Mastercam arc output cuts jagged arc on lathe - Okuma OSP 5020L

[wdg5555]

I'm trying to cut a part that has a simple arc on a Okuma 5020L lathe. The problem is it is outputting the arc into two lines and after cutting the arc on the part it looks VERY jagged.

 

Below is the code.

 

Z-1.8255

X.2344

G18 G2 X.2933 Z-1.839 L.0391

X.3125 Z-1.8642 L.039

G1 X.3151 Z-1.8788

 

I have set the control definition and the post to not break arcs. 

 

If I move the arc up .0001" then the code posts out correctly as shown below.

 

Z-1.8255

X.2353

G18 G2 X.3127 Z-1.8642 L.0391

G1 X.3153 Z-1.8788

 

I have this problem every once in a while and would like to find a solution to it.

 

Thanks for any help!

[Mick]

Switch to I and K outout, and see if you get the same result.

 

I encountered a blend issue on two arcs on a U100L control, and switching to I and K eliminated the issue.

[wdg5555]

Switch to I and K outout, and see if you get the same result.

 

I encountered a blend issue on two arcs on a U100L control, and switching to I and K eliminated the issue.

I tried changing it to I and K but it still outputs two arc moves and causes problems at the machine. I'm guessing that If I had a newer lathe this code would work but I'm not sure.

[crazy^millman]

You would need to provide a sample file and I would send it to QC and let them dig into it. Hard to solve random issue without more stuff to work with.