Hi, yes the jitter is to spread the startpoints on each layer. Jitter of 0 results in a vertical seam. I never had really blobs as you describe, but you can sea the seam when looking through a magnifying glass. (maybe I have bad eyes ;-)
things I can think of:
- how many loops are set? On the style tab: have you set Loops from inside to Perimeter? When not: maybe a to large amount of prime can cause it (same with only one loop set).
- have you set the same retraction and prime (on the material tab) as in Simplify3D (and turned it on(wipe and De-string) on the Style tab).? Maybe to much prime is causing it?
- finally: there is a setting on the Style tab called "seam hiding" I have never used it, but IMO is that probably what you need (when set the above ok). When set to 1 the perimeter path is going a little (I think 1 extrusion width) to the inside of the model at the end of the path.
Maybe others have more ideas.
Bart
post of the old forum:
I real discussion as well regarding this as well:
the default up until now was to have the perimeter start and stop inside the print. But the extra extrusion it was making on this little overlap (looks like an arrow in the gcode preview) was leaving a bump for some people so Lonesock made it adjustable. To my knowledge the amount it overlapped is calculated based on the extrusion width internally and the slider determines the amount of this internally calculated amount is used. 1.0 being 100% of the originally calculated amount, 0.5 being 50% etc. 0.0 is equal to the way Skeinforge, Cura, Slic3r, Repsnapper, RepRap Java host etc all have the perimeter end just butt up to the perimeter start.
FWIW, at first I didn't like this feature (just in principle) but after tweaking my calibration and deciding to increase temp to compensate for a little increase speed I noticed the seams were no longer as nice as I'd like them to be so I gave this feature a go today @ 0.5.
It made a real positive impact. Especially on layers with sparse infill. On layers with solid infill depending on the angle of the outer perimeter it sometimes contributed to the bump a little but overall I think ints a good feature to use on some prints along with wipe.