Operating and Maintenance Manual
©
HOFFMANN MU3-P & MU3-PD
• Version 7.205.00 • 01-2018
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Step-by-Step Instructions for 45 degree miter joints
1. Select proper Dovetail Keys for the material being joined by always
using the longest Keys possible.
For example
, for 1/2” thick material use 3/8” long Keys, for 3/4” thick
material use 5/8” long Keys, for 1” thick material use 7/8” long Keys,
etc.
If correct Key size is not available, it is better to stack multiple Keys
than to use a single, short Key.
2. Set the routing height by adjusting the height adjustment bar to the
desired setting.
TIP: Hold a Dovetail Key against the bar for quick setting.
3. Select the key locations along the mitered end, depending on the
material being joining.
For profiled moulding, try to place Keys in thicker portions for best
results.
Generally, moulding over 1 1/4” (32mm) wide should be joined
with two Dovetail Keys for added strength.
4. Place workpiece on table and adjust Center Fence Plate by moving
it in or out until desired keyway location is set. Use the Center Line
Locator and/or digital display is so equipped.
5. Lock the Center Fence Plate in place with the locking lever and
lower the material hold-
down clamp to within 1/16” – 1/8” above the
material.
6. Place workpiece tightly against fence plate while pushing mitered
end against back fence.
6. Step on the pneumatic foot switch to activate the routing sequence.
The hold-down clamp will secure the material on the table, the router
motor will switch on and raise up until the pre-set height is reached,
then return down below the table.
7. The motor will switch off and the hold down clamp will release the
material.
