Delta 31-280 Overload Protection, Adjusting Tension and Tracking of the Sanding Belt

Page 9

OVERLOAD PROTECTION

The motor supplied with your sander is equipped with a reset overload relay button (A) Fig. 16. If the motor shuts off or fails to start because of overloading (sanding too heavy, using a worn sanding belt or disc, using the sander beyond its capacity), or low voltage, turn the switch (A) Fig. 14 to the “OFF” position. Let the motor cool three to five minutes and push the reset button (A) Fig. 16. The motor will then start.

ADJUSTING TENSION AND TRACKING OF THE SANDING BELT

A

Fig. 16

E

B

A

Fig. 17

C

E

Fig. 18

Fig. 19

IMPORTANT: THE TOOL IS SHIPPED WITHOUT BELT TENSION. BEFORE OPERATING THE TOOL, ADJUST THE BELT FOR CORRECT TENSION AND PROPER TRACKING BY DOING THE FOLLOWING:

1.DISCONNECT TOOL FROM POWER SOURCE.

2.Loosen the two lock knobs (A) Fig. 17, and remove the top cover (B).

3.Turn the belt tension lever (C) Fig. 18 clockwise to increase the belt tension. NOTE: The tension lever (C) is spring-loaded and can be repositioned by pulling out the handle, moving it, and letting it spring back into position. Correct tension is deter- mined by:

(1)flatness of the belt on the plate.

(2)slippage of the belt when sanding heavy work.

4.Rotate the belt (D) Fig. 19 by hand, and tighten or loosen the tracking knob (E) Figs. 18 and 19 until the belt is tracking correctly.

5.Turn the tool on and off to check for proper tracking. If the belt is leading to one side or the other, very gently turn the track- ing knob (E) Fig. 18 clockwise to move the belt to the right or counterclockwise to move the belt to the left.

6.A final adjustment can be made with the motor running. THIS ADJUSTMENT SHOULD BE VERY SLIGHT.

7.Replace top cover that was removed in STEP 1.

NOTE: After a long period of time, adjustments may be necessary to maintain the tension and tracking of the sanding belt. If the belt will not hold its tension, tighten the set screw (G) Fig. 20. If the belt will not hold its tracking, tighten the set screw (F) Fig. 20. NOTE: Make only small adjustments to these screws. Over-tightening will lock the tension lever and/or the tracking knob.

F G

Fig. 20

9

Image 9
Contents Sanding Center Belt/12 Disc Sander Model Refer to them often and use them to instruct others Additional Safety Rules for Sanding Center Power ConnectionsMotor Specifications All grounded, cord-connected tools Grounding InstructionsChanging Voltage Extension CordsOperating Instructions Attaching Tool To Stand Attaching Sanding DiscAttaching Disc Table Attaching Dust Chute Locking Switch in the OFF PositionMoving Sanding ARM to the Vertical Position Starting and Stopping the ToolOverload Protection Adjusting Tension and Tracking of the Sanding BeltTilting the Belt Sander Table Adjusting Sanding Belt Degrees to BeltChanging Position of Sanding ARM Adjusting Sanding Disc Degrees to DiscTilting the Disc Sander Table Adjusting Sanding Disc Guard Accessory HolderCircle Sanding Attachment Power TAKE-OFF Shaft Replacing Sanding BeltReplacing Sanding Disc Accessories PARTS, Service or Warranty Assistance Canadian PORTER-CABLE Delta Service Centers