Dymo 31-250 - Manual (Page 20)

20
MAINTENANCE
MAKE CERTAIN THE MACHINE IS DISCONNECTED FROM THE POWER SOURCE BEFORE
PERFORMING MAINTENANCE PROCEDURES.
1. Periodically clean or vacuum the feed belt.
2. Periodically clean the sawdust from sanding cylinder cavities.
BRUSH INSPECTION AND REPLACEMENT
CAUTION: BEFORE INSPECTING BRUSHES, DISCONNECT THE MACHINE FROM THE POWER SOURCE.
Fig. 42
B
Brush life varies, depending on the motor load. Check the brushes after the first 50 hours of use for a new machine or
periodically after a new set of brushes has been installed.
After the first check, examine the brushes every 10 hours (approximately) until replacement is necessary.
The brush holders (A) Fig. 42, are located on the DC motor housing opposite each other. Fig. 43, illustrates one of the brushes
removed for inspection. When the carbon on either brush (B) Fig. 43 is worn to 3/16” or less, or if the spring is burned or
damaged, replace both brushes. If the brushes are found serviceable after removal, reinstall them in the same position as
removed.
Fig. 43
3. Oil all bushings on the feed table rollers and front and rear pressure rollers.
4. Oil thrust bearings on feed table screws [See (T) Fig. 41.]
A
DRUM MOTOR OVERLOAD
PROTECTION
The drum motor is equipped with a re-setable overload
relay. If the motor fails to start because of overloading or
because of low voltage, turn both switches to “OFF”. Let
the motor cool for 3 to 5 minutes, then push the reset button
(A) Fig. 44. Start the machine.
Fig. 44
A
FEED BELT MOTOR OVERLOAD
PROTECTION
The feed belt motor is equipped with a re-setable overload
relay. If the feed belt is tensioned to tightly, the feed belt
overload may trip. To correct, loosen the tension on both
sides of the feed belt, 1/4 turn at a time on the tensioning
set screw on each side of the feed belt. Push the reset
button (B) Fig. 45.
Fig. 45
B