Strange Extruder Behavior 1LC

br7408

I posted before about this, but it is such an intermittant issue, that I was having trouble tracking it down.

Every so often, at random, I go to print, and my extruder starts skipping right off the bat, as if it is being under-driven. I usually catch it because it happens while printing my initial prime line before printing. What fixes it is a re-start of the machine.

I am also noticing that at certain speeds during a print and randomly, it does the same exact thing. I printed an entire flawless 10 layer base with a .8 nozzle at .2 layer height 160mm/s. when the print got to a gap fill portion in the wall section, at 132.5 mm/s, the extruder skipped the entire time across the layer, and on every subsequent similar gap fill layer.

When it does this, I also notice a higher pitched buzzing noise accompanied with the extruder skipping. I am absolutely not exceeding my flow rate. This is a a very random and intermittant issue. It really seems like the extruder is not being driven properly.

I need to get to the bottom of this, because it is completely ruining my ability to produce consistent prints.

SJI

I've just completed a 23hr print with a 1lc, but I'm having to print at slower speeds as I'm using soft tpu.
My chamber and 1lc temps are low.
IMHO, With the current issues around the 1lc I wonder if it's a print speed related. I'm no software guru, it's just a hunch

jay_s_uk

@br7408 what firmware version?

br7408

@jay_s_uk
3.4.4 on the 1LC
3.4.5 on the Duet 3 Mini
1.2.7 Duet wifi server

gloomyandy

@br7408 Please post your config.g file.

br7408

@gloomyandy said in Strange Extruder Behavior 1LC:

@br7408 Please post your config.g file.

; Configuration file for Duet 3 Mini 5+ (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.16 on Sun Apr 16 2023 22:41:37 GMT-0400 (Eastern Daylight Time)

; General preferences
G90                                              ; send absolute coordinates...
M83                                              ; ...but relative extruder moves
M550 P"BR1"                                      ; set printer name
M669 K1                                          ; select CoreXY mode

; Wait a moment for the CAN expansion boards to start
G4 S2

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

; Drives
M569 P0.0 S0                                   ; physical drive 0.0 goes forwards
M569 P0.1 S0                                    ; physical drive 0.1 goes forwards
M569 P0.2 S0                                    ; physical drive 0.2 goes forwards
M569 P0.3 S1                                     ; physical drive 0.3 goes forwards 
M569 P0.4 S1                                     ; physical drive 0.4 goes forwards 
M569 P0.5 S1                                     ; physical drive 0.5 goes forwards
M569 P121.0 S0                                   ; physical drive 121.0 goes forwards
M584 X0.4 Y0.3 Z0.2:0.1:0.0 E121.0                       ; set drive mapping
M350 E16 I0                                      ; configure microstepping without interpolation
M350 X16 Y16 Z16 E32 I1                              ; configure microstepping with interpolation
M92 X80.34 Y80.17 Z803.62 E817.00                ; set steps per mm for .8mm ASA filament            
M566 X700.00 Y700.00 Z60.00 E800.00              ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z180.00 E6000.00          ; set maximum speeds (mm/min)
M201 X6000.00 Y6000.00 Z20.00 E3000.00              ; set accelerations (mm/s^2)
M906 X1700 Y1700 Z1600 E600 I30                     ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                          ; Set idle timeout

; Axis Limits
M208 X-245:245 Y-250:250 Z0:460                  ;XY axis minima

; Endstops
M574 X1 S1 P"io0.in"                             ; configure switch-type (e.g. microswitch) endstop for low end on X via pin io0.in
M574 Y2 S1 P"io1.in"                             ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin io1.in
M574 Z1 S2                                       ; configure Z-probe endstop for low end on Z

; Bed Leveling
M671 X-253.5:-1:253.5 Y-243:267.5:-243 S5              ; define positions of Z leadscrews or bed levelling screws
M557 X-200:200 Y-190:210 S20                        ; define 5x5 mesh grid

; Z-Probe
M950 S0 C"121.io0.out"                           ; create servo pin 0 for BLTouch
M558 P8 C"121.io0.in" H4 F120 T12000 R0.2 A20 S0.005  ; set Z probe type to DuetIR and the dive height + speeds avg 5 probes  tolerance .01
;M558 H30                                         ;*** Remove this line after delta calibration has been done and new delta parameters have been saved
G31 P50 X27.33 Y73.71 Z2.25              ; set Z probe trigger value, offset and trigger height
M556 S50 X0 Y0 Z0                                ; set orthogonal axis compensation parameters
M557 X-200:200 Y-190:210 P5                      ; define mesh grid

; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B3950 A"Bed"    ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0 Q11                                 ; create bed heater output on out0 and map it to sensor 0, lower switching frequency 11hz
;M307 H0 R0.456 K0.916:0.000 D3.79 E1.35 S1.00 B0       ; old heater PID parameters 100C given from PID tune 14May23
M307 H0 R0.460 K0.487:0.000 D3.36 E1.35 S1.00 B0        ; PID parameters 110 C 22May23
M140 H0                                          ; map heated bed to heater 0
M143 H0 S120                                     ; set temperature limit for heater 0 to 110C
M308 S1 P"121.temp0" Y"PT1000"                       ; configure sensor 1 as thermistor on pin 121.temp0
M950 H1 C"121.out0" T1                           ; create nozzle heater output on 121.out0 and map it to sensor 1
M307 H1 R2.634 K0.716:0.109 D5.74 E1.35 S1.00 B0 V23.6                              ; PID from 13May23 255 celsius
M143 H1 S295                                     ; set temperature limit for heater 1 to 295C

; Fans
M950 F0 C"!out4+out4.tach" Q25                   ; create fan 0 on pin out4 and set its frequency
M950 F1 C"121.out2" 				        	 ; create fan 1 at extruder toolboard
M106 P0 S0 H-1                                   ; set fan 0 value. Thermostatic control is turned off
M106 P1 T40 H1:1                                 ; set extruder 121 fan to run at 40° extruder temp 

; Tools
M563 P0 S"Mosquito Magnum" D0 H1 F0              ; define tool 0
G10 P0 X0 Y10 Z0                                 ; set tool 0 axis offsets
G10 P0 R0 S0                                     ; set initial tool 0 active and standby temperatures to 0C
;M572 D0 S0.028                                   ;PA for .8 ASA
;M572 D0 S0.06                                   ;PA .6 ASA
;M572 D0 S0.045									;PA for 1.2 ASA
;M572 D0 S0.05									;PA for .6 Nylon
M572 D0 S0.085									; PA for .8 PETG
;M572 D0 S0.065									;PA for .4 PC

; retraction
;M207 S0.5 F3000							; retraction amount and speed ASA .8
;M207 S0.8 F2700                                  ; retraction amount and speed ASA 1.2
M207 S0.25 F2100 							; retraction for PETG .8

; Accelerometer and Input Shaping
M955 P121.0 I54
M593 P"ei3" F35 S0.02

;configure direct connect display
M918 P2 E-4 F2000000
M150 X2 R255 U255 B255 P255 S1 F1      ; display led
M150 X2 R0 U0 B255 P255 S1 F1      ; left encoder led
M150 X2 R0 U0 B255 P255 S1 F0      ; right encoder led

; Custom settings are not defined

; Miscellaneous

gloomyandy

@br7408 I'd be tempted to increase the start up delay to be G4 S4, the problems sound to me like sometimes you are not setting the motor current for the extruder. That can happen if the m906 command runs before the CAN connection with the board has been fully established.

Phaedrux

@br7408 said in Strange Extruder Behavior 1LC:

@jay_s_uk
3.4.4 on the 1LC
3.4.5 on the Duet 3 Mini
1.2.7 Duet wifi server

Also please update to 3.4.6 all around.

https://github.com/Duet3D/RepRapFirmware/releases/download/3.4.6/Duet2and3Firmware-3.4.6.zip

br7408

@gloomyandy Changed that, thanks.

br7408

@Phaedrux Just updated yesterday