L
R
7
Linear Unit KRF 8 80x40 ZR
Fastening bores
Timing Belt clamping device
Timing-Belt Drive KRF 8 40
Drive Side
R
: Right, 0.0.646.92
L
: Left, 0.0.638.97
The Timing Belt running through
the profile
Reverse Unit cover
3. The Reverse Units:
The Reverse Unit housings are made from a high-strength aluminium alloy.
The Reverse Units are supplied as preassembled construction kits.
Before you can fasten the Reverse Units to the threads that you cut into the
core bores of the profile, you will need to remove the covers from the Reverse
Units.
Do not disassemble the Reverse Units any further – fix them to the profile us-
ing the built-in fastening screws, which are accessed via an upper bore hole
located in each axle and the lower assembly keyholes.
In the Reverse Unit with integrated Timing Belt tensioning device, the lower
fastening screw is accessed through the keyhole in the tensioning screw.
Fastening screws M8, tightening torque: 25 Nm.
5 A/F Allan key.
The tensioning axle in the Reverse Unit has an adjustment range of 18 mm
(= 36 mm elongation in the Timing Belt)
The current setting of the Reverse Unit is indicated via a gauge on the side
of the unit.
Caution!
Ensure the Reverse Units are positioned correctly.
There is
one
Reverse Unit for tensioning the Timing Belt.
There are
two
Reverse Units for driving the axis.
The position of the drive shaft is different on each of these Reverse Units
and must be specified during project engineering.
4. The Timing Belt:
Timing Belt length: L
Z
= 2 x L
Profile
+ 190
Timing Belt pretension: max 1‰
Special Timing Belt:
•Toenablehigherspeeds
•Quietandsmoothrunning
•Tominimiseanypolygoneffect
The clamping mechanism for the Timing Belt is integrated into the carriage
plate – clamping plates hold the ends of the Timing Belt in the positive locking
toothing of the carriage.
Fit one end of the Timing Belt in place on one side of the carriage, ensuring
that all the teeth are engaged.
Next, screw the Timing Belt clamping device into place (tightening torque,
M6: 10 Nm).
Now feed the other end of the Timing Belt through the Reverse Units and the
profile to the opposite end of the carriage.
The profile does not need to be machined to accommodate the Timing Belt,
since a generous amount of space has already been provided.
To make it easier to feed the Timing Belt through the Reverse Units, first
remove the covers on the Reverse Units.
All the teeth on the Timing Belt should also be engaged in the clamping
mechanism at the other end of the carriage. You may need to shorten the
Timing Belt.
Next, screw the second Timing Belt clamping device into place (tightening
torque, M6: 10 Nm).
