Over extruding!

If I'm printing something small I get over-extrusion when doing infill. My E-steps are dead on.

I use repetier to generate g-code and print from an sd on my prusa i3.

In Slic3r i did notice one thing, not sure if it matters but maybe. Under the Print Setting tab and under the Advanced tab, First layer is at 200% in extrusion width. Should this be at 0 for default or is this normal? Also, in Overlap the Infill/Perimeters overlap is at 15%. Normal or not?

And help is appreciated.

Thanks, Adam.

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Dreadnaught426
My E-steps are dead on.

How did you determine that? The definition of well calibrated e-steps is that solid infill has no gaps and no bumps/ridges. Everything else just gets you in the ballpark. (ok, I admit that's an arguable point. If you're printing single walled vases then perhaps the width of the wall is the more appropriate measure of accurate extrusion)

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First layer is at 200% in extrusion width.

Slic3r uses % of layer height for widths, which I find unhelpful. I prefer to set a fixed width in mm and typically use a wider width for the first layer than for the remaining layers. Changing the width should have no impact on over/under extrusion as the volume is calculated accordingly.

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Also, in Overlap the Infill/Perimeters overlap is at 15%. Normal or nott?

Normal, but potentially the cause of over-extrusion on small models where fill is comprised of many short segments. You can try reducing this a little but watch out for the infill becoming less well attached to the perimeters.