Maintaining Your Scroll Station; General; Carbon Brushes; Lubrication - Dremel 1800 Manual De Instrucciones

Maintaining Your Scroll Station

General

For your own safety, turn power switch to OFF
WARNING
!
and remove plug from the power source out-
let before maintaining or lubricating your Scroll Station.
Frequently blow out any dust that may accumulate inside the
motor.
An occasional coat of paste wax on the work table will allow
materials being cut to glide smoothly across the work surface
and deters rust.
Certain cleaning agents and solvents damage
CAUTION
!
plastic parts. Including: gasoline, carbon tetra-
chloride, chlorinated cleaning solvents, ammonia and house-
hold detergents that contain ammonia. Avoiding use of these
and other types of cleaning agents minimizes the probability
of damage.
To avoid shock or fire hazard, if the power
WARNING
!
cord is worn or cut, or damaged in any way,
have it replaced immediately.
All repairs, electrical or mechanical, should be
WARNING
!
attempted only by trained repairmen. Contact
the nearest Dremel Factory Service Center. Use only Dremel
replacement parts, any others may create a hazard.

Carbon Brushes

The brushes and commutator in your tool have been engi-
neered for many hours of dependable service. To maintain
peak efficiency of the motor, we recommend the brushes be
examined every two to six months. Only genuine Dremel
replacement brushes specially designed for your tool should
be used.
The brushes should be inspected frequently when tools are
used continuously. If your tool runs sporadically, loses power,
makes unusual noises or runs at a reduced speed, check the
brushes. To continue using the tool in this condition will per-
manently damage your tool.
With the cord unplugged, remove the brush caps one at a
time with a small screwdriver by rotating cap counter-clock-
wise and check each brush (Figure 20).
If the brush is less than 1/8" long and the end surface of the
brush that contacts the commutator is rough and/or pitted,
replace the brush. Check both brushes. Usually the brushes
will not wear out simultaneously. If one brush is worn out,
replace both brushes. Make sure the brushes are installed as
illustrated. The curved surface of the brush must match the
curvature of the commutator.
After replacing brushes the tool should be run at no-load;
place it on a clean surface and run it freely for 5 minutes
before loading (or using) the tool. This will allow the brushes
to "seat" properly and will give you more hours of life from
Figure 20. Checking Motor Carbon Brushes
Figure 21. Lubrication
each set of brushes. This will also extend the total life of your
tool since the commutator surface will wear longer.

Lubrication

ARM BEARINGS
Lubricate the arm bearings with oil after 10 hours of use. Re-
oil after every 50 hours of use or whenever there is a squeak
coming from the bearings.
TO LUBRICATE
1. Remove rubber plug to expose bronze bearing.
2. Squirt a generous amount of SAE 20 oil around the shaft
end and bronze bearing.
3. Replace rubber plug.
4. Let the oil soak in overnight in this condition.
19