Bad printing quality for unknown reason

Phantom329

Ok that could make sense... It came from a parts kit so I will have to do a bit of digging to get the exact information. I have a config that came with the kit but it looks like some lines changed in the update to RRF 3.

EDIT: Also, bed and extruder both say 21.7C at idle so I assumed they were set correctly.

; Configuration file for Duet WiFi (firmware version 1.21)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Tue Oct 09 2018 13:27:56 GMT+0300

; General preferences
M80				; Turns on the ATX power supply
G90                                                ; Send absolute coordinates...
M83                                                ; ...but relative extruder moves

M667 S1                                            ; Select CoreXY mode

; Network
M550 PBLV mgn Cube                                 ; Set machine name
M552 S1                                            ; Enable network
M587 S"your_wifi_name" P"your_password"            ; Configure access point. You can delete this line once connected
M586 P0 S1                                         ; Enable HTTP
M586 P1 S0                                         ; Disable FTP
M586 P2 S0                                         ; Disable Telnet

; Drives
M569 P0 S0                                         ; Drive 0 goes backwards blv: its was S1
M569 P1 S0                                         ; Drive 1 goes backwards blv: its was S1
M569 P2 S1                                         ; Drive 2 goes forwards
M569 P3 S1                                         ; Drive 3 goes backwards WAS 0
M350 X16 Y16 Z16 E16 I1                            ; Configure microstepping with interpolation
M92 X200 Y200 Z400 E405.18                         ; Set steps per mm for Bondtech. 
M566 X600 Y600 Z24 E300                            ; Set maximum instantaneous speed changes (Jerk) (mm/min) 
M203 X20000 Y20000 Z600 E2000                      ; Set maximum speeds (mm/min) 
M201 X3000 Y3000 Z100 E5000			   				 ; Set accelerations (mm/s^2)
M906 X1600 Y1600 Z1600 E1600 I30                   ; Set motor currents (mA) and motor idle factor in per cent
M84 S30                                            ; Set idle timeout

; Pressure advance
; M572 D0 S0.05					   					; disabled Pressure advance

; Axis Limits
M208 X-23 Y0 Z0 S1                                 ; Set axis minima
M208 X320 Y321 Z350 S0                             ; Set axis maxima

; Endstops
M574 X1 Y2 S1                                      ; Set active high endstops edit: Y endstop is high(max).

; Filament sensor
M591 D0 P1 C3 S1				 					  ; Set Filament sensor Simple type (High) for extruder drive 0, connected to endstop input 3 (E0)

; Z-Probe
M574 Z1 S2                                         ; Set endstops controlled by probe
M307 H1 A372.3 C109.6 D4.6 B0			  		 ; Set PID for hotend values
M307 H0 A99.1 C453.2 D2.2 B0					  ; Set PID for heated bed values
M558 P1 H5 F200 T9000 I0 R0.5			 		  ; Set Z probe type mini ir sensor
G31 P500 X-2 Y-16.4 Z1.043                         ; Set Z probe trigger value, offset and trigger height
M557 X30:270 Y30:270 S80			   				; Define mesh grid

; Heaters
M305 P0 T100000 B3950 C0 R4700                     ; Set thermistor + ADC parameters for heater 0
M143 H0 S100                                       ; Set temperature limit for heater 0 to 100C
M305 P1 T100000 B3950 C0 R4700                     ; Set thermistor + ADC parameters for heater 1
M143 H1 S260                                       ; Set temperature limit for heater 1 to 260C

; 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 T35                          ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F500 H1 T35                          ; 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 power saving
M911 S21 R22 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

; Custom settings are not configured
M564 H0                                   	   ; Let the Jog buttons work blv: added to allow jog buttons

Veti

@Phantom329 said in Bad printing quality for unknown reason:

EDIT: Also, bed and extruder both say 21.7C at idle so I assumed they were set correctly.

since they are all 100k thermistor the 25C degree value is the same for all. they differ at high temperatures.

Phantom329

Ok I set the thermistors to B3950 like the original config says since I can't find any documentation about the parts from the kit. I'll run another print after I auto tune and see how it goes.

Veti

can you post a link to the kit?

Phantom329

@Veti Its the full BLV MGN Cube kit https://www.aliexpress.com/item/4000216439704.html

Phantom329

@Veti I think it printed better but it still has the weird lines artifact. Printing a benchy now.
EDIT: Benchy failed but same story.

print

brotherchris

Hey, I just happen to see you said Cura, just a wild guess on my part. Is your Slicer set to 3mm filament?

Veti

@Phantom329 said in Bad printing quality for unknown reason:

EDIT: Benchy failed but same story.

maybe they supplied a semitec thermistor. try B4725 C7.06e-8

Phantom329

@brotherchris Nope, I have the extruder and material set to 1.75mm.

Phantom329

I slowed down the printing speed to 30mm/s and on one side it printed almost the same, smaller blobs. On the other side, though, it printed with minimal blobs and shows pretty clean lines. I'm tempted to blame the feeder... its a knock-off dual drive feeder and I had to rebuild it like 10 times to make it smooth. My friend also said it could be the hotend which is a v6 clone. What do you think?

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