OPERATION
FEEDING TOO FAST
See Figure 18.
Clean, smooth routing and edge shaping can be done only when the bit is revolving at a relatively high speed and is taking very small bites to produce tiny, cleanly severed chips. If you force the router to move forward too fast, the RPM of the bit becomes slower than normal in relation to its forward movement. As a result, the bit must take bigger bites as it revolves. Bigger bites mean bigger chips and a rougher finish. Also, because bigger bites require more power, the router motor may become overloaded.
Under extreme
The router is an extremely
FEEDING TOO SLOWLY
See Figure 19.
It is possible to spoil a cut by moving the router forward too slowly. When you advance the router into the work too slowly, the revolving bit does not dig into new wood fast enough to take a bite; instead, it merely scrapes away
When the bit is scraping instead of cutting, controlling the router is more difficult. With practically no load on the mo- tor, the bit revolves at close to top RPM, and has a much greater than normal tendency to bounce off the sides of the cut (especially if the wood has a pronounced grain with hard and soft areas). As a result, the cut produced may have rippled, instead of straight, sides.
Feeding too slowly can also cause the router to take off in a wrong direction from the intended line of cut. Always grasp and hold the router firmly with both hands when routing.
You can detect when you are feeding the router too slowly by the runaway,
TOO FAST
Fig. 18
TOO SLOW
Fig. 19
19