ROTHENBERGER Universal ROTIGER VARIO Electronic User 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.
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.
SAWING WOOD
Remember that because the blade cuts on the
up-stroke (pull) instead of the down-stroke (push)
as in the case of the hand saw, the good or finish
side of the work should face down (away from the
machine) during cutting.
PLUNGE CUTS
Caution: Do not plunge cut metal materials.
This machine can be used for plunge cutting
wood, plywood, drywall and plastic materials.
Clearly mark line of cut on the work.
Hold the front housing with one hand and the rear
handle with the other.
To start the cut, rest the saw on the cutting shoe,
align the blade with the intended line of cut with
the blade NOT touching the workpiece. Start the
saw. Using the shoe as a pivot point, carefully
pivot the saw forward by raising rear handle until
contact with the workpiece is made. Cut slowly
until the blade has cut through the work and
continue raising the rear handle until the saw is
fully perpendicular to the workpiece. Then
continue the cut normally.