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Top layer wont print

Posted by P4d0uch 
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P4d0uch
Top layer wont print
September 10, 2014 06:19AM
As you can see on the pictures the prints are unfinished and i can see the infill. Can someone tell me what is wrong with my settings? I use Repetier-host and Slic3r 1.1.7.

Thanks for any suggestion
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Attachments:
open | download - 20140910_120326.jpg (583.6 KB)
open | download - 20140910_120320.jpg (489.2 KB)
Floyd
Re: Top layer wont print
September 10, 2014 09:12AM
It looks like you have more issues than just missing the top layers...
Try another slicer like Cura and see what your results are.

I dont even use Slic3r anymore because of all the bugs and issues.
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P4d0uch
Re: Top layer wont print
September 10, 2014 09:32AM
I've got the printer for 4 days. It needs some calibration. Ok i will try cura. Thanks
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chngyian
Re: Top layer wont print
September 10, 2014 11:15AM
It looks really chunky. Maybe you can start by making sure the extrusion width and layer height is correct?
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Floyd
Re: Top layer wont print
September 10, 2014 01:20PM
Quote
P4d0uch
I've got the printer for 4 days. It needs some calibration. Ok i will try cura. Thanks
Why try to print anything without calibrating first?
Calibrate then try to worry about slicing errors.
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P4d0uch
Re: Top layer wont print
September 10, 2014 02:22PM
I was not clear. I calibrated the x,y, and z axes and the extruder steps too, but I dont know where to find the extursion width in Cura. I found that these two parts should fit in each other. But the smaller one is way bigger then it should be. I have got this printer with 0.7 nozzle. Btw the top layer is fixed when I use Cura
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Floyd
Re: Top layer wont print
September 10, 2014 05:29PM
Ive adjusted the flow rate in Cura to help with that. At 100% I was uverextruding even with my E steps correct. Now at 90% its much better.

Glad Cura corrected the problem on the layer. Its my go to slicer.
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P4d0uch
Re: Top layer wont print
September 11, 2014 01:43AM
Ok i will try the flow rate. I will let you know. Thank you
//edit1: the flow rate made prints better but the major problem was the shell thickness. The walls are ok now.

edit2: i have another problem now. I cant level the bed. The z-axis is shifted or something because when i set my z to 0 and my nozzle is in correct position on every 4 corners the print is just mess. The nozzle is too high.

edit3: my latest prints. the dimensions are almost perfect the y axis is spot on and the x-axis is just 0.1mm off. I am happy now smiling smiley

Edited 3 time(s). Last edit at 09/11/2014 07:59AM by P4d0uch.
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Attachments:
open | download - 20140911_134121.jpg (423 KB)
open | download - 20140911_134707.jpg (288.2 KB)
open | download - 20140911_134737.jpg (328.2 KB)
Floyd
Re: Top layer wont print
September 11, 2014 08:43AM
Still looks like you are extruding too much.
What did you set your % flow rate to?
Might try 2-4% lower and try again.
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P4d0uch
Re: Top layer wont print
September 11, 2014 08:45AM
I'm at 98%. I will try 95 or 96 when i get home.
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P4d0uch
Re: Top layer wont print
September 11, 2014 03:50PM
I was wrong the last print was on 100% I didnt save the settings. This one is 96% flow and 20% honeycomb infill
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Attachments:
open | download - 20140911_213716.jpg (553.5 KB)
open | download - 20140911_213645.jpg (579.2 KB)
open | download - 20140911_213744.jpg (554.6 KB)
Floyd
Re: Top layer wont print
September 11, 2014 04:02PM
Are those corners suppose to be rounded like that?
Looks like you might have to turn your acceleration and jerk settings up a bit to get cleaner corners.
What speed were you printing those at and at what temp?
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P4d0uch
Re: Top layer wont print
September 11, 2014 04:08PM
no the corners shouldnt be rounded. the speed was: Print speed: 40, Outer Perimeter Speed: 40, Infill 53. at 220 degrees without heated bed. And it is PLA not ABS.
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Floyd
Re: Top layer wont print
September 12, 2014 10:07AM
Sounds a bit on the hot end for PLA at 220. I print ABS at 230...
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P4d0uch
Re: Top layer wont print
September 14, 2014 03:04PM
This is my latest print. Still PLA. This was at 97 flow 205°C but the corners are not perfectly staright
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Attachments:
open | download - 20140914_213831~01~01.jpg (608.6 KB)
MrDoctorDIV
Re: Top layer wont print
September 14, 2014 03:36PM
In all my slicers I need to put the flowrate at 90% for PLA. It extrudes quite, quite different from ABS.
With the browning in the last one it also looks like your temp is also still too high.

Realizer- One who realizes dreams by making them a reality either by possibility or by completion. Also creating or renewing hopes of dreams.
"keep in mind, even the best printer can not print with the best filament if the user is the problem." -Ohmarinus
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P4d0uch
Re: Top layer wont print
September 14, 2014 03:56PM
Ok i will try 90 tomorow and i see if that helps.
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P4d0uch
Re: Top layer wont print
September 15, 2014 02:46AM
This one came out pretty good but infill was just 10% and no cooling so the top is with holes. Flow 90% 205°C PLA. Should i try even lower flow?
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Attachments:
open | download - 20140915_090102~01~01.jpg (518.4 KB)
open | download - 20140915_090038~01~01~01.jpg (520.9 KB)
Floyd
Re: Top layer wont print
September 15, 2014 08:30AM
Might try a little less.
Also how many perimiters are you doing on this part? It almost looks like you only do one perimiter. If so try bumping it you you get 2-3 loops to get a cleaner finish.
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P4d0uch
Re: Top layer wont print
September 15, 2014 09:15AM
And how can i force cura to do more perimeters?

Edited 1 time(s). Last edit at 09/15/2014 09:16AM by P4d0uch.
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gordonendersby
Re: Top layer wont print
September 15, 2014 10:28AM
Its the wall thickness vale.
Ive got a 0.3mm nozzle.
If i use a thickness of 0.33mm i get one pass of the head on the wall.
If i use 0.66mm i get a double pass of the head so double thickness.
These values wer by experimentation.
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P4d0uch
Re: Top layer wont print
September 15, 2014 10:44AM
I have 0.7 nozzle and the shell thickness is now 0.7. So 1.4 to get 2 perimeters?
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Floyd
Re: Top layer wont print
September 15, 2014 01:17PM
Correct. Check the part in Cura by viewing the layers. You should have two colored lines around the part showing 2 passes. You might have to go to 1.5mm to get it to show. I know on my .4mm tip I have mine set to .9 to get 2 perimeters.
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