01-05-2018, 12:28 PM
How is my new child, Grepper? So far, so good, however, I have spent more time disassembling and reassembling both the Viel and the Kally than actually sharpening with them. I have two tachometers and do plan some testing. Preliminary (unverified) tests indicate that my original PSI motor (which I adjusted for speed range) reads approximately a 600 RPM minimum speed. Since I have not verified this reading, I will use only rudimentary math. A four inch drive pulley is one third of a foot. That roughly cancels out multiplying the diameter by pi. Therefore, the surface feet per minute is around one times the rpm, or 600 sfm. That is around one third of the unmodified Kally's sfm, and even lower than the unmodified Viel with the six inch drive pulley.
On the high end, the PSI variable speed motor's top speed is about 2600 rpm, substantially higher than the unmodified Kally.
I have a piece of plate aluminum I cut off of an earlier Viel plate. I have been flattening and smoothing the bandsawn edge. When I had my Kally working with my 1/4hp fixed speed motor, I could only hold it against the grinding belt for a few seconds before it became too hot to hold. With the lowest speed, I can hold it perhaps twelve seconds. That is not Tormek, however, it is noticeably better.
Knowing what I now know, I will not try to adjust the factory settings on this second motor. The factory range is quite satisfactory.
Ken
On the high end, the PSI variable speed motor's top speed is about 2600 rpm, substantially higher than the unmodified Kally.
I have a piece of plate aluminum I cut off of an earlier Viel plate. I have been flattening and smoothing the bandsawn edge. When I had my Kally working with my 1/4hp fixed speed motor, I could only hold it against the grinding belt for a few seconds before it became too hot to hold. With the lowest speed, I can hold it perhaps twelve seconds. That is not Tormek, however, it is noticeably better.
Knowing what I now know, I will not try to adjust the factory settings on this second motor. The factory range is quite satisfactory.
Ken