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rseal88
(@rseal88)
Active Member
Continuous extruding at the start of a print

When the print starts the nozzle and bed heats up and then the print starts. Then the nozzle stays in one place and extrudes filament continuously. It makes this giant blob and does nothing else. It doesn't mater what I try to print or whether I print from the computer or the SD card. Whats going on? Is this a hardware issue or a software issue? 

 

This topic was modified 4 years ago 2 times by rseal88
Posted : 05/05/2020 3:41 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Continuous extruding at the start of a print

does this also happen with Pre sliced models? 

Have you updated your firmware recently? 

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 05/05/2020 3:48 pm
rseal88
(@rseal88)
Active Member
Topic starter answered:
RE: Continuous extruding at the start of a print

@joantabb

What do you mean by pre sliced models? I will try updating the firmware. I inherited this printer from a friend who was frustrated by this issue so im trying to work through it. 

Posted : 06/05/2020 1:51 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Continuous extruding at the start of a print

Prusa supply some pre sliced models with new printers  If you download the Drivers and Apps package from this address
https://www.prusa3d.com/drivers/
you can choose to download a set of pre sliced models as part of the package.  this will give you files that should simply 'WORK'! 🙂

a selection of these files are available at the address below (beware that some files are for multimaterial printers and some files are for the SL1, these will not work with a single filament printer. 

https://www.prusa3d.com/printable-3d-models/

I have selected one of these files, from the address below, 

prusaprinters.org/prints/3121-batman-batarang/files

And I enclose a zipped version of the Gcode, below

mk3_pla_batman_200um_18m

Good Luck, 
regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 06/05/2020 2:53 pm
rseal88
(@rseal88)
Active Member
Topic starter answered:
RE: Continuous extruding at the start of a print

@joantabb

Great. I will give that a try. Thank you!

Posted : 06/05/2020 3:32 pm
rseal88
(@rseal88)
Active Member
Topic starter answered:
RE: Continuous extruding at the start of a print

@joantabb

Great. I will give that a try. Thank you!

Posted : 06/05/2020 3:32 pm
rseal88
(@rseal88)
Active Member
Topic starter answered:
RE: Continuous extruding at the start of a print

That worked. Does that mean its a G-Code issue. Maybe the starting code got changed somehow. 

Here are the two startup Gcode scripts 

Gcode for working batman signal

; generated by Slic3r Prusa Edition 1.39.2-rc+win64 on 2018-05-07 at 12:30:16

;

; 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 Z0.600 F10200.000
;AFTER_LAYER_CHANGE
;0.2
G1 X80.915 Y99.515
G1 Z0.200
G1 E0.80000 F2100.00000
M204 S1000
G1 F1800

 
; generated by PrusaSlicer 2.2.0+win64 on 2020-05-04 at 03:07:54 UTC

;

; external perimeters extrusion width = 0.60mm
; perimeters extrusion width = 0.50mm
; infill extrusion width = 0.50mm
; solid infill extrusion width = 0.50mm
; top infill extrusion width = 0.45mm
; first layer extrusion width = 0.42mm

M73 P0 R695
M73 Q0 S705
M201 X1000 Y1000 Z1000 E8000 ; 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 (R), mm/sec^2
M205 X8.00 Y8.00 Z0.40 E4.50 ; sets the jerk limits, mm/sec
M205 S0 T0 ; sets the minimum extruding and travel feed rate, mm/sec
M107
M862.3 P "MK3SMMU2S" ; printer model check
M862.1 P0.4 ; nozzle diameter check
M115 U3.8.1 ; tell printer latest fw version
G90 ; use absolute coordinates
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

; Send the filament type to the MMU2.0 unit.
; E stands for extruder number, F stands for filament type (0: default; 1:flex; 2: PVA)
M403 E0 F0
M403 E1 F0
M403 E2 F0
M403 E3 F0
M403 E4 F0

;go outside print area
G1 Y-3.0 F1000.0
G1 Z0.4 F1000.0
; select extruder
T0
; initial load
G1 X55.0 E29.0 F1073.0
M73 Q0 S705
M73 P0 R694
G1 X5.0 E29.0 F1800.0
G1 X55.0 E8.0 F2000.0
G1 Z0.3 F1000.0
G92 E0.0
G1 X240.0 E25.0 F2200.0
G1 Y-2.0 F1000.0
G1 X55.0 E25 F1400.0
G1 Z0.20 F1000.0
G1 X5.0 E4.0 F1000.0
G92 E0.0

M221 S95
G92 E0.0
G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
M900 K30 ; Filament gcode
;BEFORE_LAYER_CHANGE
G92 E0.0
;0.2

G1 E-0.80000 F2100.00000
G1 Z0.600 F10800.000
;AFTER_LAYER_CHANGE
;0.2
G1 X9.499 Y37.938
G1 Z0.200
G1 E0.80000 F2100.00000
M204 S1000
G1 F1200.000
G1 X9.863 Y37.122 E0.02803

 
Gcode for the one that extrudes off the side of the plate continuously

; generated by PrusaSlicer 2.2.0+win64 on 2020-05-04 at 03:07:54 UTC

;

; external perimeters extrusion width = 0.60mm
; perimeters extrusion width = 0.50mm
; infill extrusion width = 0.50mm
; solid infill extrusion width = 0.50mm
; top infill extrusion width = 0.45mm
; first layer extrusion width = 0.42mm

M73 P0 R695
M73 Q0 S705
M201 X1000 Y1000 Z1000 E8000 ; 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 (R), mm/sec^2
M205 X8.00 Y8.00 Z0.40 E4.50 ; sets the jerk limits, mm/sec
M205 S0 T0 ; sets the minimum extruding and travel feed rate, mm/sec
M107
M862.3 P "MK3SMMU2S" ; printer model check
M862.1 P0.4 ; nozzle diameter check
M115 U3.8.1 ; tell printer latest fw version
G90 ; use absolute coordinates
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

; Send the filament type to the MMU2.0 unit.
; E stands for extruder number, F stands for filament type (0: default; 1:flex; 2: PVA)
M403 E0 F0
M403 E1 F0
M403 E2 F0
M403 E3 F0
M403 E4 F0

;go outside print area
G1 Y-3.0 F1000.0
G1 Z0.4 F1000.0
; select extruder
T0
; initial load
G1 X55.0 E29.0 F1073.0
M73 Q0 S705
M73 P0 R694
G1 X5.0 E29.0 F1800.0
G1 X55.0 E8.0 F2000.0
G1 Z0.3 F1000.0
G92 E0.0
G1 X240.0 E25.0 F2200.0
G1 Y-2.0 F1000.0
G1 X55.0 E25 F1400.0
G1 Z0.20 F1000.0
G1 X5.0 E4.0 F1000.0
G92 E0.0

M221 S95
G92 E0.0
G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
M900 K30 ; Filament gcode
;BEFORE_LAYER_CHANGE
G92 E0.0
;0.2

G1 E-0.80000 F2100.00000
G1 Z0.600 F10800.000
;AFTER_LAYER_CHANGE
;0.2
G1 X9.499 Y37.938
G1 Z0.200
G1 E0.80000 F2100.00000
M204 S1000
G1 F1200.000
G1 X9.863 Y37.122 E0.02803

Posted : 06/05/2020 4:41 pm
Neophyl
(@neophyl)
Illustrious Member
RE: Continuous extruding at the start of a print

Im not sure you copied those correctly, the listing you have that you say works has 2 sets of headers, one from an earlier prusa slicer version and the settings are for a 0.4 diameter nozzle, it then has a second set of settings for a 0.6mm nozzle and a MMU2 based printer.

The set you say doesnt work only has the setup for the MMU2 printer with 0.6 nozzle.

The top one with 2 sets cant be right.  What actual printer do you have ?  Is it a MK3 or do you have an MMU unit attached to it ?

The best way to work out whats happening is for you to go into prusa slicer and with one of your projects that does not work save the project as..... File>Save as.  This will save a .3mf file with your model and ALL of your settings, print, filament and printer.  Zip that project file up and attach the zip file here (forum doesnt accept 3mf but will a zip file).  That way we can see exactly what setting you have got configured.  

 

Posted : 06/05/2020 5:05 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Continuous extruding at the start of a print

@rseal88

Can we see a picture or two, of your printer please?, 
Particularly the top of your extruder housing where the filament goes in, 
this will help us ascertain which version it is!
probably safer to start there!

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 06/05/2020 6:39 pm
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