Dictator 50 BK-Z Manuel Technique page 21

5) Placing and Fixing the
Kevlar Rope of the
Spring Rope Pulley
6) Tensioning the
Revolving Toothed Belt
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C) Installation of the DICTAMAT 50 BK-Z - cont.
Regardless of the closing direction (ill. 3a and 3b), the Kevlar rope is fixed
directly to the door or the wheel hanger, as shown in ill. 10a or 10b.
To reduce friction on the wheel hanger, please make sure that the rope
of the spring rope pulley always pulls straight and the wheel hangers
don't become wedged. The optimum would be, if the rope was aligned
with the X axis of the door.
Ill. 10a
Before finally tensioning the toothed belt, you have to check again
whether the toothed belt is perfectly aligned. If necessary, once more
align the LD 50 radial damper, the idler pulley and the door actuator.
For tensioning the toothed belt the belt tensioner may be open or closed.
But you have to make sure that the attachment screw (see ill. 11a) has
been removed before.
The toothed belt is tensioned by means of the internal hexagon SW 5.
Turn it until the toothed belt has the desired tension. The tension shouldn't
be either too soft or too strong. With a too soft tension the toothed belt
still sags. Is it tensioned too much, this causes high friction which will
reduce the closing force. When you have achieved the desired tension,
make sure no tooth is visible in the hole (see ill. 11b). Now screw in the
attachment screw.
Internal hexagon SW 5
Attachment screw
Ill. 11a
Technical Manual
DICTAMAT 50 BK-Z
Ill. 10b
Ill. 7
Here no tooth
may be visible.
O
Ill. 11b
Page 02.090.07