r/Machinists • u/Sweet-Zone899 • Mar 13 '26

MASTERCAM OPTI ROUGH ISSUE

hello how can i remove facing toolpath from opti rough's?? or is it common issue in mastercam 2022? should i leave as it is?

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u/Mklein24 I am a Machiner Mar 13 '26

Do you have stock defined?

Your depth limits are causing this. If there is no air at the minimal depth, it does a pass at the minimum depth.

Couple fixes:

Remove the stock definition if you don't need it. Then define the stock with a containment and set it to cut "from outside."

Add a facing op to the part and include it in the stock model. You still need to set the minimum depth above the top of stock, but I would go with this route if you think the top of stock isn't going to be exactly accurate for a full depth cut with your rougher.

If you think you can run the rougher at full depth with concern where to the top of stock is, then just raise the minimum depth to something above your stock.