Advice for improving print quality

jrjones88

I'm not really sure what I am doing wrong.
After fixing a bad thermistor/hot end connection, I thought I was back on track getting decent print quality.
I just changed nozzles from 0.4 to 0.6 mm on a print (layer height kept the same) and the quality was drastically worse.
On the 0.4 mm nozzle prints I was getting some striations, which I thought was strange, but could live with it. With the 0.6 mm nozzle prints, it looks like layer shifting but everything physical with the printer is in order (belts are tensioned, I don't notice skipping, etc).
The blobbing is me still needing to get retraction tuned properly, but would appreciate any advice.
0.6mm Nozzle
IMG_20211106_163609[1].jpg
IMG_20211106_163620[1].jpg
0.4mm nozzle, same object
IMG_20211106_163702[1].jpg
IMG_20211106_163710[1].jpg

Printer base is a Seemecnc RostockMaxV2 (Delta)

RepRapFirmware for Duet 2 WiFi/Ethernet version 3.3 (2021-06-15 21:44:54) running on Duet WiFi 1.0 or 1.01
Board ID: 08DAM-999TL-MQ4S8-6J1FL-3SN6S-9QBRX

Config here:

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.0 on Thu Aug 05 2021 19:10:57 GMT-0700 (Pacific Daylight Time)

; General preferences
G90                                               ; send absolute coordinates...
M83                                               ; ...but relative extruder moves
M550 P"M-Automation"                              ; set printer name
M665 R138.543 L290.8 B140 H592.5 X0.714 Y1.066 Z0.000     ; Set delta radius, diagonal rod length, printable radius and homed height
M666 X-0.353 Y-0.422 Z0.775 A-0.48 B0.30          ; put your endstop adjustments here, or let auto calibration find them

; 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 S0                                        ; physical drive 2 goes backwards
M569 P3 S1                                        ; physical drive 3 goes forwards
M584 X0 Y1 Z2 E3                                  ; set drive mapping
M350 X16 Y16 Z16 E16 I1                           ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z80.00 E416.78859                  ; set steps per mm
M566 X1000.00 Y1000.00 Z1000.00 E3000.00 P1         ; set maximum instantaneous speed changes (mm/min)
M203 X15000.00 Y15000.00 Z15000.00 E3000.00       ; set maximum speeds (mm/min)
M201 X8300.00 Y8300.00 Z8300.00 E10000.00       ; set accelerations (mm/s^2)
M906 X1400 Y1400 Z1400 E1400 I30                  ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                           ; Set idle timeout

; Axis Limits
M208 Z-0.2 S1                                     ; set minimum Z

; Endstops
M574 X2 S1 P"xstop"                               ; configure active-high endstop for high end on X via pin xstop
M574 Y2 S1 P"ystop"                               ; configure active-high endstop for high end on Y via pin ystop
M574 Z2 S1 P"zstop"                               ; configure active-high endstop for high end on Z via pin zstop

; Z-Probe
M558 P8 C"^zprobe.in" H2.5 F300:150 A015 S0.02 T15000           ; set Z probe type to switch and the dive height + speeds
G31 P1000 X0 Y0 Z-0.04                             ; set Z probe trigger value, offset and trigger height
M557 R120 S15                                     ; define mesh grid

; Heaters
M308 S0 P"duex.e4temp" Y"thermistor" T95205 B3285 ; configure sensor 0 as thermistor on pin duex.e4temp
M950 H0 C"bedheat" T0                             ; create chamber heater output on bedheat and map it to sensor 0
M307 H0 A19.0 C18.4 D1.6 S1.00 V12.7 B0           ; disable bang-bang mode for the chamber heater and set PWM limit
M141 H0                                           ; map chamber to heater 0
M143 H0 S105                                      ; set temperature limit for heater 0 to 105C
M308 S1 P"e0temp" Y"thermistor" T108341 B4527     ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                              ; create nozzle heater output on e0heat and map it to sensor 1
M307 B0 R2.201 C212.1 D6.73 S1.00 V12.7			  ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S280                                      ; set temperature limit for heater 1 to 280C
M308 S2 P"e1temp" Y"thermistor" T108341 B4527     ; configure sensor 2 as thermistor on pin e1temp
M950 H2 C"e1heat" T2                              ; create bed heater output on e1heat and map it to sensor 2
M307 H2 A190.3 C949.5 D1.2 S1.00 V12.8 B0         ; enable bang-bang mode for the bed heater and set PWM limit
M140 H2                                           ; map heated bed to heater 2
M143 H2 S125                                      ; set temperature limit for heater 2 to 125C
M308 S3 P"bedtemp" Y"thermistor"  A"Chamber Temp"  T103972 B10191 C4.825776e-7 R4700                     ; set thermistor + ADC parameters for chamber thermistor

; Fans
M950 F0 C"fan0" Q50000                            ; create fan 0 on pin fan0 and set its frequency
M106 P0 C"CPU Fan" S0.25 H0 T30                   ; set fan 0 name and value. Thermostatic control is turned on
M950 F1 C"fan1" Q0                                ; create fan 1 on pin fan1 and set its frequency
M106 P1 C"Hot End" S1 H1 T45                      ; set fan 1 name and value. Thermostatic control is turned on
M950 F2 C"fan2" Q500                              ; create fan 2 on pin fan2 and set its frequency
M106 P2 C"Chamber Heater" S0.25 H1 T35            ; set fan 2 name and value. Thermostatic control is turned on

; 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

; Custom settings
;CPU Temp compensation
M912 P0 S-2.4
;Driver Temp Flag
M305 P101 S"Drivers"

;Retraction
M207 S2.0 R0.10 F6000 T4500 Z0
M572 D0 S0

; Miscellaneous
M501                                              ; Load saved parameters from non-volatile memory
T0                                                ; Select first tool

Let me know if it is useful to have the gcode files, as they are ~12 mb in size, so too large to upload directly to the forum.

percar

@jrjones88
There are a couple of items that can be causing this

Check to insure that the extruder and hot end are not moving or loose. If it is loose then may get something that looks like your print
Even though you are not hearing any clicking on the extruder the filament may not be feeding smoothly. Is this a bowden type extruser or direct Drive?
If it is a bowden extruder try squirting some light oil in the bowden extruder to help eleviate some of the friction.
Also clean out the nozzle as sometimes there are some small chunks in the nozzle that block the filament from extruding smoothly
Check the actual filament drive as I have had issues where there was a string that was wedging against the filament and causing inconsistant extrusion
The extruder is too cold. When going up in nozzle size you may have to increase the temperature for the highter volume. Try 10 or 15 degrees higher and see if it helps