From SFACT to Skeinforge50 Extrusion on the run.

I used SFACT with great succes, my mendel90 was delivering nice prints.
Yesterday i tried to switch over to skeinforge50, so i carefully set all the settings (by hand) from SFACT to skeinforge50. It all looks fine, exept that the extrunsion is way to much. E values of 4 seen, where i expect values around E0.2.

Is there some setting i completely overlooked? Or needs skeinforge50 a complete recalibration?

I have the following settings (copied from my SFACT):
Dimension:
filament diameter: 2.95
Filament packing density: 1.14

Speed:
Feed rate mm/s: 60
Flow Rate Setting (this is not available in SFACT):
- Default 210, results very high E values.
- As in manual, 60, results in value as described above
- 0.5, beter but still to high E values.

I use Nopheads Mendel90 with Marlin firmware and stepper extruder.

You cant use SFACT settings in Skeinforge. SFACT calculates many things internally.. So dont do it. use the latest one from github. It should be SF50 based.

Edited 1 time(s). Last edit at 06/12/2013 08:40AM by ahmetcemturan.

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Manufacturer of low tolerance Filaments PLA, ABS, ASA, PETG, TPU, PA, PVA,
[www.miafilament.com]
[github.com]

If you want to use Skeinforge50 the settings for it are provided with the kit. Are you sure you selected relative extrusion as 4mm would be a lot of filament.

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[www.hydraraptor.blogspot.com]

thanks for you response
@ahmetcemturan, I am aware of that, therefore i manually typed over my settings like filament diameter, filement packing density and speed.

@ nophead: I use absolute extrusion, but i get values as below, and yes i have a lot of extrusion, thats the problem :

G1 X-11.52 Y10.116 Z0.36 F759.0155 E2.6173
G1 X-10.08 Y10.116 Z0.36 F759.0155 E2.8036
G1 X-10.08 Y-10.116 Z0.36 F759.0155 E5.4209
G1 X-8.64 Y-10.116 Z0.36 F759.0155 E5.6071
G1 X-8.64 Y10.116 Z0.36 F759.0155 E8.2244
G1 X-7.2 Y10.116 Z0.36 F759.0155 E8.4107
G1 X-7.2 Y-10.116 Z0.36 F759.0155 E11.028
G1 X-5.76 Y-10.116 Z0.36 F759.0155 E11.2143
G1 X-5.76 Y10.116 Z0.36 F759.0155 E13.8316
G1 X-4.32 Y10.116 Z0.36 F759.0155 E14.0179
G1 X-4.32 Y-10.116 Z0.36 F759.0155 E16.6352

Edited 1 time(s). Last edit at 06/12/2013 09:09AM by Joost-b.

The extrusion volume in SF is calculated from the filament diameter but the feed rate and flow rate multipliers on the speed tab affect it. You have to keep them both the same.

Edited 1 time(s). Last edit at 06/12/2013 10:09AM by nophead.

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[www.hydraraptor.blogspot.com]

I put both feedrate and flowrate on the default value of 16.
In Dimension i have the following settings:
filament diameter: 2.95
Filament packing density: 1.14

If i slice the 20mm cube i get the Gcode below.
The first part must familiar for Nophead, but an extrusion of 31.88mm for only the skirt is maybe to much.

M82
G28
G1 X5.0 Y98.0 F9000
G1 Z0.05
M104 S200
M190 S110
M109 S236
G92 E0
G1 E2.5 F50
G1 E-1.0 F1200
G1 X40.0 F4000
G1 Z0.3
G90
G21
M113 S1.0
M108 S40.0
G1 X-20.07 Y15.739 Z0.18 F7800.0
G1 F1800.0
G1 E1.51
G1 F7800.0
M101
G1 X-20.048 Y15.778 Z0.18 F480.0 E1.512
G1 X-20.027 Y15.817 Z0.18 F800.0 E1.5133
G1 X-20.005 Y15.856 Z0.18 F960.0 E1.5143
G1 X-18.424 Y18.702 Z0.18 F960.0 E1.589
G1 X18.424 Y18.702 Z0.18 F106.6667 E9.1985
G1 X20.07 Y15.739 Z0.18 F106.6667 E9.8983
G1 X20.07 Y-15.739 Z0.18 F106.6667 E16.399
G1 X18.424 Y-18.702 Z0.18 F106.6667 E17.0988
G1 X-18.424 Y-18.702 Z0.18 F106.6667 E24.7083
G1 X-20.07 Y-15.739 Z0.18 F106.6667 E25.4082
G1 X-20.07 Y15.606 Z0.18 F106.6667 E31.8813
G1 F1800.0
G1 E30.3813
G1 F106.6667
M103
G1 X-20.07 Y15.673 Z0.18 F53.3334
G1 X-20.07 Y15.739 Z0.18 F17.7778
M108 S40.0
G1 X-14.419 Y-14.477 Z0.18 F7800.0
G1 F1800.0
G1 E31.8913
G1 F7800.0
M101
G1 X-14.4 Y-14.58 Z0.18 F960.0 E31.8937
G1 X-14.4 Y-14.536 Z0.18 F480.0 E31.8957
G1 X-14.4 Y-14.491 Z0.18 F800.0 E31.897
G1 X-14.4 Y-14.447 Z0.18 F960.0 E31.898
G1 X-14.4 Y14.58 Z0.18 F960.0 E32.564
G1 X-13.8 Y14.58 Z0.18 F106.6667 E32.6879
G1 X-13.8 Y-14.58 Z0.18 F106.6667 E38.7097
G1 X-13.2 Y-14.58 Z0.18 F106.6667 E38.8336
G1 X-13.2 Y14.58 Z0.18 F106.6667 E44.8554
G1 X-12.6 Y14.58 Z0.18 F106.6667 E44.9793
G1 X-12.6 Y-14.58 Z0.18 F106.6667 E51.001
G1 X-12.0 Y-14.58 Z0.18 F106.6667 E51.1249
G1 X-12.0 Y14.58 Z0.18 F106.6667 E57.1467
G1 X-11.4 Y14.58 Z0.18 F106.6667 E57.2706
G1 X-11.4 Y-14.58 Z0.18 F106.6667 E63.2924
G1 X-10.8 Y-14.58 Z0.18 F106.6667 E63.4163
G1 X-10.8 Y14.58 Z0.18 F106.6667 E69.4381
G1 X-10.2 Y14.58 Z0.18 F106.6667 E69.562
G1 X-10.2 Y-14.58 Z0.18 F106.6667 E75.5837
G1 X-9.6 Y-14.58 Z0.18 F106.6667 E75.7076
G1 X-9.6 Y14.58 Z0.18 F106.6667 E81.7294
G1 X-9.0 Y14.58 Z0.18 F106.6667 E81.8533
G1 X-9.0 Y-14.58 Z0.18 F106.6667 E87.8751
G1 X-8.4 Y-14.58 Z0.18 F106.6667 E87.999
G1 X-8.4 Y14.58 Z0.18 F106.6667 E94.0208
G1 X-7.8 Y14.58 Z0.18 F106.6667 E94.1447
G1 X-7.8 Y-14.58 Z0.18 F106.6667 E100.1664
G1 X-7.2 Y-14.58 Z0.18 F106.6667 E100.2904
G1 X-7.2 Y14.58 Z0.18 F106.6667 E106.3121
G1 X-6.6 Y14.58 Z0.18 F106.6667 E106.436
G1 X-6.6 Y-14.58 Z0.18 F106.6667 E112.4578
G1 X-6.0 Y-14.58 Z0.18 F106.6667 E112.5817
G1 X-6.0 Y14.58 Z0.18 F106.6667 E118.6035
G1 X-5.4 Y14.58 Z0.18 F106.6667 E118.7274
G1 X-5.4 Y-14.58 Z0.18 F106.6667 E124.7492
G1 X-4.8 Y-14.58 Z0.18 F106.6667 E124.8731
G1 X-4.8 Y14.58 Z0.18 F106.6667 E130.8948
G1 X-4.2 Y14.58 Z0.18 F106.6667 E131.0187
G1 X-4.2 Y-14.58 Z0.18 F106.6667 E137.0405
G1 X-3.6 Y-14.58 Z0.18 F106.6667 E137.1644
G1 X-3.6 Y14.58 Z0.18 F106.6667 E143.1862

It doesn't matter what value you have for feed rate and flow rate as long as they are both the same and the first layer and perimeter multipliers should have feed and flow the same, or nearly the same.

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[www.hydraraptor.blogspot.com]

I attached screenshots with my settings.
Is there anything else which can make such a difference in e values? Maybe i completely overlook things.

You have your flow rate multipliers 2.5 times bigger than the feed rate multipliers so you should get 2.5 times too much filament on the first layer and 6.25 times too much on the first layer outline. The feed and flow multipliers need to be the same to keep flow in sync with feed.

Edited 1 time(s). Last edit at 06/12/2013 01:07PM by nophead.

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[www.hydraraptor.blogspot.com]

Nophead,
Thank you very much. I put all the values to 1 now and the results look much better.
I assume that the base flow rate multiplierr is also involved in this.
Flow rate * first layer flow rate multiplier * base flow rate multiplier.

If you have them all at 1 then outlines and infill will be the same speed. It is more normal to have them all at something like 0.5 so outlines are half the speed of infill and first layer is half of that.

The base parameters are in raft and refer to the bottom layer of the raft I think. Regardless, whatever you modify feed rate by you need to modify flow rate by the same fact to keep them in sync.

Edited 1 time(s). Last edit at 06/12/2013 03:42PM by nophead.

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[www.hydraraptor.blogspot.com]