Did you know that Mastercam’s Dynamic Motion Technology includes two different techniques: Dynamic High Speed Machining and Dynamic Power Cutting. Let’s take a closer look at them.

But first, What is Dynamic Motion?

Dynamic Motion is Mastercam’s unique toolpath that has a super smooth cutting motion, is 25 to 75% faster, and extends tool and machine life. And it offers two different techniques that let you apply it to different machine types, materials, work holding techniques and cutter types – Dynamic High Speed Machining and Dynamic Power Cutting.

We compared the Speed approach on the left and Power on the right. We’re cutting with an Iscar SolidFinish 4 flute 3/8d diameter end mill with a .02 corner radius on a HAAS VF2- at the Haas Factory Outlet in Pittsburgh, PA.

Mastercam’s Dynamic Power Cutting vs Dynamic Speed Cutting

The machining specs we as follows:

  • The RPMs – Speed cutting RPMs is 11,600 and Power is 5100
  • The Feed rates – Speed is 372 in/min and Power is 40 in/min
  • Chiploads – Speed is .008/tooth and Power is .0019/tooth
  • Width of cut – Speed at 10% cutter diameter and Power at 75%
  • Depth of cut – same 2 x diameter .75

It’s interesting to note that the Metal Removal rate was higher using Speed Cutting. This would lead you to believe that the cycle time for Speed Cutting would be faster, but in reality Power Cutting is the superior toolpath for this geometry.

Mastercam’s Dynamic Power Cutting vs Dynamic Speed Cutting

The tool’s entrance and exit to the part, especially using the Dynamic Speed Cutting, uses a sweeping arc in and out (and during the cut) as it maintains a consistent chip load. This super smooth cutting uses a sweeping arc on and off so the cutting pressure is gradual. This gives you extended tool and spindle life. It also leaves excellent sidewall surface finishes, considering this is a roughing operation. In many cases, you don’t need another end mill to finish with. You can use the same end mill to rough and finish, or maybe the roughing finish is good enough.

To compare a traditional toolpath using the same end mill with a 25% diameter step over, 1X diameter depth, and 30 in/min you would be just under 15 minute cycle. Speed Cutting is 1/3 the time and Power Cutting is 1/10 the time. Significant time savings are present either way making this the new definition of High Efficiency Milling.

To successfully utilize Dynamic toolpaths and get results like these, you need to understand the factors involved and how to select the right components. We have developed a specific hands-on course that covers these major factors and will prepare you to program and machine high efficiency parts.

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