Continuous extruding at the start of a print  

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

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. 

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

RE: Continuous extruding at the start of a print

@joantabb

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

RE: Continuous extruding at the start of a print

@joantabb

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

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

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.  

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