As shown in the attached file your most “aggressive” cut in that video was your “aggressive” contour cut. As shown below, that cut likely required less than 1.51 lbf and 40.2 Watts. Tripling the feed rate (and MRR) to maintain the 0.002 inch chip-load would require less than 4.53 lbf and 120.6 Watts. If that’s too much force for Shapeoko (is it?), you could reduce the force to less than 18/30 X 4.53 = 2.72 lbf by increasing the router speed to 30,000 RPM. You could then reduce it to 1.36 lbf by reducing the chip-load to the 0.001 inch you achieved in your adaptive cut. I’d be surprised if you couldn’t use the 0.00013 inch chip-load that you used with the Nomad cutting tool steel to reduce the force by another order of magnitude!
2019-09-09 Moy’s YouTube Aluminum and Steel Speeds and Feeds Workbook.zip (232.7 KB)
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