Grizzly G9983 Manuel d'utilisateur télécharger pdf (Page 29)

G9983 15" Open-End Wide-Belt Sander -27-

Oscillation Return

Figure 22. This is the oscillation return valve

and the air eye fork.

The oscillation return keeps the sanding belt in

motion. The valve shown in Figure 22 controls

the oscillation return.

To adjust the oscillation return:

1. Turn off all power to the sander, but keep air

pressure going into the machine. Lower the

belt and slide it out of the way of the eye fork.

2. Block the airflow between the eye fork until

the top roller rotates to one side and does not

return.

3. With the airflow still blocked, loosen the jam-

nut on the valve knob and tighten the knob to

close the valve.

4. Now clear the eye fork so the air will flow

between it again. Watch the top roller and

slowly open the valve.

5. When the top roller begins to move, open the

valve another

⁄4 to

⁄2 turn of the knob.

Tighten the jamnut. DO NOT open the valve

more than needed or there will be excessive

pressure on the air system.

Limit Switches

Figure 23. Loosen these bolts to adjust

the limit switch position.

The limit switches are mounted on both sides of

the sanding belt. They are designed to stop the

sander if the belt travels too far to one side of the

top roller.

The limit switches are factory set and should

require no adjustments. However, if they stop

working correctly, they move during adjustments,

or they get replaced, proper adjustments will be

required.

To adjust the limit switches:

1. Center the sanding belt on the top roller.

Measure the distance between the edge of

the sanding belt and the limit switch lever.

This distance should be approximately

⁄2". If

this measurement is different, then loosen

the adjustment bolts shown in Figure 23 on

the incorrect side.

2. Slide the mounting bracket in the necessary

direction until there is a

⁄2" gap between the

edge of the belt and the limit switch lever.

3. Tighten the adjustment bolts to secure the

mounting bracket. Test the sander to verify

that operation returns to normal.

Oscillation

Return

Valve

Air Eye

Fork

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 59 60

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Grizzly G9983 Manuel d'utilisateur Page 29

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