Hi David

I received my new board a week ago and it's working like a charm.

I want to thank Roland from Think3dPrint3d for the great customer service and you, David, for your rapid and efficient help to find and solve my problem.

The duetEthernet is a really good controller and i'm now fully convince to have make the right choice.

Thank you all and have a merry christmas and a happy new year !

Johann

Ok, these are things that happen!
I'm happy to contribute to have better Duet board

Thank you dc42, I set G91 then …

... with A motor on X driver, B motor on Y driver :
G1 X-20 Y20 F360 => smooth (only B motor moves)
G1 X20 Y20 F360 => jerky (A motor "try" to moves)

... with A motor on Y driver, B motor on X driver :
G1 X-20 Y20 F360 => smooth (only A motor moves)
G1 X20 Y20 F360 => jerky (B motor "try" to moves)

It's probably a X driver problem, no ?

This is already a replacement. The first one having the same problem but with Z driver !
I will recontact Roland ... i'm a bit dissapointed ... Fortunately they have quickly treat the problem the first time. Hope this will be as quickly this time. More than 2 weeks without 3d printer, it's hard

Thank you all for your help.

All is working well with my RAMPS board so i think it's not a mechanical or wiring problem .
I will check it twice tonight …

This is my last complete config.g file :

[[language]]
; General preferences
M111 S0 	; Debugging off
G21 		; Work in millimetres
G90 		; Send absolute coordinates...
M83 		; ...but relative extruder moves
M555 P2 	; Set firmware compatibility to look like Marlin

M667 S1 		; Select CoreXY mode

; Bed size
M208 X0 Y0 Z0 S1 	; Set axis minima
M208 X230 Y230 Z210 S0 	; Set axis maxima

; Endstops
M574 X1 Y1 Z1 S1 				; Set low end active high endstops on all axis

; Mesh grid
M557 X15:215 Y15:215 S20

; Drives
M569 P0 S1 				; Drive 0 goes forwards
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

M350 X16 Y16 Z16 E16:16 I1 		; Configure microstepping with interpolation

M92 X80 Y80 Z400 E608:608 		; Set steps per mm
M566 X1000 Y1000 Z100 E500:500 		; Set maximum instantaneous speed changes (mm/min)
M203 X18000 Y18000 Z1000 E9000:9000 	; Set maximum speeds (mm/min)
M201 X3000 Y3000 Z500 E3000:3000 	; Set accelerations (mm/s^2)
M906 X1700 Y1700 Z1700 E1700:1700 I30 	; Set motor currents (mA) and motor idle factor in per cent
M84 S120 				; Set idle timeout

; Heaters
M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 	; Use PID on bed heater (may require further tuning)
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 S280 					; Set temperature limit for heater 1 to 280C
M305 P2 T100000 B4138 C0 R4700 			; Set thermistor + ADC parameters for heater 2
M143 H2 S280 					; Set temperature limit for heater 2 to 280C

; 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
M563 P1 D1 H2 		; 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

; Network
M550 PK3D 		; Set machine name
M540 PBE:EF:DE:AD:FE:ED ; Set MAC address
M552 P0.0.0.0 S1 	; Enable network and acquire dynamic address via DHCP
M586 P0 S1 		; Enable HTTP
M586 P1 S0 		; Disable FTP
M586 P2 S0 		; Disable Telnet

; Fans
M106 P0 S0 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

; Custom settings are not configured

@dc42, I'm at work, I will send it to you tonigh.

@deckingman, yes i can freely move it by hand with motor off. Nothing is sticking or binding. Motor connections seems to be ok .

Hi all,

I just acquired a DuetEthernet and I'm trying to configure it for my corexy printer (mzbot voron 1.5).
I get to move the x and y axes at F3600 but if I move them at F360 the movement becomes jerky and xy carriage begin to move diagonally.

My drive configuration is as follows :
M667 S1; Select CoreXY mode
M350 X16 Y16 Z16 E16: 16I1; Configure microstepping with interpolation
M92 X80 Y80 Z400 E608:608; Set steps per mm
M566 X1000 Y1000 Z100 E500: 500; Set maximum instantaneous speed changes (mm / min)
M203 X18000 Y18000 Z1000 E9000: 9000; Set maximum speeds (mm / min)
M201 X3000 Y3000 Z500 E3000: 3000; Set accelerations (mm / s ^ 2)
M906 X1500 Y1500 Z1500 E1500: 1500 I30; Set motor currents (mA) and motor idle factor in per cent
M84 S120

Firmware Name: RepRapFirmware for Duet Ethernet
Firmware Electronics: Duet Ethernet 1.0
Firmware Version: 1.19.2 (2017-09-01)
Web Interface Version: 1.19.3

I've tried to increase or reduce speed, acceleration, instantaneous speed changes, current (2.0A rated current/phase stepper motor) …

I calculated speed like this :
speed = (4 * pulley_teeth * supply_voltage)/(steps_per_rev * pi * inductance * current)
speed = (4 * 20 * 12)/(200 * 3.1418 * 0.003 * 1.7)
speed = 18000 mm/min

Do you know what can cause this ?

Thanks for your help.

Johann