First I broke a bit after the z slammed into the board while measuring. Cleaned the Z encoder wheel and cleaned and reseated the ribbon cable. Then I got oval drill throughs instead of round holes - cleaned the chuck and used a new 1/8 cutting bit. Now it measures the board and after plunging to the board twice and then twice into the hole on the right of the board it hits the plate and gives a Z stall. I cleaned and lubed the Y and Z rails, tried a different bit, thicker board and no luck. When I increase the board thickness to 1" from just over .56 it measures the board and gives a thickness of 5" vice 1". I haven't tried building up the area where the bit hits on the left of the board (keypad side). Quite honestly I'm fed up with taking this machine apart considering it only has 65hrs on it. I suspect that the Z encode could still be a problem, but before I take her apart again (and possibly throw it in the dumpster) - any ideas?
Thanks
Bill
Bill