Replacement method of the top punch:
Put a piece of wood between the top punch and bottom die and jog the machine to make the punch close to the wood (prevent the punch from falling).
Loosen the tooling clamps (multiple) on the top of the punch and pull out the punches.
Install the new punch, gently tighten the clamps, jog to press the new punch on the wood, and then tighten the clamps (so that there is no gap between the punch and the clamps).
Replacement method of bottom die:
Just loosen the pressure block and then replace the die.