This looks like a suck / prime issue.
You can use CubeItMod post processor to change the suck/prime values.
You can also change the flow separately for solid, perimeter and infill.
Hello Andrew,
I use the rep1 with gpx as well, with better results.
Do you use the M101/M103 commands on the printer tab? That could result in double prime and suck when set so in the Sailfish firmware.
Did you measure your filament ok.? Because normally I leave the flow tweak to 1. Only adjusting the filament diameter with 0.01mm steps (increasing is resulting in less extrusion)
What settings do you use for suck and prime and on what speed?
Bart
>
> Op 28 mei 2014 13:31 schreef "Andrew Moore" <deane....@gmail.com>:
>
>> Hi,
>>
>> I am having a problem with the flow of ABS at the start of each layer as shown in the attached picture.
>>
>> Jitter is set at 0degrees in the above prints to more clearly show the behaviour.
>>
>> Once the flow starts the print quality is very good and the measured extrusion width matches that set in KISSlicer.
>>
>> I have managed to "fix" the issue by either:
>> - modifying the flow settings, this results in measured extrusion width > set extrusion width, or
>> - priming a small amount at the start of the layer, this results in blobs and zits on the print
>>
>> I've systematically experimented with varying filaments, print temperatures, extrusion widths and flow rates but can't seem to get rid of this behaviour without adversley affecting measured extrusion width.
>>
>> Is tweaking flow rate, and living with the larger extrusion width, the correct way to handle this situation or is there something else I should be trying?
>>
>> Any assistance greatly appreciated.
>>
>> Thanks.
>>
>>
>>
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Do you use the M101/M103 commands on the printer tab? That could result in double prime and suck when set so in the Sailfish firmware.
Did you measure your filament ok.? Because normally I leave the flow tweak to 1. Only adjusting the filament diameter with 0.01mm steps (increasing is resulting in less extrusion)
What settings do you use for suck and prime and on what speed?
Did you try other extrusion speed or temperature ?