Porter-Cable 643 Cordless Saw User Manual


 
8
VARIABLE SPEED
This saw is equipped with a variable speed control switch. The speed range is
0 to 2200 SPM. The speed is adjusted by squeezing the switch trigger. The more
the switch trigger is squeezed the higher the speed.
Use higher speed for fast cutting when finish and accuracy are not critical.
Use slower speed when accuracy and finish are critical or for delicate
materials.
BLADE ORBIT
The blade orbit may be varied by turning knob (A), Fig. 6, to any of four
positions indicated by the numbers “0” through “3”, with “0” producing no
orbit and “3” producing maximum orbit. The orbit may be adjusted with or
without the motor running. Move knob (A), Fig. 6, to the detent in the housing
corresponding to the number on the housing. The knob is shown in the
vertical position “3”. The horizontal position would be setting “0”. Metal
cutting should be performed in orbit setting “0”.
Use of higher orbit settings when performing intricate scroll cuts may cause
blade breakage. The lower orbit settings are recommended for scrolling. Orbit
position “0” will produce the most accurate cuts with less splintering and the
longest blade life.
CHIP BLOWER
This saw is equipped with a chip blower to keep the cutting area free of chips.
Use knob (B), Fig. 6, to turn the chip blower on and off. The knob is shown in
the “ON” position, to turn the chip blower “OFF” turn the knob clockwise until
it stops.
PLUNGE CUTTING
WARNING: When cutting into a
wall avoid contact with all
exposed metal on the tool to
prevent electrical shock hazard
resulting from accidentally cutting
into a live wire. HOLD SAW AS
ILLUSTRATED IN FIG. 7.
Fig. 6
A
B
Fig. 7
908937 - 12-20-02.qxd 12/20/02 10:02 AM Page 8