards
M569 P5 S1 ; Drive 5 goes backwards
M569 P6 S0 ; Drive 5 goes backwards
M584 X0 Y1:3 Z2:4 U3 V4 E5:6
M350 X16 Y16:16 Z16:16 U16 V16 E16:16 I1 ; Configure microstepping with interpolation
M92 X396.82 Y396.82 Z396.82:396.82 U396.82 V396.82 E400:400 ; Set steps per mm
M566 X900 Y900:900 Z200:200 U900 V200 E120:120 ; Set maximum instantaneous speed changes (mm/min)
M203 X4800 Y4800:4800 Z1500:1500 U4800 V1500 E3000:3000 ; Set maximum speeds (mm/min)
M201 X250 Y250:250 Z250:250 U250 V250 E250:250 ; Set accelerations (mm/s^2)
M906 X2000 Y2000:2000 Z2000:2000 U2000 V2000 E800:800 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 U0 V0 S1 ; Set axis minima
M208 X289 Y220 Z530 U220 V530 S0 ; Set axis maxima

; Endstops
M574 X2 Y1 Z2 U1 V2 S0 ; Set active low endstops

; Z-Probe
M307 H3 A-1 C-1 D-1
M558 P9 H5 F100 T2000
G31 X45.25 Y5 Z2.04 P25
M557 X15:230 Y15:230 S50 ; Define mesh grid

; Heaters
M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S120 ; Set temperature limit for heater 0 to 120C
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S300 ; Set temperature limit for heater 1 to 280C
M305 P2 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 2
M143 H2 S300 ; Set temperature limit for heater 2 to 280C

; Fans
M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H1:2 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F500 H1:2 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 ; Define tool 0
G10 P0 X10 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C
M563 P1 D1 H2 ; Define tool 1
G10 P1 X-10 Y0 Z0 ; Set tool 1 axis offsets
G10 P1 R0 S0 ; Set initial tool 1 active and standby temperatures to 0C

; Automatic saving after power loss is not enabled

; Custom settings are not configured

Hi

I have a printer with two motors on the y axis each of them has a endstop. One of this motors and endstops connected to the duex5 E2. I have mapped the motors together in the config.

When i homing the Y axis both motors beginn working correctly but only this on how is connected to the duet board directly is stoping when the endstop is hitted.

config.g

; Configuration file for testing Duet Ethernet and Wifi with V1.19 firmware

---

FOR TESTING ONLY! USE https://configurator.reprapfirmware.org/ to generate configuration files for your printer!

---

; Communication and general
M111 S0 ; Debug off
M550 PDuetTest ; Machine name and Netbios name (can be anything you like)
M551 Preprap ; Machine password (used for FTP)
;*** If you have more than one Duet on your network, they must all have different MAC addresses, so change the last digits
M540 P0xBE:0xEF:0xDE:0xAD:0xFE:0xED ; MAC Address

;*** Networking
M552 S1 ; Turn network on

;*** Ethernet networking: Adjust the IP address and gateway in the following 2 lines to suit your network
M552 P192.168.88.100 ; (0 = DHCP)
M554 P192.168.88.1 ; Gateway
M553 P255.255.255.0 ; Netmask

M555 P2 ; Set output to look like Marlin
G21 ; Work in millimetres
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves

; Drives
M569 P0 S0 ; Drive 0 goes backwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M569 P4 S1 ; Drive 4 goes forwards
M569 P5 S1 ; Drive 5 goes forwards
M584 X0 Y1:5 Z2 E3:4 U5 P5
M350 X256 Y256:256 U256 Z256 I0 ; Configure microstepping without interpolation
M350 E16:16 I1 ; Configure microstepping with interpolation
M92 X10666.667 Y10666.667:10666.667 U10666.667 Z10666.667 E420:420 ; Set steps per mm
M566 X900 Y900:900 U900 Z12 E120:120 ; Set maximum instantaneous speed changes (mm/min)
M203 X7200 Y7200:7200 U7200 Z180 E1200:1200 ; Set maximum speeds (mm/min)
M201 X500 Y500:500 U500 Z500 E250:250 ; Set accelerations (mm/s^2)
M906 X2000 Y2000:2000 U2000 Z2000 E800:800 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 U0 Z0 S1 ; Set axis minima
M208 X322 Y259 U259 Z556 S0 ; Set axis maxima

; Endstops
M574 X1 Y1 U1 Z2 S0 ; Set active low endstops

; Z-Probe
;M558 P0 H5 F120 T6000 ; Disable Z probe but set dive height, probe speed and travel speed
M557 X15:307 Y15:244 S20 ; Define mesh grid

; Heaters
M140 H-1 ; Disable heated bed
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S280 ; Set temperature limit for heater 1 to 280C

; Fans
M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F500 H T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 ; 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

; Automatic saving after power loss is not enabled

; Custom settings are not configured

homey.g

; homey.g
; called to home the Y axis
;
; generated by RepRapFirmware Configuration Tool on Tue Aug 07 2018 11:06:40 GMT+0200 (Central European Summer Time)
G91 ; relative positioning
M584 Y1 U5
G1 Z5 F6000 S2 ; lift Z relative to current position
G1 S1 Y-264 U-264 F1800 ; move quickly to Y axis endstop and stop there (first pass)
G1 Y5 F6000 ; go back a few mm
G1 S1 Y-264 U-264 F360 ; move slowly to Y axis endstop once more (second pass)
G1 Z-5 F6000 S2 ; lower Z again
M584 Y1:5
G90 ; absolute positioning

Thank you for any help