Okay, finally got a cheap laser tach off ebay and it seems to do the trick. The max speed of the spindle with a tormach end mill holder and a 2 flute .5 endmill was 5600. So thats about a 1000 below theoretical. I intend to change out the spindle gears to the belt drive as described in arceurotrades pdf and will see if that will speed it up at all. It should give another ten percent, plus the pulleys are aluminum, so less rotating mass, and again possibly a bit more speed. Hopefully, much less noise! |