00193631-0602.pdf - 第83页

Adjustment Instruct ions MTC 2 5 Feed axes 12/2007 Edition 5.5 Light barriers 83 5.5.5 Checking and setting the crash light barriers NOTE The crash light barrie r s each comprise a light bar rier which is activated by a …

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5 Feed axes Adjustment Instructions MTC 2
5.5 Light barriers 12/2007 Edition
82
Unscrew the clamping screws on the middle holder and move it by the following fixed adjust-
ment amounts (see Fig. 5.5 - 3):
-Tower 1, left side = 3 mm
-Tower 1, right side = 3 mm
-Tower 2, left side = 4 mm
-Tower 2, right side = 5.5 mm
Ensure that the status of the LEDs remains the same when you move the locked WTCs. If ne-
cessary, move the holders a little further away from the front edge of the WTCs.
Firmly tighten all clamping screws and varnish them when they have been set.
NOTE
The following must be observed for a functional test on the light barrier setting:
- Light barriers must not respond when the lifting axes are moved. When a preliminary setting has
been made, the lifting axis must therefore be moved in 0.1 mm steps over a distance
corresponding to the height of a WTC next to the light barrier to test the setting.
- If the light barrier responds, the emergency stop function is triggered. The emergency stop
status can only be reset, however, when the receiver receives a signal from the transmitter
again.
Loosen the clamping screws on the light barrier holder (transmitter and receiver). Move them
both in the direction of the feed track (away from the tower) until the receiver’s status indicator
switches from red to green. When moving the lifting axis, ensure that the front edge of the WTC
is positioned within the capture area (chamfer) of the adjustment gauge (see Fig. 4.1 - 1).
Adjustment Instructions MTC 2 5 Feed axes
12/2007 Edition 5.5 Light barriers
83
5.5.5 Checking and setting the crash light barriers
NOTE
The crash light barriers each comprise a light barrier which is activated by a waffle pack tray of a
specific height and is interrupted by a protruding component. Two LEDs indicate the switching
status of the sensor.
NOTE
Make the settings for the feed axis of tower 1 first and then the feed axis of tower 2.
The light barrier holder in the middle accepts the light barriers for both axes but can be set
separately (it comprises a base section and a movable section). When making settings, both the
holder for the sender and the holder for the receiver of the light barrier pairs must be moved.
Tower 1
Place the adjustment gauge turned by 90 degrees onto a tray in tower 1.
Unscrew the clamping screws of the holder for tower 1 and the middle holder (base section)
and place the bottom light barrier pair onto the middle of the gauge. Ensure that the holders do
not jam in their guide.
Firmly tighten the clamping screws. Ensure that the holders cannot be moved or turned any
more.
At this setting, the bottom light barrier pair should be activated by a height of
9.85 mm + 0.05 mm and must no longer be activated by a height of 9.75 mm + 0.05 mm.
Tower 2
Place the adjustment gauge for the crash light barriers onto the rail of the feed axis for tower 2.
Unscrew the clamping screws of the holder for tower 2 and the middle holder (movable sec-
tion). Ensure that the sender and receiver of the light barrier are aligned to each other (the
green LED must be activated). Ensure that the holders do not jam in their guide.
Firmly tighten the clamping screws. Ensure that the holders cannot be moved or turned any
more.
At this setting, the bottom light barrier pair must be activated at a height of 11.5 mm, while at
a height of 11.4 mm it must not be activated.
5 Feed axes Adjustment Instructions MTC 2
5.5 Light barriers 12/2007 Edition
84
Fig. 5.5 - 4 Checking and setting the crash light barriers
Key
1. Crash light barriers for tower 1
2. Crash light barriers for tower 2
3. Light barrier holder for tower 1 with clamping screws
4. Middle light barrier holder with clamping screws, base section
5. Middle light barrier holder with clamping screws, movable section
6. Light barrier holder for tower 2 with clamping screws
4
2
1
3
5
6