negative scar on layer start January 06, 2016 05:36PM |
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Re: negative scar on layer start January 06, 2016 05:47PM |
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Re: negative scar on layer start January 06, 2016 05:59PM |
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Re: negative scar on layer start January 06, 2016 11:57PM |
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Re: negative scar on layer start January 07, 2016 12:50AM |
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Re: negative scar on layer start January 07, 2016 03:10AM |
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Re: negative scar on layer start January 07, 2016 04:16AM |
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Re: negative scar on layer start January 07, 2016 04:21AM |
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Re: negative scar on layer start January 07, 2016 01:30PM |
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Re: negative scar on layer start January 07, 2016 02:30PM |
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JamesK
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slic3r just over extrude by default for me (and many others)
Yes, but it doesn't do it evenly. If you try and fight the slic3r bug with an extrusion multiplier you'll drive yourself nuts. If you're not confident in what slic3r is doing, then I'd recommend using different software.
Re: negative scar on layer start January 07, 2016 02:56PM |
Registered: 10 years ago Posts: 580 |
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robse
I have the impression that the negative scar appears right after the nozzle is idle for a few seconds during long moves
Re: negative scar on layer start January 09, 2016 05:08AM |
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Re: negative scar on layer start January 09, 2016 12:06PM |
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Re: negative scar on layer start January 23, 2016 09:46AM |
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Re: negative scar on layer start January 27, 2016 04:50PM |
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Re: negative scar on layer start January 27, 2016 10:48PM |
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Re: negative scar on layer start January 28, 2016 05:00AM |
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Re: negative scar on layer start January 28, 2016 07:06AM |
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The less current the motor has, the more the problem arise. I did set the current to the maximum the hardware allowed before malfunctioning (clicks and so on)
Re: negative scar on layer start January 28, 2016 12:59PM |
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Re: negative scar on layer start January 28, 2016 02:45PM |
Registered: 8 years ago Posts: 14 |
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JamesK
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The less current the motor has, the more the problem arise. I did set the current to the maximum the hardware allowed before malfunctioning (clicks and so on)
Could you expand on that a bit? 'clicks' is normally a symptom of not enough current to the motors, not too much. The primary symptom of too much current is overheating, either of the stepper motor or the stepper driver. A typical direct drive extruder like you are using is capable of grinding away the filament before it stalls when supplied with sufficient current, so my thought is that you have the driver set for too little current.
Re: negative scar on layer start January 28, 2016 02:58PM |
Registered: 8 years ago Posts: 14 |
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Paul Wanamaker
I took a portion of that image, cropped and enhanced it:
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Paul Wanamaker
So here are my thoughts:
- You could try rotating the part by 45 degrees and reprint. This will help determine if it is related to bed movement or extrusion. If it is due to bed movement, then with the results should be different. If it is due to extrusion then there should be no change.
- Without the Gcode it is not possible to determine much more about the motions. Please turn on verbose gcode (output options) and reslice, then post a link to the gcode. I can run it through my gcode debugger/visualizer and see line by line what is happening.
- I'm still guessing towards a mechanical issue (belt not tight enough, Y axis acceleration, etc.)
- In Slic3r, with expert settings on, on the printing tab, speed, Acceleration control: you can put in your default acceleration, and the a lower acceleration for perimeters. This helps to control ringing.
Re: negative scar on layer start January 28, 2016 04:48PM |
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Re: negative scar on layer start January 29, 2016 02:00AM |
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G1 X97.969 Y114.225 E263.16113 F3000.000 ; 0.294mm infill 8.848 mm3/s G1 X96.950 Y114.225 E263.23865 ; 1.019mm infill 8.838 mm3/s G1 X96.950 Y113.688 E263.27949 ; 0.537mm infill 8.835 mm3/s G1 X97.893 Y113.941 E263.35374 ; 0.976mm infill 8.835 mm3/s G1 Z3.100 F7800.000 ; 0.300mm Z move to next layer (10) G1 X122.990 Y115.165 F7800.000 ; 25.127mm move to first perimeter point G1 X96.010 Y115.165 E264.78218 F1200.000 ; 26.980mm perimeter 2.460 mm3/s G1 X96.010 Y102.835 E265.43498 ; 12.330mm perimeter 2.460 mm3/s G1 X122.990 Y102.835 E266.86342 ; 26.980mm perimeter 2.460 mm3/s
Re: negative scar on layer start January 29, 2016 07:08AM |
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Re: negative scar on layer start January 29, 2016 01:39PM |
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Re: negative scar on layer start February 03, 2016 03:18PM |
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Re: negative scar on layer start February 03, 2016 03:30PM |
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Re: negative scar on layer start February 03, 2016 05:38PM |
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JamesK
That's interesting. Why did the hollow cubes not pause between layers? Perhaps you used the spiral vase setting? If you just used 1 perimeter and no-infill you should have a test where the nozzle still comes to a stop after each layer and rises to the next Z.
Sorry for not going back through previous posts - did we check that the extruder grub screw(s) are tight and the gear not slipping? That can produce some very strange artefacts.
Re: negative scar on layer start February 03, 2016 05:48PM |
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Re: negative scar on layer start February 03, 2016 05:57PM |
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