Technical data

Operating manual ALX 73x | file version 02 | 03/2012 Mechanical settings | 77
S TARTUP AND OPERATION
ALX
73x
GB
Setting the ribbon tension
For optimum printing results, the ribbon must run with-
out creases. This can be achieved by correctly setting
the torque on the rewinding mandrel and the braking
torque on the unwinding mandrel.
The factory settings cover a wide range of different rib-
bon widths. It may be necessary to readjust the ribbon
tension for very narrow or very wide ribbons.
The braking torque of the ribbon mandrels can be ad-
justed using the red plastic hex bolts [72A] on the rib-
bon mandrels. Turning clockwise increases the torque.
The caps are used to lock the bolts [72B] into place so
that they are not adjusted unintentionally.
The entire length of ribbon must run evenly and crease-
free between the mandrels. The following parameters
are helpful for adjustments:
The ribbon…
• is slack or has creases
• is wound too loosely
 Increase unwinding/winding torque (turn bolt clock-
wise).
The ribbon…
• stretches visibly or tears during the printing process
• is not being transported properly
 Reduce unwinding/winding torque (turn bolt anti-
clockwise).
[72] Ribbon mandrels on the ALX 73x.
A Ribbon rewinding mandrel (without cap)
B Ribbon unwinding mandrel
B
A