Grizzly G1183/G1276 Manuel d'utilisateur télécharger pdf (Page 17)

G1183/1276 Combination Sander -15-

Belt Installation

Belt Tracking

The 6'' x 48'' sanding belt is easily installed. First

remove the belt guard by loosening the four com-

bination-head screws. Pull down on the spring

loaded belt tensioning lever which lowers the

upper roller and allows the belt to be slid off of the

two rollers. See Figure 14.

2. You should see a gap between the straight

edge and roller. Measure this with a feeler

gauge.

3. Repeat step 1 and 2 with the straight edge

positioned at the opposite edge of the plat-

en.

4. The difference in the measurements is the

amount of "twist" in the belt. Reduce the

twist by adjusting one of the two tracking

knobs. See Figure 16. If the "out-board"

end (or the end furthest from the tracking

adjustment side) of the roller measures

greater than the "in-board" side, tighten the

right hand tracking knob.

Tracking adjustment is conducted as follows:

1. Insure that the upper roller is parallel to the

platen (there is no adjustment for the lower

roller). This adjustment is easier to accom-

plish with the belt removed. Remember that

the roller is crowned, and a rough align-

ment of the roller to the platen was already

described in the section entitled Belt

Platen. To determine parallelism for proper

tracking, measure at a point approximately

.5'' from the ends of the roller. Use a

straight edge on top of the platen and

extend it over the roller. See Figure 15.

Figure 14. Installing sanding belt.

The new belt will have a rotation arrow on the

backing. Make certain the belt is placed onto the

rollers in the proper orientation. There is a rota-

tion label on the housing indicating the direction.

Pull the lever down and slide the new belt onto

the rollers and center it.

Figure 15. Measuring platen to roller parallelism.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 33 34

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Grizzly G1183/G1276 Manuel d'utilisateur Page 17

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