Ryobi HT230 - Manual (Page 14)

14
OPERATION
BALANCING ACCESSORIES
For precision work, it is important that all accessories be
properly balanced. To balance an accessory, slightly loosen
the collet nut and give the accessory or collet a 1/4 in. turn.
You should be able to tell by the sound and feel if the accessory
is running in balance. Continue adjusting in this fashion until
the best balance is achieved. Replace accessories if they
become damaged or unbalanced.
SELECTING THE RIGHT SPEED
See Figure 9.
The rotary tool has a speed range of 10,000 to 35,000 RPM.
To select the right speed for each job, use a practice piece of
material. Vary speed to find the best speed for the accessory
you are using and the job to be done.
The digital display shows the speed setting of the tool using
the numbers 10-35. Press the
+ speed control button to
increase the speed, and press the – speed control button
to decrease the speed. Speed settings are approximately
one thousandth of the RPM. For example, a speed setting
of 10 is approximately 10,000 RPM, and a speed setting of
35 is approximately 35,000 RPM.
Refer to the Speed Dial Settings table 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.
WARNING:
Wire brushes must never be operated at speeds higher
than 15,000 RPM. Wire brushes must run at least one
minute before use. During this period, no one should
stand in front of or in line with the rotating brush. Failure
to heed this warning could result in serious personal
injury.
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.
Fig. 9
Fig. 8
FIBERGLASS
CUT-OFF WHEEL
DIAMOND
CUT-OFF WHEEL
SANDING DRUMS
SPEED CONTROL
BUTTONS
DIGITAL
DISPLAY