Apex Digital EZ Sander EZ3760M, Руководство по эксплуатации

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Problem Abrasive
Belt Does Not Track
1. First thing is we need to confirm Idler roll will move left to right .
A. Check that the light from the photo eye is passing to the reflector
and is not blocked by dust or dirt ? ( wipe off dust or dirt )
B. For Metal machines abrasive belt runs clockwise and when the
photo light is blocked the top idler roll should move to the right
( proper belt rotation or sanding belt will not track ).
C. For Wood machines abrasive belt runs counter clockwise and when the
photo light is blocked the top idler roll should move to the left .
( proper belt rotation or sanding belt will not track ).
2. If there is no movement of the idler roll at this point check for air pressure
to the tracking cylinder. Remove air line from cylinder ( see figure 3 ) below.
With airline off and you have light going from the photo eye to the reflector.
You should be able to block the light passage and the solenoid should
shift and air will either stop or pass to the cylinder, then as you let the light
pass across and block it again the air should change back and forth.
3. At this point if you still do not get have to the cylinder , we need to determine
If the solenoid is shifting. The photo eye directly powers the solenoid valve
so as you block the light beam or let the light pass across the solenoid should
change also. If this does not happen check with a meter if you are getting power
to the solenoid valve. Before checking for power you can use a nail or small
pencil , on the opposite end of the coil on the solenoid you can push the spool in
and out to see then if air changes to the tracking cylinder .
( spool in valve might be stuck ) If air changes this way now check if you are
getting power to the solenoid valve from tracking photo unit.
Idler roll moves but belt still does not track properly.
1. When the sanding belt runs to one side or the other and the roll has shifted
but the belt does not return this mean the idler has not gone far enough to
force the belt to return.