BM 2610021461 06-12_BM 2610021461 06-12.qxp 6/26/12 1:38 PM Page 13

ROCKER “ON/OFF” SWITCH

Your tool can be turned “ON” or “OFF” by the rocker switch located on the motor housing. One side of the switch is marked “I” for “ON“, and the other side of switch is marked “O” for “OFF“.

TO TURN THE TOOL “ON”: Push the side of the switch marked “I”.

TO TURN THE TOOL “OFF”: Push the side of the switch marked “O”.

SOFT START FEATURE

Electronic feedback control minimizes torque twist customary in routers by limiting the speed at which motor starts.

ELECTRONIC VARIABLE SPEED

CONTROL

(Model PR20EVS Only)

The electronic speed control feature allows motor speed to be matched to cutter size and material hardness for improved finish, extended bit life, and higher performance. Speed changes are achieved by rotating the Control Dial RIGHT to increase speed or LEFT to decrease as indicated on housing (Fig. 1). Speed may be changed while tool is on. The reference numbers on the dial facilitate re- setting control to desired speed.

The speed chart indicates the relationship between settings and application, exact settings are determined by operator experience and preference. The bit manufacturer may also have a speed recommendation.

DIAL

SETTING RPM APPLICATION

1

16000

 

Larger-diameter bits

2

18000

 

} and cutters.

3

20000

4

22500

}

Softwoods, plastics,

5

26500

laminates, smaller

diameter bits and

6

35000

cutters

 

 

 

CONSTANT RESPONSE™ CIRCUITRY

The router's Constant Response™ Circuitry monitors and adjusts power to maintain the desired RPM for consistent performance and control.

FEEDING THE ROUTER

In addition to the main palm-grip area at the back of the motor housing and base, the base has Bosch-exclusive finger support pockets to provide additional stability for the router. The pockets feature finger guards to provide a barrier between the finger pockets and the bit area (Fig 13).

When using finger pockets, ! WARNING always place both finger

pockets over the workpiece and always hold the router in a way that allows you to see your finger and thumb.

FIG. 13

WORKPIECE

EDGE

WORKPIECE

As seen from the top of the router, the bit turns clockwise and the bit’s cutting edges are positioned to best cut into the workpiece. Therefore, the most efficient cut is made by feeding the router so that the bit turns into the workpiece, not away. Figure 14 shows proper feed for various cuts. How fast you feed depends on the hardness of the material and the size of the cut. For some materials, it is best to make several cuts of increasing depth.

If the router is hard to control, heats up, runs very slowly or leaves an imperfect cut, consider these causes:

1.Wrong direction of feed — hard to control.

2.Feeding too fast — overloads motor.

3.Dull bit — overloads motor.

4.Cut is too large for one pass — overloads motor.

5.Feeding too slow — leaves friction burns on work.

Feed smoothly and steadily (do not force). You will soon learn how the router sounds and feels when it is working best.

Always hold the router off the work when turning the switch on or off. Contact the work with the router after the router has reached full speed, and remove it from the work before turning the switch off. Operating in this manner will prolong switch and motor life and will greatly increase the quality of your work.

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Image 13
Bosch Power Tools PR20EVSNK Rocker ON/OFF Switch, Soft Start Feature, Electronic Variable Speed Control, Workpiece Edge