Hi fellows.
"we do it not because it is easy but because it is hard" -JFK
I found one cure for cura: setting "final printing temperature" to 170C (195)
Now my printer seems to survive from dualprinting a wall with small windows.
Thanks for mental and real help.

Hi and thank´s for help.
Here´s my printer settings in Cura:

G28 ;Home
G1 Z15.0 F6000 ;Move the platform down 15mm
;Prime the extruder

Start Gcode:
G10 P0 R140 S205
G10 P1 R140 S205
G92 E0
G1 F200 E3
G92 E0

End gcode:
M104 S0
M140 S0
;Retract the filament
G10 P0 S0 R140
G10 P1 S0 R140
G92 E1
G1 E-1 F300
G28 X0 Y0
M84

Yes wiring was the reason. I changed hotends ant thermistors. Still I can´t control the standby temperature.

I changed slicer start and end codes. Heater fault occured two times.
It´s getting wild.

Ok, I put in config.g next lines:
; Tools
M563 P0 D0 H1 F0 ; define tool 0
G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
G10 P1 R140 S0 ; set initial tool 0 active and standby temperatures

M563 P1 D1 H2 F0 ; define tool 1
G10 P1 X0 Y0 Z0 ; set tool 1 axis offsets
G10 P2 R140 ; set initial tool 1 active and standby temperatures
Heater 1 is my problem. Heater 2 reacts somehow.

Hi!

My printer is clogging in dual extrusion.
My printer is a rebuilt Leapfrog Creatr with duet2 wifi and V6 style extruder with direct dualdrive, 1.75 mm filament.
I think the reason is a too high standby temperature for PLA, 195-205C. In Cura 4.5 I configured the standby temperatue for both PLA filaments to be 150 degrees. The gcode gives at the beginning:
T0
M190 S60
M104 S205
M104 T1 S150
M109 S205
M109 T1 S150

Ok, but soon comes for my surprise
T1
M109 S205
M104 T0 S195
or
T0
M109 S195
M104 T1 S195

Could this be the reason for clogging? The extruder 1 is cloggin , the second is not. their standby temperature difference seems to be 10 degrees(205,195)

Also when printing with single extruder PETG filament with Titan Aero this happens after 1h printing.
(Cooling is ok printing temperature 250C, no filament cooling)

@dc42 said in Y-stepper noise:

T100000

Thanks 100000 times!
Now both thermistors can be read.

Hi dc42!

; Configuration file for Duet WiFi (firmware version 2.03)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2.1.5 on Sat Jan 11 2020 15:38:33 GMT+0200 (Itä-Euroopan normaaliaika)

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Leapfrog-Duet" ; set printer name

; 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 goes backwards
M569 P1 S1 ; physical drive 1 goes forwards
M569 P2 S1 ; physical drive 2 goes forwards
M569 P3 S1 ; physical drive 3 goes forwards
M569 P4 S1 ; physical drive 4 goes forwards
;M569 P5 R1 T2.5:2.5:5:0

;M584 U5;5

M584 X0 Y1 Z2 E3:4 ; set drive mapping

M350 X16 Y16 Z16 E16:16 I1 ; configure microstepping with interpolation
;M350 U16

M92 X66.67 Y66.67 Z654.02 E93.00:93.00 U654.02 ; set steps per mm

M566 X900.00 Y900.00 Z12.00 E120.00:120.00 ; set maximum instantaneous speed changes (mm/min)

;M566 U12.00

M203 X6000.00 Y6000.00 Z180.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
;M203 U180.00

M201 X500.00 Y500.00 Z20.00 E250.00:250.00 ; set accelerations (mm/s^2)
;M201 U20.00

M906 X800 Y1600 Z1600 E800:800 I30 ; set motor currents (mA) and motor idle factor in per cent
;M906 U1600 I30

M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1
;M208 U0 S1

                          ; set axis minima

M208 X210 Y250 Z200 S0 ; set axis maxima
;M208 U200 S0

; Endstops
M574 Z0 S0 ; set active low and disabled endstops
M574 X1 Y1 S1 ; set active high endstops
;M574 U0 S0

; Z-Probe
M558 P0 H5 F120 T6000 ; disable Z probe but set dive height, probe speed and travel speed
M557 X15:200 Y15:195 S20 ; define mesh grid

; Heaters
;M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
;M143 H0 S120 ; set temperature limit for heater 0 to 120C
;M305 P1 T100 B3950 R4700 ; set thermistor + ADC parameters for heater 1
;M143 H1 S280 ; set temperature limit for heater 1 to 280C
;M305 P2 T100 B3950 R4700 ; set thermistor + ADC parameters for heater 2
;M143 H2 S280
; set temperature limit for heater 2 to 280C

M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M305 P1 T100 B3950 R4700 ; set thermistor + ADC parameters for heater 1
M143 H1 S280 ; set temperature limit for heater 1 to 280C
M305 P2 T100 B3950 R4700 ; set thermistor + ADC parameters for heater 2

M307 H1 A455.9 C183.2 D17.7 S1.00 V24.1 B0
M307 H2 A499.7 C172.7 D10.4 S1.00 V24.1 B0

;M570 H1 P4 T20 s1
; 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 H-1 ; set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P2 S1 I0 F500 H-1 ; set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

; 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
M563 P1 D1 H2 F0 ; 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

Hi droftarts

• all temperature sensors disconnected -> temp 2000C
  -E0 temperature sensor connected (100k measured) -> 2000C
  E0 temperature sensor connected to Rumba worked ok

I changed the configuration, but the temperature stays in 2000C as in picture 16 Jan 2020, 20:19