Draper D20 60508 handleiding

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Handleiding

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9. OPERATION
9.6 SELECTING THE RIGHT SPEED –
FIG.8
The engraver/grinder has a speed range of
5,000-34,000 RPM. To select the right speed
for each job, use a practice piece of material.
Vary speed to nd the best speed for the
accessory you are using and the job to be
done.
Use the speed control dial (2) to set the best
speed for the job. When the dial is set to the
maximum setting, approximately 34,000 RPM
is achieved.
Refer to the Speed Dial Settings table (page
19) to determine the proper speed based on
the material being worked and the type of
accessory being used.
Slower speeds
Certain materials, some plastics for example,
require a relatively slow speed because the
friction of the tool generates heat and causes
the plastic to melt at high speed.
Slow speeds (15,000 RPM or less) are usually
best for polishing operations using the polishing
accessories. They may also be best for working
on delicate projects, delicate wood carving, and
fragile model parts.
Higher speeds are better for carving, cutting,
and shaping wood.
Hardwoods, metals, and glass require high
speed operation. Drilling should also be done at
high speeds.
To determine the optimum operational speed
for different materials and accessories, refer to
the Speed Dial Settings table (page 19). Look
this table over and become familiar with it.
The best way to determine the correct speed
for work on any material is to practice for a few
minutes on a piece of scrap, even after
referring to the table. You can quickly learn that
a slower or faster speed is more effective just
by observing what happens when you make a
pass or two at different speeds.
When working with a scrap piece of plastic,
start at a slow rate of speed and increase the
speed until you observe whether the plastic is
melting at the point of contact; reduce the
speed slightly to get optimum working speed
without melting the workpiece.
8 FIG.
(2)

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Productinformatie

MerkDraper
ModelD20 60508
CategorieNiet gecategoriseerd
TaalNederlands
Grootte2581 MB