Need help - turning

[ghd123]

my problem is mastercam x5 cannot turn curves, in chain it shows curves
but in motions it does only straight movements.

The only way to get curve is with multichain and with slot/cutoff tool.

Could you give advice or solution ?

[littlebrewman]

check your turning tool settings to make sure it is set to do plunge moves.

[Superman]

Are you chaining arcs or splines ?
Is the "Filter" checked ON ?

Has the "control" been told to use arcs ?


Splines
Mastercam creates point to point toolpaths then "Flters" it to fit arcs, it is best to replace a spline with arcs ( when possible ) ( use the "Simplfy" function in the edit pull-down).
Mastercam will call an arc a spline if any point on it's sweep is not on the turning plane.

[ghd123]

where excatly can I check these settings (filters etc) ? In system conf ?
I used arc in three points, probably they are splines to mastercam.

[chevcamo]

On your roughing and finishing tool paths, check your plunge parameters. In my attachment notice the four choices and the differences in each one as to what each actually cuts.