00193631-0602.pdf - 第59页
Adjustment Instr uctions MTC 2 5 Feed axes 12/2007 Edition 5.1 Belt tension 59 5.1.2 Prep aratory measures Empty the MTC 2 completely (see the Use r Manual). Undock the MTC 2 from the SIPL ACE station ( see User Manu…
5 Feed axes Adjustment Instructions MTC 2
5.1 Belt tension 12/2007 Edition
58
5.1 Belt tension
5.1.1 Tools and accessories
– Belt frequency measurement device (inductive)
– 2 toothed belt tension stickers
– 1 set of hexagon socket wrenches
– 1 set of open-ended wrenches
Fig. 5.1 - 1 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)
9. Driver
2
4
1
6
3
7
5
9
8
Adjustment Instructions MTC 2 5 Feed axes
12/2007 Edition 5.1 Belt tension
59
5.1.2 Preparatory measures
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.
5.1.3 Checking and setting the drive belt
Carry out the relevant preparatory measures (see section 5.1.2 "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 sur-
face between the motor axis and the belt wheel (for the measuring point, see Fig. 5.1 - 1,
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 lo-
wer 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 (see section 5.2.3 "Checking and setting the zero offset")
if you have changed the belt tension.
5 Feed axes Adjustment Instructions MTC 2
5.1 Belt tension 12/2007 Edition
60
5.1.4 Checking and setting the toothed belt
Carry out the relevant preparatory measures (see section 5.1.2 "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. 5.1 - 1, 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 depen-
ding 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 lok-
king 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 (see section 5.2.3 "Checking and setting the zero offset")
if you have changed the belt tension.