Powersurface tip. I have an area across some cross holes I need to machine. I didn't want the break dance process where I grabbed the surfaces around the hole and then had it jumping across to the next surface. I spent time trying to get Model Prep to remove the holes and the shape was just to complex. Spaceclaim couldn't handle it either. I made up a bunch of surfaces, but problem is they are surfaces and the toolpath is not nice and clean. I am getting little studders in the motion. Running a 5 Axis tool that is 18" gauge length with studders is not a good thing. I wanted a good surface and fought to better part of the day getting something. I finally got a good chain network to make a Powersurface, but the problem was it was not smooth towards the end of the shape and it was wrapping to close to the edge. I extended the cross chains .25 past the tear drop shape and then redid the Powersurface and now it fits into the area perfectly. Powersurface is a awesome tool and when we give it a little help it will do exactly what we need.

The error described in this thread was addressed in Mastercam 2021.

Small Drills with Tapers between shank and drill are not definable in Mastercam. Why this simple thing is so hard escapes me, but there is a way around it to get 100% accurate definition for CAV and even very when even .001" (0.0254mm) difference can scrap a part. Define the drill as the smallest diameter you are drilling. Then in the holder add the taper and shank of the drill in there and now you have correctly defined the drill, taper and shank. Here is a 1.5mm (.059") pilot drill and the next tool used will be a 1.5mm (.059") diameter 20X drill. Both were defined the same exact way with the 3mm shank down to the 1.5mm (.059") diameter with a 2mm taper length.

Lots of great tips shown here by Ron! I look forward to the rest of the videos. https://blog.caminstructor.com/expert-level-mastercam-optirough-tips

My reseller cant get it. He said it is a Cimco product