CAM bugs
Posted by
Elliot Burke
on 2002-07-27 00:40:43 UTC
After designing a simple part, BobCAD 17 generated the following G code:
G01 X-0.143 Y-0.895 Z-0.0932
X+0.9 Y-0.895 Z-0.0938
G03 X+1.589 Y-0.572 I0.0 J+0.895
This should have made a line and an arc.
TurboCNC was used to control a Taig mill.
What it did was cut first a complete circle, then the fractional part of the
circle that was the arc.
Imagine my surprise!
Changing x center of the circle from I0.0 to I-.001 fixed the problem.
Is it likely that this is a round off error?
Will I have to go through all the g-code to locate problems like this?
Darn, I had thought this was going to be easy.
Elliot
G01 X-0.143 Y-0.895 Z-0.0932
X+0.9 Y-0.895 Z-0.0938
G03 X+1.589 Y-0.572 I0.0 J+0.895
This should have made a line and an arc.
TurboCNC was used to control a Taig mill.
What it did was cut first a complete circle, then the fractional part of the
circle that was the arc.
Imagine my surprise!
Changing x center of the circle from I0.0 to I-.001 fixed the problem.
Is it likely that this is a round off error?
Will I have to go through all the g-code to locate problems like this?
Darn, I had thought this was going to be easy.
Elliot