Carbide Motion Arc EndPoint Error

[SLabuta (Steve Labuta - S3-XL)]

I’m seeing an odd error when trying to load a gcode file generated in devCad. I haven’t had any issues up to now, but with one specific gcode file I get an “Arc EndPoint Error” when trying to load the file. NCViewer and gSender do not have any issues with the file when running simulations on it. Is this a bug in CarbideMotion?

Balsa_30x4_1-4_3.nc (96.9 KB)

[WillAdams (William Adams (Carbide 3D))]

The line in question (and the preceding line) are:

G0X342.339Y7.371Z2.286
G3X345.237Y6.905I10.135J61.355F1651.0

Which if we draw it up is:

So a circle drawn from the upper right corner should pass through the center of both circles:

which when one zooms in:

does not, so the CAM tool in question misses by more then 0.05mm:

[SLabuta (Steve Labuta - S3-XL)]

OK, thanks for the detailed explanation Will. I’ll contact the developer of devCad on this.

Steve