8
-
if this condition obtains, when the machine is switched on it displays "ERR10";
-
when the sensor arm is moved 2 mm away from the standby position, the microswitch is
closed; at this point the "ERR10" message is cancelled.
-
To adjust the position of the sensor, move it on its axis with the two nuts securing it to the
mount.
Checking the operation of the diameter encoder [di]
To check the operation of the diameter sensor, proceed as follows:
-
move the inside sensor to the standby
position (the arm is snug against the
support disk);
-
rotate and extend the arm until it rests
against the turntable shaft in the
position shown in the figure; check that
1000 +/- 10 marks have been read.
If the sensor does not read correctly,
check in sequence:
1)
the flat cable;
2)
the mounting of the sensor in its
housing;
3)
the adjustment of the reed microswitch;
4)
that reed sensor cable is connected correctly;
If the above checks do not reveal any defects, replace the encoder.
Checking the operation of the distance sensor [d]
Check that the total stroke is 490 +/- 10 marks;
If the sensor does not read correctly, check in sequence:
1)
the flat cable;
2)
the mounting of the sensor in its housing;
3)
the adjustment of the reed microswitch;
4)
that reed sensor cable is connected correctly;
If the above checks do not reveal any defects, replace the encoder.
Replacing the diameter encoder
-
Remove the diameter encoder complete with gear.
-
Remove the gear and fit it to the new encoder; tighten down the mounting nut.
-
Fit the new encoder plus gear to the sensor mount gear in such a way that the play
between the two gears is minimal at all positions.
-
Reconnect the cable to the diameter sensor (RP2).
Warning:
to reduce diameter reading
errors due to mechanical play, the
spring (A in the figure) must be
correctly preloaded. To check the
preload, immobilize the diameter
sensor arm and move the large gear
wheel (B in the figure) by hand in both
directions. If the spring is correctly
installed, when the wheel is released it
