Gary Katz's (of ThisisCarpentry) two-step way of locking down the hold-down clamp never fails:
1) Push down the plunger hard on the workpiece while lifting up the clamp body at the same time with one hand (left)
2) Keeping the plunger and body in tension, lock the lever with the other hand.
I also used his four-cut calibration method to tune up my Kapex when it first came to my shop.
1) Push down the plunger hard on the workpiece while lifting up the clamp body at the same time with one hand (left)
2) Keeping the plunger and body in tension, lock the lever with the other hand.
I also used his four-cut calibration method to tune up my Kapex when it first came to my shop.