I am using the Tormach Tension/Compression tapping head on a Series 3 PCNC and noticed when tapping my first holes in 1/4" thick steel with a 5/16-18 tap that when the spindle retracts , it is extending the tapping head further in tension that I expected (looks like maybe 3/8" of an inch. The RPM is 500 (and I calibrated the mill at 500) with a G84 tapping cycle (27.8 ipm calculated) and a P(dwell) of 0. Maybe I need to add a dwell? Can someone explain what the dwell actually does? for example, does it dwell after the spindle reverses (which would produce less tension extension on the tapping head I presume).