Is Circle Calibration Possible?

[dvseliteus]

Hi All,
I have all my printer settings dialed in and the prints are coming out great. However, I cannot seem to get a perfect circle and they are coming out a bit skewed.
I have a 28.5mm circle and I get diameter measurements ranging from 28.29mm to 28.72mm when measuring with a caliper.
I know that Simplify3D has a Horizontal Size Compensation but that does not seem to fix the issue.
Any suggestions would really help.
Thank you

3D Printer: Reprap Prusa Laurel i3-A8 (Hesine)
Simplify3D 3.0.2

[zemlin]

If you print a square, do you get the same dimension corner to corner?
If not, that would indicate that your X and Y axes are not perpendicular.

[dvseliteus]

zemlin thanks for the great feedback!
I guess I can't expect military grade precision from a $200 printer.
I printed a 20mm x 20mm square and here's what I measure;

X-Axis = 19.85mm
Y-Axis = 20.09mm

About a 0.25mm difference

I wish there where a way to dial the X and Y Axis in under the Simplify3D Settings.
I'm not about to modify the firmware on my controller board as I don't have the knowledge or Code from the manufacturer (China).

Any thoughts on a dialing it in to perfection?

[dkightley]

Have a read of this thread: viewtopic.php?f=8&t=1937

[zemlin]

zemlin thanks for the great feedback!
I guess I can't expect military grade precision from a $200 printer.
I printed a 20mm x 20mm square and here's what I measure;

X-Axis = 19.85mm
Y-Axis = 20.09mm

About a 0.25mm difference

You can dial in different X Y and Z scaling factors on the parts before slicing, but I was suggesting that you measure CORNER TO CORNER on the square - the diagonals. Those should be the same regardless of scaling errors. If those are not the same you may need to tweak your X and Y rail positions until you get 90 degree corners. Then scaling factors should take care of any other errors.[/quote]