SOLVED: Help- PLA 2nd+ layers rough & bumping (with pics)

[Redeye333]

Printer: Prusa3d MK3
PLA: MatterHackers Build 1.75mm

I’m issues with a print in that every layer after the first layer gets more and more bumpy. The first layer is perfect, then it starts getting very rough and bumpy. If I raise the z calibration, then it’s stringy and too high. I’ve played with nozzle temp as well as head bed temp. I’ve reduced the flow from 1.1 to .85.

I believe the nozzle is causing this (as if it was too low) but raising it avoids “bumps” but causes other issues. I have also ensure I cleaned it repeatedly with Alcohol. Any ideas?!

Subsequent Layers

gCode Below
; generated by Slic3r Prusa Edition 1.41.0+ on 2018-09-27 at 11:18:50

;

; external perimeters extrusion width = 0.45mm
; perimeters extrusion width = 0.45mm
; infill extrusion width = 0.45mm
; solid infill extrusion width = 0.45mm
; top infill extrusion width = 0.40mm
; support material extrusion width = 0.35mm
; first layer extrusion width = 0.42mm

M201 X1000 Y1000 Z1000 E5000 ; sets maximum accelerations, mm/sec^2
M203 X200 Y200 Z12 E120 ; sets maximum feedrates, mm/sec
M204 P1250 R1250 T1250 ; sets acceleration (P, T) and retract acceleration ®, mm/sec^2
M205 X8.00 Y8.00 Z0.40 E1.50 ; sets the jerk limits, mm/sec
M205 S0 T0 ; sets the minimum extruding and travel feed rate, mm/sec
M107
M115 U3.4.0 ; tell printer latest fw version
M83 ; extruder relative mode
M104 S215 ; set extruder temp
M140 S55 ; set bed temp
M190 S55 ; wait for bed temp
M109 S215 ; wait for extruder temp
G28 W ; home all without mesh bed level
G80 ; mesh bed leveling
G1 Y-3.0 F1000.0 ; go outside print area
G92 E0.0
G1 X60.0 E9.0 F1000.0 ; intro line
M73 Q0 S739
M73 P0 R705
G1 X100.0 E12.5 F1000.0 ; intro line
G92 E0.0
M221 S95
M900 K30; Filament gcode
G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
;BEFORE_LAYER_CHANGE
G92 E0.0
;0.2

G1 E-0.80000 F2100.00000
G1 Z-1.000 F10800.000
;AFTER_LAYER_CHANGE
;0.2
G1 X121.162 Y48.908
G1 E0.80000 F2100.00000
M204 S1000
G1 F1500
G1 X121.669 Y48.227 E0.0239

[cobnut]

Are your 2nd (and subsequent) layer settings different from the 1st, fan, nozzle temp?

Have you printed successfully with this filament before, and/or this model? Does it happen with other materials?

It won’t be z-height as this really only affects the first layer, which you say is fine.

[Redeye333]

Thanks for the response! I didn’t change the fan but tested that and had no effect. What makes this more frustrating is that when I use the gcode samples that came with it, I don’t have this issue. But if I make pretty much anything with Slic3r, it has this same messy effect. I’ve looked at the codes and couldn’t see any difference in the settings. This is driving me nuts!

Here is a gcode from the sample which prints flawlessly for me.

; generated by Slic3r Prusa Edition 1.39.2-rc+win64 on 2018-05-07 at 12:32:32

;

; external perimeters extrusion width = 0.45mm
; perimeters extrusion width = 0.45mm
; infill extrusion width = 0.45mm
; solid infill extrusion width = 0.45mm
; top infill extrusion width = 0.40mm
; first layer extrusion width = 0.42mm

M107
M115 U3.2.1 ; tell printer latest fw version
M201 X1000 Y1000 Z200 E5000 ; sets maximum accelerations, mm/sec^2
M203 X200 Y200 Z12 E120 ; sets maximum feedrates, mm/sec
M204 S1250 T1250 ; sets acceleration (S) and retract acceleration (T)
M205 X10 Y10 Z0.4 E2.5 ; sets the jerk limits, mm/sec
M205 S0 T0 ; sets the minimum extruding and travel feed rate, mm/sec
M83 ; extruder relative mode
M104 S215 ; set extruder temp
M140 S60 ; set bed temp
M190 S60 ; wait for bed temp
M109 S215 ; wait for extruder temp
G28 W ; home all without mesh bed level
G80 ; mesh bed leveling
G1 Y-3.0 F1000.0 ; go outside print area
G92 E0.0
G1 X60.0 E9.0 F1000.0 ; intro line
G1 X100.0 E12.5 F1000.0 ; intro line
G92 E0.0
M221 S95
M900 K30; Filament gcode
G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
;BEFORE_LAYER_CHANGE
;0.2

G1 E-0.80000 F2100.00000
G1 Z-0.990 F10800.000
;AFTER_LAYER_CHANGE
;0.2

[Redeye333]

Well after I determined the samples printed great, but the gcodes from Slic3r were not, I tried a couple other slicers and did not have the same issues as with Slic3r. I deleted all the profiles and started fresh and by ensuring I didn’t tweak anything at all, the prints seem to be working well now. I still don’t know what caused the issue as I analyzed the gcodes against each other, but at this point I’m just happy it’s printing successfully.