Odd blop appears when printing rectangular shapes

Hi,

I am experiencing a blop when printing (see picture of mysterious blop )

No, but really I believe that all the bright minds of this forum might be able to explain why my printer produces blops whenever it prints purely rectangular: It seems that whenever it has to print rectangular but with a hole it extrudes just the right amount of plastic? And without the hole it blops.

I use slic3r and have attached my configuration files.

Thanks.

I've noticed something similar but less pronounced. What infill factor and infill type are you using? Does is make any difference whether you select 'External perimeters first' or not?

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

Printing this part i used an infill density of 50% and rectilinear pattern.

I just noticed the setting: "solid infill treshold area" that forces solid infill for areas less than 70 mm^2. Could this be the case for printing the parts with holes, hence lesser treshold area. So somehow slic3r has more "correct" settings when forcing a solid infill.

I haven't tried "external perimiters first" this time arround - I'll try that first thing tomorrow.

Quote
dc42
...I've noticed something similar but less pronounced...

Printing artefacts: cause and remedy?
[forums.reprap.org]

Erik