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1 - 56 S tudent Guide SIPLACE X 13 MTC 2 Edition 09/2005 56 Fig. 13.3 - 20 Checking and setting the belt tension Key 1 Drive belt ( shown here for tower 2) 2 Motor mounting block with clamping screws (shown here for towe…
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Student Guide SIPLACE X
Edition 09/2005 13 MTC 2
55
13.3.4 Adjustments feed axes
Fig. 13.3 - 19 Overview of the feed axes (cover plates and belt covers removed)
Key
1 Feed axis, tower 1
2 Feed axis, tower 2
3 Servo motors of the feed axes
4Drive belt
5 Toothed belt
6 Disengaging mechanisms
7Driver
13.3.4.1 Belt tension
Tools and accessories 13
– Belt frequency measurement device (inductive)
– 2 toothed belt tension stickers
– 1 set of hexagon socket wrenches
– 1 set of open-ended wrenches
2
1
3
4
5
6
5
6
7
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Student Guide SIPLACE X
13 MTC 2 Edition 09/2005
56
Fig. 13.3 - 20 Checking and setting the belt tension
Key
1 Drive belt (shown here for tower 2)
2 Motor mounting block with clamping screws (shown here for tower 1)
3 Adjustment screw, drive belt (shown here for tower 1)
4 Measuring point, drive belt (shown here for tower 2)
5 Toothed belt (shown here for tower 1)
6 Eccentric axle of toothed belt with clamping screw and flats for setting (shown here for tower 1)
7 Measuring point, toothed belt (shown here for tower 1)
8 Outer deflection roll (shown here for tower 1)
9Driver
Preparatory measures 13
➠ Empty the MTC 2 completely (see the User Manual).
➠ Undock the MTC 2 from the SIPLACE station (see User Manual).
➠ Remove both cover plates between the rails of the feed axes.
Checking and setting the drive belt 13
➠ Carry out the relevant preparatory measures (see section 13.3.4.1 "Preparatory measures").
➠ Measure the belt tension with the belt frequency measuring device in the following way:
➠ Cause the drive belt to oscillate and measure the frequency in the middle of the sloping
surface between the motor axis and the belt wheel (for the measuring point, see
Fig. 13.3
2
4
1
6
3
7
5
9
8
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Student Guide SIPLACE X
Edition 09/2005 13 MTC 2
57
- 20, item 4). You must set the belt tension if the measured frequency deviation deviates
from the nominal value
(120 Hz ± 5 Hz):
➠ Turn the adjusting screw of the drive belt as far as it will go. Before doing this you will need
to loosen the lock nut.
➠ Loosen the two clamping screws on the mounting block of the motor.
➠ Use the adjusting screw to raise the belt tension (by turning in a clockwise direction) or
lower it (by turning in an anticlockwise direction), until the nominal frequency is achieved.
Tighten the lock nuts each time you measure the belt tension.
➠ Firmly tighten the clamping screws and varnish them with red screw locking varnish.
➠ Check the belt tension again.
➠ Secure the cover plates and dock the MTC 2 onto the SIPLACE station (see the User Manual).
➠ Check the zero offset of the feed axis if you have changed the belt tension.
Checking and setting the toothed belt 13
➠ Carry out the relevant preparatory measures (see section 13.3.4.1 "Preparatory measures").
➠ Measure the belt tension with the belt frequency measuring device in the following way:
➠ Cause the toothed belt to oscillate and measure the frequency - from the underside of the
belt - in the middle between the outer deflection roll and the first deflection roll of the drive
(for the measuring point, see
Fig. 13.3 - 20, item 7). Ensure that the driver is approximately
in its reference position.
You must set the belt tension if the measured frequency deviation deviates from the nominal
value
(70 Hz ± 2 Hz):
➠ Place the open-ended wrench on the setting flats of the eccentric axis.
➠ Loosen the clamping screw on the eccentric axis and maintain the position of the axis with
the open-ended wrench.
➠ Raise or lower the belt tension with the open-ended wrench (turning it in a direction
depending on the position of the eccentric axis), until the nominal frequency is achieved.
Firmly tighten the clamping screw each time you measure the belt tension and varnish it
with red screw locking varnish.
➠ Check the belt tension again and make sure the screws are varnished with red screw
locking varnish.
➠ Secure the cover plates and dock the MTC 2 onto the SIPLACE station (see the User Manual).
➠ Check the zero offset of the feed axis if you have changed the belt tension.
13.3.4.2 Limit switch
Tools and accessories 13
– 1 set of hexagon socket wrenches, 1 set of screwdrivers
Preparatory measures 13