Operating and Maintenance Manual
©
HOFFMANN MU3-P & MU3-PD
• Version 7.205.00 • 01-2018
14
10
Changing Router Bits - continued
8.
Slide the motor all the way into the motor
bracket
and tighten the Allen head screw (3 on
previous page) by hand.
9. Loosen the Lock-Screw or Locking Lever (4) on
top of the motor bracket and adjust the motor in or
out by moving the motor fine adjustment knob (5)
10. Use the square stop (6) to set the proper distance.
The stop has three steps in one side (W1, W2,
W3) and one large step machined in the opposite
for W4 router bits.
11. Slide the square stop out of the fence rail and
remove the locking lever, washer and square nut.
Place the stop upside down on the table and push
it tightly against the back fence. Turn the motor
fine adjustment knob (5) until the tip of the router
bit (7) touches the corresponding step.
Use the smallest step for W-1, the middle step for
W-2 and the deepest step for W-3.
12. Tighten the Lock-Screw or Locking Lever (4) on
top of the motor bracket and lower the carriage to
its home position.
13. Connect air and electrical power and make a test
cut and verify proper settings by inserting a
Hoffmann key
– adjust setting if necessary
14. Disconnect air and switch OFF router motor, then
raise the carriage and install a new chip breaker
insert. Place a piece of scrap wood over the insert,
switch ON motor and slowly lower the running
router bit down through the wood. The scrap wood
eliminates tear out on the surface of the chip
breaker.
15. Hold the scrap wood securely in place and be
aware of the turning bit at all times. Lower the
router carriage by turning the black star knob
slowly. When the motor has shut off, secure the
threaded stem with the locknut.
Important Tip!
Due to its weight, the rear of the motor will tilt downward
when the Lock-Screw or Locking-Lever (4) is loosened. Before using the motor fine adjustment knob (5), lightly
re-tighten the Lock-Screw or Locking-Lever just enough to bring the rear of the motor back up. If the motor is left
too loose while turning the adjustment knob, subsequent tightening of the Lock-Screw or Locking-Lever will
bring the motor back to its proper horizontal position and cause the router bit projection to be off.
Always wear safety glasses when operating this machine!
4
5
6
7
5
