Weird issue with filament unloading after mesh leveling
 
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Weird issue with filament unloading after mesh leveling  

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Furt1veOne
(@furt1veone)
New Member
Weird issue with filament unloading after mesh leveling

I had the same problem last week and was able to print a few things with no issues and my gremlin is back. I load a print from the SD card and after it heats up and does the mesh leveling thing, it unloads the filament before the first line on the front corner.

Thought it was retracting somehow, but I put my finger along the filament a couple times and notice it's completely ejecting the filament.

Is there something simple I'm missing? I'm using S3D and the .fff file provided from here. I've double checked the scripts to make sure they haven't been altered.

Thank you ahead of time for any help. It's frustrating when a gremlin shows up and you can't seem to figure it out on your own.

Respondido : 26/10/2016 3:15 am
Furt1veOne
(@furt1veone)
New Member
Topic starter answered:
Re: Weird issue with filament unloading after mesh leveling

Just thought of something I left out. The same gcode file on the SD card is messing up now that worked before.

Seems weird the same gcode file on the same SD card can work fine and then spit out the filament another time. Any ideas?

Respondido : 27/10/2016 3:13 am
Nigel
(@nigel)
Honorable Member
Re: Weird issue with filament unloading after mesh leveling

Are you using and have loaded the setting file from here? For Simplyfy3d

http://shop.prusa3d.com/forum/download/file.php?id=2896

The above settings work well for me when using Simplyfy3d. I do not have the issues you have. However the settings provided by Prusa Research are known to be not as good as for other slicers out there, mostly free.

I had a print that Simplyfy3d parsed, but was unprintable. I tried passing the stl file through nettfab, it didn't show the 3d print as it should be. I used Prusas Slic3r software and used supports and a raft and got a viable print eventually, that looked like the image of the stl file. But is still not right.

Nigel
Life is keeping interested and excited by knowledge and new things.

Respondido : 27/10/2016 4:38 am
brian.h5
(@brian-h5)
New Member
Re: Weird issue with filament unloading after mesh leveling

Did you ever find the cause of this?? I'm experiencing the same issue. Also using Simplify3d. Seems to be happening randomly.

Respondido : 12/12/2016 8:36 pm
richard.m8
(@richard-m8)
Active Member
Re: Weird issue with filament unloading after mesh leveling

Start script add the G92 E0. Worked for me

M115 U3.0.7 ; use the latest firmware version
G28 W ; home all axes without mesh bed leveling
G80 ; run mesh bed leveling routine
G1 Y-3.0 F1000.0 ; prepare to prime
G92 E0 ; reset extrusion distance
G1 X60.0 E9.0 F1000.0 ; priming
G1 X100.0 E12.5 F1000.0 ; priming

Respondido : 13/12/2016 1:28 am
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Weird issue with filament unloading after mesh leveling

The actual reason why this happens is simply because there is a GCode in the wrong place.

Before issuing any "Move E" instruction you must set the extruder to relative mode:

G28 W ; Home all (no calbration)
G80 ; mesh bed levelling
M83 ; Relative extruder
G1 Y-3.0 X50.0 F1000.0 ; go outside print area
...

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…

Respondido : 13/12/2016 6:44 am
StephanK
(@stephank)
Reputable Member
Re: Weird issue with filament unloading after mesh leveling

M83 (or M82) is set by S3D automatically before executing the start script depending on your selection here:

Or in code:

; allowThinWallGapFill,1
; thinWallAllowedOverlapPercentage,25
; horizontalSizeCompensation,0
G90
M83 ; <--------- here it is
M106 S0
M140 S50
M190 S50
M104 S200 T0
M109 S200 T0
; ====== Start script starts below here ==========
M115 U3.0.8 ; tell the printer latest firmware version available
G28 W ; home all without mesh bed level
G80 ; mesh bed leveling
G1 Y-3.0 F1000.0 ; go outside printing area
G92 E0 ; reset extrusion distance
G1 X60.0 E9.0 F1000.0 ; intro line
G1 X100.0 E12.5 F1000.0 ; intro line

Respondido : 14/12/2016 1:43 am
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