ROTHENBERGER ROTIGER VARIO Electronic - Manual (Page 17)

ENGLISH 16
VARIABLE SPEED
This saw is equipped with a variable speed control
thumbwheel (500 to 1400 SPM). As the
Thumbwheel is turned to the right, the speed of
the saw blade will increase. The motor is equipped
with electronic feedback circuitry to stabilize
cutting speed, so no matter the load, the motor
will maintain the set cutting speed.
Lower speeds are recommended for most metal
cutting and higher speeds are recommended for
wood. A few practice cuts at various speeds on
scrap materials will allow you find the ideal speed
for each application.
The motor has soft-start function so that it starts
up slowly and builds up to full speed after a few
seconds. This allows the operator to rest the blade
on the intended line of cut before starting. This will
avoid the wobbling blade from biting into the
material at the wrong place.
ORBITAL BLADE MOTION
This saw features orbital cutting motion.
The orbital motion allows the blade to do its work
most effectively. Since the blade teeth point
backward, the machine only cuts on the
backstroke. While the blade is making the forward
stroke it should only lightly slide across. The orbital
motion helps the blade to do this. Therefore,
excessive downforce will defeat this function.
Allow the tool to do the cutting. Excessive
downforce will not speed cutting, it will only cause
premature blade wear, lost teeth, narrowing kerf,
and blade overheating.
BEFORE YOU START TO WORK
Select the blade best suited for the material to be
cut. For greatest economy, use the shortest blade
suitable for the thickness of the material to be cut.
Be sure the material to be cut is rigid. Small work
pieces should be securely clamped in a bench vise
or with clamps to the work table. As the work
progresses in scroll or curved cut-out pieces, the
material may be readjusted to accommodate the
movement of the saw. The saw cuts freely with
only slight feed pressure. Forcing the saw will not
make it cut faster.
Quick-Release Chain Vise
The chain pipe vise is used as follows:
With the vise removed from the machine, wrap the
chain around the workpiece and engage in the
closest fitting link of the chain in the notch in the
vise body.
Turn the ratchet lever tensioning screw until fully
tight. Press the central button with the thumb to
ratchet the lever. If there is not enough range of
movement to fully tighten with the screw fully
home, then fully slacken the tensioning screw and
engage a closer fitting chain link into the notch
and retighten.
Once the vise is in place, engage the pivot axle of
the vise into the hole in the gearcase.
OPERATION
Since the blade (especially long blades) will wobble
side-to-side while running free from the workpiece,
this makes it very difficult to accurately control the
blade's entry point. Therefore, the technique is to
lightly contact the workpiece with the blade before
starting the machine. The motor's soft start
function will make this more controllable. Do not
use full feed pressure until the cut is fully
established.