01-05-2018, 08:05 PM
Grepper,
Your questions are well chosen. I consider my last post as initial observation, with any remote resemblence to good science being purely coincidental.
When I get caught up with some other projects, I will do better. I will take minimum and maximum RPM readings with both of my tachometers and use proper math to compute the SFP.
I keep a digital timer in my sharpening area. I will make up three identically sized pieces of flat steel. I will hold each in my fingers and grind for an identical length of time. One piece will be at minimum, one at maximum, and the third at middle speed. I will take before and after dial caliper readings to show the amount of steel removed. My gut feeling is that with the cooling time included, the slower RPM will actually remove more that 1/4 of the metal that the faster speed removes. I will let the tests tell the tale. I have always been more concerned with temperature than time.
I agree with your thoughts about aluminum. It was a poor choice for my ad hoc grinding. It just happened to be sitting on the bench next to the Kally.
Ken
Your questions are well chosen. I consider my last post as initial observation, with any remote resemblence to good science being purely coincidental.
When I get caught up with some other projects, I will do better. I will take minimum and maximum RPM readings with both of my tachometers and use proper math to compute the SFP.
I keep a digital timer in my sharpening area. I will make up three identically sized pieces of flat steel. I will hold each in my fingers and grind for an identical length of time. One piece will be at minimum, one at maximum, and the third at middle speed. I will take before and after dial caliper readings to show the amount of steel removed. My gut feeling is that with the cooling time included, the slower RPM will actually remove more that 1/4 of the metal that the faster speed removes. I will let the tests tell the tale. I have always been more concerned with temperature than time.
I agree with your thoughts about aluminum. It was a poor choice for my ad hoc grinding. It just happened to be sitting on the bench next to the Kally.
Ken