Originally Posted by
zephyr9900
Two things to verify before you get too far, since the TTS depends on the ring on the tool holder registering on the end of the spindle when the holder is clamped in the collet:
1. Make sure that the nose of the R8 collet doesn't touch the inside flat face of the TTS holder (the Tormach collet is specifically ground down just short of flush with the spindle face--it is flat on the end, and not domed like regular collets).
2. The spindle face itself needs to be square with the spindle axis--ideally ground under its own power, but you can verify the squareness with a test indicator.
Randy