Re: Help, internal size of part(s) too small... December 18, 2013 08:34PM |
Registered: 12 years ago Posts: 2,947 |
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tmorris9
OK, I know just enough about gcode to be dangerous. True my assessment of the tool patch is based on assumption as no setting I have tried (hundreds and all I have seen across several boards) produces the correct size. I admit that it was a logical conclusion rather than fact.
So if you look at the enclosed image, I have highlighted an inner square hole (I wanted to eliminate issues with radius problems for this example) can you tell me based on the highlighted info what the size of the hole is in this object. And if possible explain to me how you calculate the size using the gcode?
Thanks!
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Re: Help, internal size of part(s) too small... December 18, 2013 08:37PM |
Registered: 10 years ago Posts: 1,171 |
Re: Help, internal size of part(s) too small... December 18, 2013 08:39PM |
Registered: 10 years ago Posts: 1,171 |
Re: Help, internal size of part(s) too small... December 18, 2013 08:49PM |
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Re: Help, internal size of part(s) too small... December 18, 2013 09:02PM |
Admin Registered: 16 years ago Posts: 7,872 |
Re: Help, internal size of part(s) too small... December 18, 2013 09:24PM |
Registered: 12 years ago Posts: 2,947 |
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tmorris9
Very interesting, here is the same basic info once sliced in Kisslicer. A few things I noticed right away are that Kisslicer lays down the very inner perimeter first while Slic3r lays down the inside inner perimeter first. Next is that slic3r used 4 lines to create the inner perimeter while Kiss was like 21 or 22 lines to create the same 4 lines of perimeter. I wonder if either of these could be an issue as to why slic3r won't make the right sized holes?
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Re: Help, internal size of part(s) too small... December 18, 2013 09:45PM |
Registered: 10 years ago Posts: 1,171 |
Re: Help, internal size of part(s) too small... December 19, 2013 12:19AM |
Registered: 12 years ago Posts: 2,947 |
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tmorris9
The hole looks odd as it was taken at an angle. But yes it's a 10mm hole and the nozzle is .35mm
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Re: Help, internal size of part(s) too small... December 19, 2013 06:12AM |
Admin Registered: 16 years ago Posts: 7,872 |
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tmorris9
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nophead
I could work it out but I would need to know the layer height to work out the filament width from the E numbers. It isn't anything to do with the nozzle width.
My layer height was .2mm
Re: Help, internal size of part(s) too small... December 19, 2013 04:53PM |
Registered: 10 years ago Posts: 1,171 |
Re: Help, internal size of part(s) too small... December 19, 2013 05:03PM |
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Re: Help, internal size of part(s) too small... December 19, 2013 06:31PM |
Registered: 12 years ago Posts: 2,947 |
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tmorris9
Sublime : .35mm nozzle -0- (default) extrusion width though I have tried others.
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Re: Help, internal size of part(s) too small... December 19, 2013 07:10PM |
Admin Registered: 16 years ago Posts: 7,872 |
Re: Help, internal size of part(s) too small... December 19, 2013 07:58PM |
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Re: Help, internal size of part(s) too small... December 19, 2013 08:27PM |
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Re: Help, internal size of part(s) too small... December 19, 2013 08:41PM |
Registered: 13 years ago Posts: 1,092 |
Re: Help, internal size of part(s) too small... December 19, 2013 09:10PM |
Registered: 10 years ago Posts: 1,171 |
Re: Help, internal size of part(s) too small... December 19, 2013 09:18PM |
Registered: 10 years ago Posts: 1,171 |
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Cefiar
tmorris9: Are you completely sure that your machine moves 10mm when you tell it to move 10mm in X and Y?
Marlin for example comes with the default value for X and Y steps of 78.7402 (which is for the Ultimaker). Using this on my old machine, 10mm was actually about 9.8mm. Turned out that the value I needed to use was exactly 80. The difference in my case isn't huge, but perhaps your machine is different.
Re: Help, internal size of part(s) too small... December 19, 2013 09:36PM |
Registered: 12 years ago Posts: 2,947 |
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Re: Help, internal size of part(s) too small... December 19, 2013 09:54PM |
Registered: 10 years ago Posts: 1,171 |
Re: Help, internal size of part(s) too small... December 19, 2013 10:09PM |
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Re: Help, internal size of part(s) too small... December 19, 2013 11:58PM |
Registered: 13 years ago Posts: 1,092 |
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tmorris9
Quote
Cefiar
tmorris9: Are you completely sure that your machine moves 10mm when you tell it to move 10mm in X and Y?
Marlin for example comes with the default value for X and Y steps of 78.7402 (which is for the Ultimaker). Using this on my old machine, 10mm was actually about 9.8mm. Turned out that the value I needed to use was exactly 80. The difference in my case isn't huge, but perhaps your machine is different.
Not 100% sure. I bought my machine "pre calibrated" from a reputable source, he use to be an automotive engineer and worked with calibration of milling machines and such. And the fact that the outsides come out near perfect (+/- .02mm) I would think it's right. My machine came with Repetier firmware. I noticed the firmware is older 0.62 VS. the latest 0.83. Not sure if that would make a difference. I am not very versed on what all is involved in updating it and I do use my printer for important stuff so I can't afford to mess it up. Don't know if I should try to upgrade it.
Besides, lets assume that my printer is at fault, why would so many other people be suffering the same problem?
Re: Help, internal size of part(s) too small... December 20, 2013 01:21AM |
Registered: 10 years ago Posts: 1,171 |
Re: Help, internal size of part(s) too small... December 20, 2013 02:00AM |
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Re: Help, internal size of part(s) too small... December 20, 2013 05:11AM |
Admin Registered: 16 years ago Posts: 7,872 |
Re: Help, internal size of part(s) too small... December 20, 2013 11:54AM |
Admin Registered: 16 years ago Posts: 7,872 |
Re: Help, internal size of part(s) too small... December 20, 2013 03:10PM |
Registered: 12 years ago Posts: 2,947 |
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Re: Help, internal size of part(s) too small... December 20, 2013 03:26PM |
Admin Registered: 16 years ago Posts: 7,872 |
Re: Help, internal size of part(s) too small... December 20, 2013 03:56PM |
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Re: Help, internal size of part(s) too small... December 20, 2013 06:54PM |
Registered: 13 years ago Posts: 1,092 |
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Sublime
@ Nophead
Thanks for doing the maths. At least we now know it places the paths in the same place as other slicers do which is half the width of a square extrusion profile. This leaves us with even more of a mystery, why can people get the correct size holes with other slicers like Kisslicer? Is it because of the order it does hole perimeters? Is this an adjustable setting in Slic3r? Does the problem exist if there is only 1 perimeter?
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Sublime
@tmorris9
Yes that is basically how you check calibration. You can also clamp one end of your calipers to the bed/carriage and the other end to the frame or even easier use a dial gauge.