Re: Help, internal size of part(s) too small... June 09, 2014 09:31AM |
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Re: Help, internal size of part(s) too small... June 09, 2014 06:55PM |
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to-the-nth
arildj78 - Seems like Sound is willing to make enhancements if we can feed him algorithms. Not sure that collecting machine/filament/op point data gets us closer to new features.
Re: Help, internal size of part(s) too small... June 10, 2014 08:06AM |
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Re: Help, internal size of part(s) too small... June 10, 2014 11:05AM |
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Re: Help, internal size of part(s) too small... June 10, 2014 01:36PM |
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Re: Help, internal size of part(s) too small... June 10, 2014 02:05PM |
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Re: Help, internal size of part(s) too small... June 10, 2014 03:26PM |
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Re: Help, internal size of part(s) too small... June 10, 2014 03:58PM |
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Re: Help, internal size of part(s) too small... June 10, 2014 04:44PM |
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Re: Help, internal size of part(s) too small... June 10, 2014 05:05PM |
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Re: Help, internal size of part(s) too small... June 10, 2014 06:59PM |
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Re: Help, internal size of part(s) too small... June 10, 2014 07:12PM |
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Re: Help, internal size of part(s) too small... June 10, 2014 07:16PM |
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Re: Help, internal size of part(s) too small... June 11, 2014 02:46AM |
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Re: Help, internal size of part(s) too small... June 11, 2014 05:17AM |
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justcurious
If you read the slic3r documentation that was added by @sound here: [manual.slic3r.org], you would see that for a standard user the "correct" math is used with rounded rectangles and only if W/T<1 another model (rectangle) is used.
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justcurious
I might think that not many pepole other than Nophead is using a flow where width is smaller than nozzle width, but if that is what it takes to get better results, why not, but saying that Slic3r is doing wrong here is to go easy with facts?
Your animation is impressive but does not show anything about geometries if W/T<1
Re: Help, internal size of part(s) too small... June 11, 2014 05:46AM |
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Re: Help, internal size of part(s) too small... June 11, 2014 06:43AM |
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Re: Help, internal size of part(s) too small... June 11, 2014 07:15AM |
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Re: Help, internal size of part(s) too small... June 11, 2014 07:27AM |
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Re: Help, internal size of part(s) too small... June 11, 2014 07:33AM |
Registered: 11 years ago Posts: 88 |
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nophead
I think your confusion is that the drawing shows a cross section of the nozzle and a cross section of the resulting extrudate together, not a section of what the extrudate would look like at the centre of the nozzle. The filament comes out the nozzle as a vertical cylinder and then bends through 90 degrees to lay down as a horizontal cylinder.
Re: Help, internal size of part(s) too small... June 11, 2014 07:35AM |
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Re: Help, internal size of part(s) too small... June 11, 2014 08:00AM |
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Re: Help, internal size of part(s) too small... June 11, 2014 08:02AM |
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Re: Help, internal size of part(s) too small... June 11, 2014 08:18AM |
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Concluded from the above thread, from the start, i think that it has been verified that Slic3R selects correct path as expected and for W/T>1 it is probably selecting proper flow as well. question is would flow be better for W/T=1 and W/T<1 if the same formula was used? I do not know. i do not even know if the formula used at present version is failing!
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if i should always select W/T=1.5 i would certainly get in troubles. my nozzle is 0.35 and I mostly print at 0.2mm that would say that if W/T should be 1,5, I should select extrusion width of 0.3mm, but what if i select layerheight of 0.1mm? that would give me extrusion width of 0.15mm, that does not make sense, does it? and it does probably not care which formula is used anyway.
Could anybody clarify my frustrations?
Re: Help, internal size of part(s) too small... June 11, 2014 08:23AM |
Registered: 11 years ago Posts: 88 |
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QuackingPlums
For printing purposes I think we are more interested in the cross-section as it leaves the trailing edge of the nozzle (nozzle aperture removed to illustrate that this is the trailing edge):
At this point, the plastic is securely adhered to the plate/object below and the movement of the nozzle/bed has dragged the plastic into the squashed cylinder that Chris describes.
Re: Help, internal size of part(s) too small... June 11, 2014 08:43AM |
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Re: Help, internal size of part(s) too small... June 11, 2014 08:58AM |
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dzach
a ratio at which the formulas I used start to fit closely the shape of the plastic.
Re: Help, internal size of part(s) too small... June 11, 2014 09:04AM |
Admin Registered: 16 years ago Posts: 7,872 |
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justcurious
you did not answer my question whether you think Slic3r would be performing more correct for W/T<1 if the same algorhitm was used, but if you always select extrusion width greater than nozzlewidth it of course is nothing but a theorethical question with no practical value, is that correct?
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justcurious
We somehow were untracked here so let us get back to the original issue of object sizes and the new possibilities that Slic3R is offering with latest version despite the above discussion on performance of algorhitms:
1. XY size compensation, i wonder how that is going to be used for solving problems mentioned above or is it not needed, now we know that more carefull selection of params eliminate problems ;-).
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justcurious
2. variabel external perimeter extrusion width, which may have influence on dimensional print accuracy.
Re: Help, internal size of part(s) too small... June 11, 2014 09:24AM |
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Re: Help, internal size of part(s) too small... June 12, 2014 06:19PM |
Registered: 12 years ago Posts: 43 |
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nophead
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Concluded from the above thread, from the start, i think that it has been verified that Slic3R selects correct path as expected and for W/T>1 it is probably selecting proper flow as well. question is would flow be better for W/T=1 and W/T<1 if the same formula was used? I do not know. i do not even know if the formula used at present version is failing!
No Sli3r only uses the correct formula when W - T > nozzle.
# die "--layer-height can't be greater than --nozzle-diameter\n" # if grep $self->layer_height > $_, @{$self->nozzle_diameter}; # die "First layer height can't be greater than --nozzle-diameter\n" # if grep $self->get_value('first_layer_height') > $_, @{$self->nozzle_diameter};