The locking knob is fully open, and I already lubricated the shafts with some light machine oil. When I push down hard the action is smooth, but when I push down softly , say to zero out a fluted slot cutter, it seems to "grab". I then have to push down with more force, driving the end of the cutter into the workpiece. It's a brand new machine, not reconditioned, so it may require some break in. The springs are really noisy going up and down, they creak like an old car I used to own.
Outside of this one issue, I really like the machine, but for the price I expected that it would plunge more smoothly than my $200.00 Dewalt 611.
One more question, Do any of you use the "table extender" to cut rabbets/dadoes off the rail with the guide stops. The little plastic foot leaves much to be desired, especially as far as dust collection is concerned. Again, thanks for your help. -Z