Surface Finish Contour hesitating

[jeffl]

We have an OKUMA MCV-4020 that is 2 years old and we are hard milling some cavity blocks with it. It seems like every time we do a surface finish contour on a cone shape we get divots were the tool hesitates. We've tried different settings like follow surface, ramp, and high speed, but nothing really helps... it just moves the divots into different locations. I noticed that our Okuma has a HI-CUT option that is always and on I'm wondering if it is causing the tool to hesitate. It seemed like others that had this problem found it to be harmonics or vibration, but I can visually see the cutter hesitate.

[Hardmill]

If its hesitating I doubt its harmonics, im doing

a little research. Gimme a few

 

 

PEACE

[Matt Berube at Ferron Mold]

Try the "spiral limit" option.'

 

Set it to what you were using for step down.

 

Favorite new discovery for me.

 

The z moves down continuously instead of steps.

[jeffl]

quote:

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Try the "spiral limit" option.'

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Where is this setting at?

[MATT Q]

next to the cut depth tab it seems to add some time to the cycle though.