Festool Plunge Router I Manuel d'utilisateur télécharger pdf (Page 16)

Pre-cutting Dovetails and Keyways

Dovetail and keyway cutters are inherently weak

because the upper shank of the bit is smaller than

the cutting edges. If the stress on the bit is too

great, the cutting tip can break. To reduce the

stress on the cutter, it is common practice to

plough out the majority of the material with a

straight bit. The depth of the straight bit should be

slightly shallower than the depth of the final bit so

the bottom of the profile remains square.

Tips for Successful Routing

Chipping and Tearout

One of the most common problems woodworkers will encounter

when using a router is chipping and tearout of the workpiece.

The following tips can reduce the occurrence of chipping and

tearout.

► Take shallower passes to reach your final depth. With a shallow

pass, the router bit teeth will be cutting parallel with the grain

instead of arching through the grain.

► Examine the woodgrain before routing. If possible, orient the

workpiece so the grain doesn't fracture. To identify the grain

orientation, examine the edge grain, not the surface grain. Use

the following tips:

► If the grain orientation is not in the right direction, turn the

board over. (Rotating the board to the opposite edge does not

change the orientation. You must flip the board over.)

► For tight-grained woods where the grain orientation is not

obvious, look for pre-existing signs, such as small splinters at

the corners. You can also use a knife to cleave the grain.

► For open pore woods such as oak, examine the

capillaries on the edge of the wood. Orient the

board so the router is moving away from the

capillary entrance holes.

Chatter

Router bit chatter is the presence of small curves, or

scallops, in the routed profile (refer to the image on page

17). The following items may cause chatter:

► Too fast of a feed rate for the router RPM.

► Trying to take too much material in a single pass.

► Chatter is more noticeable with smaller diameter router bits.

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Festool Plunge Router I Manuel d'utilisateur Page 16