start/stop motion when cutting curves

[jonathanmahnken]

when cutting circles and arcs im getting a start stop motion, how can I fix this

[charliem]

when cutting circles and arcs im getting a start stop motion, how can I fix this

Open UCCNC and got to configuration/General settings and make sure Constant velocity mode is checked and also make sure the "Stop at Angles > " is set to 89.

[jonathanmahnken]

will the accuracy of my parts suffer by switching to constant velocity?

[charliem]

No. Not at all. This is how I have my software set and I don't have any issues.

[ger21]

Depending on how your circles are programmed, you may need to increase the error tolerance settings.
Increasing acceleration can also help.

[jonathanmahnken]

Thanks. In your opinion what are some safe starting points for acceleration considering that I'm using an older machine with stepper motors and ball screw drives

[jonathanmahnken]

Also my circles are programmed by vectric vcarve pro

[jonathanmahnken]

Ok so I switched to CV mode, and everything seems to be working fine, but my arcs look like a series of straight lines. How do I increase the resolution of my arcs. I am perfectly fine with it moving slower through the arc.

[ger21]

What are your CV settings set to?

[Battwell]

in vectric. select the vector curve and use convert to curves function.
set a tolerance of eg 0.2mm and preview it.
if happy save it.
recalculate the toolpath and save code.

this will make your code output much smoother!