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First layer perimeter

Posted by Gersen

Gersen

First layer perimeter
August 05, 2014 05:35PM

Registered: 9 years ago
Posts: 8

I have this issue with the first layer: the extruder move to position, start moving along perimeter and the loop without extruding then start the some infill without extruding. Only after 2 or 3 infill segments the extrusion starts.
The gcode seems ok, so I don't find the issue. I get the same if I add a skirt.

G90
G21
G28
M103
M105
M106
M113 S1.0
M108 S8.96
M104 S185.0
G1 X90.45 Y90.225 Z0.325 F1200.0
G1 F798.0
G1 E1.7
G1 F1200.0
M101
G1 X109.775 Y90.225 Z0.325 F384.0 E2.9483
G1 X109.775 Y109.775 Z0.325 F384.0 E4.2111
G1 X90.225 Y109.775 Z0.325 F384.0 E5.474
G1 X90.225 Y90.45 Z0.325 F384.0 E6.7223
G1 F798.0
G1 E6.7223
G1 F384.0
M103
M108 S6.4
G1 X90.9 Y90.675 Z0.325 F1200.0
G1 F798.0
G1 E6.7223
G1 F1200.0
M101
G1 X109.325 Y90.675 Z0.325 F384.0 E7.5724
G1 X109.325 Y109.325 Z0.325 F384.0 E8.4329
G1 X90.675 Y109.325 Z0.325 F384.0 E9.2934
G1 X90.675 Y90.9 Z0.325 F384.0 E10.1435
G1 F798.0
G1 E8.9435
G1 F384.0
M103
G1 X91.058 Y108.24 Z0.325 F1200.0
G1 F798.0
G1 E10.6435
G1 F1200.0
M101
G1 X91.76 Y108.942 Z0.325 F384.0 E10.6893   
G1 X92.396 Y108.942 Z0.325 F384.0 E10.7187    
G1 X91.058 Y107.604 Z0.325 F384.0 E10.806    <--start extruding
......

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jbernardis

Re: First layer perimeter
August 06, 2014 03:37PM

Registered: 11 years ago
Posts: 1,320

Your E value is gradually climbing, so your G Code looks to be correct.

Are you priming the extruder before you start? I ALWAYS use the manual extrude to get extrusion to start before I hit the print button, and I waste as little time as possible between the two so there is no oozing.

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Gersen

Re: First layer perimeter
August 07, 2014 05:45AM

Registered: 9 years ago
Posts: 8

I find the problem, when I start the print with the extruder not yet with the right temperature I get lot of "preventing low temperature extrusion", so it start extruding after some number of command corresponding to the number of warnings. I solved waiting for the right temperature before printing.

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jbernardis

Re: First layer perimeter
August 07, 2014 01:53PM

Registered: 11 years ago
Posts: 1,320

You know you can set the temp with the M109 command instead of the M104. M109 will wait until the temp is reached