Thanks support.

I calibrated my printer when it first arrived.
X and Y steps were perfect, within .02 every time.
Z was .1mm out, id hit 10mm travel and it would only travel 9.9mm.

The trouble ive had with my first layer has been more my fault, not having my z height entirely correct.
As the days go by im dialling it in more and more, Have to say the prints are much better than expected.

Great to hear it.

I calibrated my printer when it first arrived.
X and Y steps were perfect, within .02 every time.
Z was .1mm out, id hit 10mm travel and it would only travel 9.9mm.

The trouble ive had with my first layer has been more my fault, not having my z height entirely correct.
As the days go by im dialling it in more and more, Have to say the prints are much better than expected.

You can do this with Skeinforge, but I don't remember exactly how.  With Slic3r though, try to get the bed to home right on the nozzle.  This should make the first layer .3, which is the same height as everything else without being squished.  Then set the first layer extrusion width to 200% and maybe a slower speed to get it to stick.  This way Slic3r knows how wide the first layer paths will be and can lay them out properly, in theory keeping the first layer dimensions correct.

If you get a wider extrusion by squishing the first layer with the offset screw, Slic3r can't compensate for it.

Actually, you would need to home slightly above the bed.  Unless you remove backlash in Z as discussed at the Google group ( https://groups.google.com/forum/#!topic … 8o1o5FG4Y) the first layer will be about .15mm shorter (and more squished) than it is supposed to be.

We've taken a look in to creating an official backlash mod. Hopefully we will see it in near future Solidoodle iterations.

If you get a wider extrusion by squishing the first layer with the offset screw, Slic3r can't compensate for it.

Actually, you would need to home slightly above the bed.  Unless you remove backlash in Z as discussed at the Google group ( https://groups.google.com/forum/#!topic … 8o1o5FG4Y) the first layer will be about .15mm shorter (and more squished) than it is supposed to be.

That being said, that little brim is hella useful for preventing the edges from peeling up. I'd leave it unless you absolutely have to remove it. Even then, I've gone into the design software and compensated around it before I turned it off.

1 question.
My first layer has a lip on it that protrudess further than the the actual outside of the shape.
If i print a 25mm test box, the first layer will be 25.6mm across, where above that, the walls measure 25mm perfectly

How can I rectify this?
I tried easing off the z stop but it causes the first layers to curl up.

Im using 3mm glass with hairspray, 195 extruder and 90 bed.
ive levelled everything, set z height with paper and so it would stick, ive calibrated the extruder and set the right steps and reloaded the firmware.

Any help would be great, cheers