Posted by gwfami

Skeinforge just dumps plastic out August 25, 2013 01:39PM |
Registered: 6 years ago Posts: 9 |

Just started using skeinforge as a slicer, looking for greater detail than slic3r can make. Slices fine, but when the build begins to run, it just dumps out way too much plastic making a gooey mess. I can actually watch the line feed in at a rate of probably a couple of meters per minute.

I just calibrated skeinforge, as shown on youtube (http://www.youtube.com/watch?v=s3iXnLo0kYs). but it still is just pouring out the plastic.

I don't have a problem with slic3r doing this.

Any ideas?

I just calibrated skeinforge, as shown on youtube (http://www.youtube.com/watch?v=s3iXnLo0kYs). but it still is just pouring out the plastic.

I don't have a problem with slic3r doing this.

Any ideas?

Re: Skeinforge just dumps plastic out August 25, 2013 08:41PM |
Registered: 7 years ago Posts: 1,318 |

Try putting an extruder axis reset at the beginning of your gcode - G92 E0. This will reset that axis back to the 0 position which is usually what you want at the start of a new job. By default, skeinforge does not do this. I had a similar problem where it retracted an enormous amount at print start. The G92 fixed it for me.

Re: Skeinforge just dumps plastic out August 26, 2013 06:57AM |
Registered: 6 years ago Posts: 9 |

Re: Skeinforge just dumps plastic out August 29, 2013 01:01PM |
Registered: 6 years ago Posts: 9 |

Re: Skeinforge just dumps plastic out August 29, 2013 01:49PM |
Registered: 7 years ago Posts: 1,318 |

Re: Skeinforge just dumps plastic out August 29, 2013 03:03PM |
Registered: 9 years ago Posts: 352 |

gwfami Wrote:

-------------------------------------------------------

> I just calibrated skeinforge, as shown on youtube

> (http://www.youtube.com/watch?v=s3iXnLo0kYs). but

> it still is just pouring out the plastic.

Could you please tell us *how* you calibrated Skeinforge? don't want to see a video to know that and then can't try answering to your question…

François

-------------------------------------------------------

> I just calibrated skeinforge, as shown on youtube

> (http://www.youtube.com/watch?v=s3iXnLo0kYs). but

> it still is just pouring out the plastic.

Could you please tell us *how* you calibrated Skeinforge? don't want to see a video to know that and then can't try answering to your question…

François

Re: Skeinforge just dumps plastic out August 30, 2013 04:16PM |
Registered: 6 years ago Posts: 9 |

Certainly,

I went in, calculated the e offset, setup the carve and other parameters, entered the filament volume, and a few other minor things. I left most of the parameters alone.

Here's the first few lines of the g code. It's for a ring mustache (mustache ring?) from thingiverse called mo ring. Something simple to start with, I thought.

g code created by skeinforge.

G90

G21

M103

M105

M106

M140 S95.0

M141 S30.0

M142 S0.0

M113 S1.0

M108 S42.6

G1 X71.177 Y60.573 Z0.16 F60.0

G1 F798.0

G1 E0.0

G1 F60.0

M101

G1 X72.844 Y59.362 Z0.16 F384.0 E1.6179

G1 X75.184 Y58.32 Z0.16 F384.0 E3.6283

G1 X77.689 Y57.788 Z0.16 F384.0 E5.6388

G1 X80.249 Y57.788 Z0.16 F384.0 E7.6491

G1 X82.754 Y58.32 Z0.16 F384.0 E9.6596

G1 X85.094 Y59.362 Z0.16 F384.0 E11.67

G1 X87.165 Y60.867 Z0.16 F384.0 E13.6804

G1 X88.879 Y62.77 Z0.16 F384.0 E15.6909

G1 X90.159 Y64.988 Z0.16 F384.0 E17.7013

G1 X90.951 Y67.424 Z0.16 F384.0 E19.7118

G1 X91.218 Y69.97 Z0.16 F384.0 E21.7222

G1 X90.951 Y72.517 Z0.16 F384.0 E23.7326

G1 X90.159 Y74.953 Z0.16 F384.0 E25.743

G1 X88.879 Y77.17 Z0.16 F384.0 E27.7534

G1 X87.165 Y79.073 Z0.16 F384.0 E29.7639

G1 X86.784 Y79.35 Z0.16 F384.0 E30.1336

G1 X87.148 Y80.266 Z0.16 F384.0 E30.9075

G1 X89.156 Y80.082 Z0.16 F384.0 E32.4904

G1 X95.102 Y81.334 Z0.16 F384.0 E37.2606

G1 X97.398 Y83.397 Z0.16 F384.0 E39.6841

G1 X99.225 Y85.795 Z0.16 F384.0 E42.0507

G1 X100.072 Y88.527 Z0.16 F384.0 E44.2962

G1 X98.38 Y86.684 Z0.16 F384.0 E46.2604

G1 X96.403 Y85.658 Z0.16 F384.0 E48.0088

G1 X94.893 Y85.603 Z0.16 F384.0 E49.1955

G1 X90.568 Y86.521 Z0.16 F384.0 E52.6662

G1 X83.88 Y88.851 Z0.16 F384.0 E58.2264

G1 X83.008 Y89.037 Z0.16 F384.0 E58.9259

G1 X82.13 Y89.037 Z0.16 F384.0 E59.6159

G1 X81.27 Y88.854 Z0.16 F384.0 E60.3059

G1 X80.467 Y88.496 Z0.16 F384.0 E60.996

G1 X79.756 Y87.98 Z0.16 F384.0 E61.6859

G1 X78.969 Y87.106 Z0.16 F384.0 E62.6092

G1 X78.182 Y87.98 Z0.16 F384.0 E63.5323

G1 X77.471 Y88.496 Z0.16 F384.0 E64.2223

G1 X76.668 Y88.854 Z0.16 F384.0 E64.9124

G1 X75.808 Y89.037 Z0.16 F384.0 E65.6024

G1 X74.93 Y89.037 Z0.16 F384.0 E66.2924

G1 X74.058 Y88.851 Z0.16 F384.0 E66.9919

G1 X67.37 Y86.521 Z0.16 F384.0 E72.5522

G1 X63.045 Y85.603 Z0.16 F384.0 E76.0228

G1 X61.535 Y85.658 Z0.16 F384.0 E77.2095

G1 X59.558 Y86.684 Z0.16 F384.0 E78.958

G1 X57.866 Y88.527 Z0.16 F384.0 E80.9221

G1 X58.713 Y85.795 Z0.16 F384.0 E83.1676

G1 X60.54 Y83.397 Z0.16 F384.0 E85.5342

G1 X62.836 Y81.334 Z0.16 F384.0 E87.9577

G1 X68.782 Y80.082 Z0.16 F384.0 E92.728

G1 X71.054 Y80.29 Z0.16 F384.0 E94.5193

G1 X71.222 Y79.4 Z0.16 F384.0 E95.2308

G1 X70.773 Y79.073 Z0.16 F384.0 E95.6666

G1 X69.059 Y77.17 Z0.16 F384.0 E97.677

G1 X67.779 Y74.953 Z0.16 F384.0 E99.6875

G1 X66.987 Y72.517 Z0.16 F384.0 E101.6979

G1 X66.72 Y69.97 Z0.16 F384.0 E103.7083

G1 X66.987 Y67.424 Z0.16 F384.0 E105.7187

G1 X67.779 Y64.988 Z0.16 F384.0 E107.7291

G1 X69.059 Y62.77 Z0.16 F384.0 E109.7396

G1 X70.722 Y60.924 Z0.16 F384.0 E111.6903

G1 F798.0

G1 E111.6903

G1 F384.0

M103

I went in, calculated the e offset, setup the carve and other parameters, entered the filament volume, and a few other minor things. I left most of the parameters alone.

Here's the first few lines of the g code. It's for a ring mustache (mustache ring?) from thingiverse called mo ring. Something simple to start with, I thought.

g code created by skeinforge.

G90

G21

M103

M105

M106

M140 S95.0

M141 S30.0

M142 S0.0

M113 S1.0

M108 S42.6

G1 X71.177 Y60.573 Z0.16 F60.0

G1 F798.0

G1 E0.0

G1 F60.0

M101

G1 X72.844 Y59.362 Z0.16 F384.0 E1.6179

G1 X75.184 Y58.32 Z0.16 F384.0 E3.6283

G1 X77.689 Y57.788 Z0.16 F384.0 E5.6388

G1 X80.249 Y57.788 Z0.16 F384.0 E7.6491

G1 X82.754 Y58.32 Z0.16 F384.0 E9.6596

G1 X85.094 Y59.362 Z0.16 F384.0 E11.67

G1 X87.165 Y60.867 Z0.16 F384.0 E13.6804

G1 X88.879 Y62.77 Z0.16 F384.0 E15.6909

G1 X90.159 Y64.988 Z0.16 F384.0 E17.7013

G1 X90.951 Y67.424 Z0.16 F384.0 E19.7118

G1 X91.218 Y69.97 Z0.16 F384.0 E21.7222

G1 X90.951 Y72.517 Z0.16 F384.0 E23.7326

G1 X90.159 Y74.953 Z0.16 F384.0 E25.743

G1 X88.879 Y77.17 Z0.16 F384.0 E27.7534

G1 X87.165 Y79.073 Z0.16 F384.0 E29.7639

G1 X86.784 Y79.35 Z0.16 F384.0 E30.1336

G1 X87.148 Y80.266 Z0.16 F384.0 E30.9075

G1 X89.156 Y80.082 Z0.16 F384.0 E32.4904

G1 X95.102 Y81.334 Z0.16 F384.0 E37.2606

G1 X97.398 Y83.397 Z0.16 F384.0 E39.6841

G1 X99.225 Y85.795 Z0.16 F384.0 E42.0507

G1 X100.072 Y88.527 Z0.16 F384.0 E44.2962

G1 X98.38 Y86.684 Z0.16 F384.0 E46.2604

G1 X96.403 Y85.658 Z0.16 F384.0 E48.0088

G1 X94.893 Y85.603 Z0.16 F384.0 E49.1955

G1 X90.568 Y86.521 Z0.16 F384.0 E52.6662

G1 X83.88 Y88.851 Z0.16 F384.0 E58.2264

G1 X83.008 Y89.037 Z0.16 F384.0 E58.9259

G1 X82.13 Y89.037 Z0.16 F384.0 E59.6159

G1 X81.27 Y88.854 Z0.16 F384.0 E60.3059

G1 X80.467 Y88.496 Z0.16 F384.0 E60.996

G1 X79.756 Y87.98 Z0.16 F384.0 E61.6859

G1 X78.969 Y87.106 Z0.16 F384.0 E62.6092

G1 X78.182 Y87.98 Z0.16 F384.0 E63.5323

G1 X77.471 Y88.496 Z0.16 F384.0 E64.2223

G1 X76.668 Y88.854 Z0.16 F384.0 E64.9124

G1 X75.808 Y89.037 Z0.16 F384.0 E65.6024

G1 X74.93 Y89.037 Z0.16 F384.0 E66.2924

G1 X74.058 Y88.851 Z0.16 F384.0 E66.9919

G1 X67.37 Y86.521 Z0.16 F384.0 E72.5522

G1 X63.045 Y85.603 Z0.16 F384.0 E76.0228

G1 X61.535 Y85.658 Z0.16 F384.0 E77.2095

G1 X59.558 Y86.684 Z0.16 F384.0 E78.958

G1 X57.866 Y88.527 Z0.16 F384.0 E80.9221

G1 X58.713 Y85.795 Z0.16 F384.0 E83.1676

G1 X60.54 Y83.397 Z0.16 F384.0 E85.5342

G1 X62.836 Y81.334 Z0.16 F384.0 E87.9577

G1 X68.782 Y80.082 Z0.16 F384.0 E92.728

G1 X71.054 Y80.29 Z0.16 F384.0 E94.5193

G1 X71.222 Y79.4 Z0.16 F384.0 E95.2308

G1 X70.773 Y79.073 Z0.16 F384.0 E95.6666

G1 X69.059 Y77.17 Z0.16 F384.0 E97.677

G1 X67.779 Y74.953 Z0.16 F384.0 E99.6875

G1 X66.987 Y72.517 Z0.16 F384.0 E101.6979

G1 X66.72 Y69.97 Z0.16 F384.0 E103.7083

G1 X66.987 Y67.424 Z0.16 F384.0 E105.7187

G1 X67.779 Y64.988 Z0.16 F384.0 E107.7291

G1 X69.059 Y62.77 Z0.16 F384.0 E109.7396

G1 X70.722 Y60.924 Z0.16 F384.0 E111.6903

G1 F798.0

G1 E111.6903

G1 F384.0

M103

Re: Skeinforge just dumps plastic out August 30, 2013 06:18PM |
AdminRegistered: 12 years ago Posts: 7,822 |

Perhaps you set the filament diameter wrongly on the dimension tab. Should be the size of your filament going in. The E values look more like the amount of filament coming out.

[www.hydraraptor.blogspot.com]

[www.hydraraptor.blogspot.com]

Re: Skeinforge just dumps plastic out August 30, 2013 07:56PM |
Registered: 7 years ago Posts: 1,318 |

The only thing I noticed here is that you don't have the G92 E0. If you do manual extrusion prior to starting the print, you first E movement (G1 E0) could be meters away from where you left it. I know you said you tried it, and it might not be your problem, but I think it's a good idea to add it to your start code.

The E numbers you have seem very high - so the problem is in the slicer, not the printer - it's just doing what its told.

The E numbers you have seem very high - so the problem is in the slicer, not the printer - it's just doing what its told.

Re: Skeinforge just dumps plastic out August 30, 2013 08:28PM |
Registered: 6 years ago Posts: 9 |

Re: Skeinforge just dumps plastic out August 31, 2013 03:56AM |
AdminRegistered: 12 years ago Posts: 7,822 |

On the speed tab you must set all flow rates to the same value as the corresponding feed rate. Perhaps you have slowed down the first layer speed but kept the flow rate high.

[www.hydraraptor.blogspot.com]

[www.hydraraptor.blogspot.com]

Re: Skeinforge just dumps plastic out August 31, 2013 03:55PM |
Registered: 6 years ago Posts: 9 |

Re: Skeinforge just dumps plastic out August 31, 2013 05:42PM |
AdminRegistered: 12 years ago Posts: 7,822 |

If you use absolute E values then yes they increase as they are the total extruded so far. If you select relative E values on the Dimension tab then they are proportional to the XY distance moved.

If you send absolute E gcode to firmware configured for relative E it extrudes ever increasing amounts of plastic. However your E values are far too big anyway. They increase at a rate similar to the distance traveled whereas the filament should be fed into the extruder much more slowly that it comes out.

Since skeinforge is known to work correctly you must have some setting wrong. AFAIK the only things that affect it are on the Speed tab and the Dimension tab. When feed rate and flow rate are set the same Skienforge works out the volume of plastic needed for the specified layer height and filament width. It then uses the filament diameter to work out how far to feed it for a given XY move.

[www.hydraraptor.blogspot.com]

If you send absolute E gcode to firmware configured for relative E it extrudes ever increasing amounts of plastic. However your E values are far too big anyway. They increase at a rate similar to the distance traveled whereas the filament should be fed into the extruder much more slowly that it comes out.

Since skeinforge is known to work correctly you must have some setting wrong. AFAIK the only things that affect it are on the Speed tab and the Dimension tab. When feed rate and flow rate are set the same Skienforge works out the volume of plastic needed for the specified layer height and filament width. It then uses the filament diameter to work out how far to feed it for a given XY move.

[www.hydraraptor.blogspot.com]

Re: Skeinforge just dumps plastic out August 31, 2013 08:01PM |
Registered: 7 years ago Posts: 1,318 |

Yes - I agree with nophead here. It is a skeinforge setting. The slicer determines the volume of plastic it needs and works backward using the layer height and width/height ratio to calculate the amount to extrude.

I would think that these two parameters are the ones you need to check. I think at least one of them appears in two places for different situations. I'm not at my PC now to give you more definite answers.

I would think that these two parameters are the ones you need to check. I think at least one of them appears in two places for different situations. I'm not at my PC now to give you more definite answers.

Re: Skeinforge just dumps plastic out September 01, 2013 02:12PM |
Registered: 6 years ago Posts: 9 |

Progress!!

I triple checked the speed and dimensions tab and didn't see anything that might have caused the problem. What I did do, however, was to change the filament packing ratio from .4 to 1.5 (dimension tab).

Here's what it did.

ratio = 0.4 - really squishy, lots of plastic gobs, print head like a John Deere tracked tractor plow through plastic.

ratio = 1.0 - not as squishy, not as much plastic ooze, print head not like a hand plow through plastic.

ratio = 1.5 - no squishies, no plastic ooze, print head now not plowing at all.

I'll keep you up to date, the test print is supposed to take another 2 + hours to finish.

Thanks for your help.

I triple checked the speed and dimensions tab and didn't see anything that might have caused the problem. What I did do, however, was to change the filament packing ratio from .4 to 1.5 (dimension tab).

Here's what it did.

ratio = 0.4 - really squishy, lots of plastic gobs, print head like a John Deere tracked tractor plow through plastic.

ratio = 1.0 - not as squishy, not as much plastic ooze, print head not like a hand plow through plastic.

ratio = 1.5 - no squishies, no plastic ooze, print head now not plowing at all.

I'll keep you up to date, the test print is supposed to take another 2 + hours to finish.

Thanks for your help.

Re: Skeinforge just dumps plastic out September 01, 2013 02:41PM |
Registered: 6 years ago Posts: 9 |

Re: Skeinforge just dumps plastic out September 01, 2013 02:49PM |
Registered: 6 years ago Posts: 9 |

Re: Skeinforge just dumps plastic out September 01, 2013 03:45PM |
AdminRegistered: 12 years ago Posts: 7,822 |

Filament packing ratio should be 1 for the plastic you calibrated the E steps per mm with and slightly different for softer or harder plastics that feed at a slightly different rate. It should never be as high as 1.4 or as low as 0.4.

[www.hydraraptor.blogspot.com]

[www.hydraraptor.blogspot.com]

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