QuickLabel R-310 QuickWrap - Manual (Page 9)

9
FUNCTION OF UNWIND ASSEMBLY
The unwind is simple, but important to the operation of the R-310 machine.
When the motor starts, the web and labels are pulled through the machine by the
drive roller. The label stock pulls on the brake arm, releasing the brake, and
allows the roll of labels to unwind. When the motor stops, the brake arm returns
to the rest position. This movement tightens the brake band around the 3"
diameter main unwind hub and the roll of labels stops unwinding.
The R-310 has a fixed speed, AC drive motor which transmits power to the drive
roller. The AC drive is directly influenced by the load it is trying to pull. In this
case, the load is the tension of the brake arm spring and the weight of the roll of
labels. The brake arm spring shown below in Fig 3, should be fastened to the
unwind assembly mounting bar in the tapped hole which provides the least
amount of tension at the brake arm. (The hole closest to the hub.)
If the R-310 is dispensing a long label (10" for example), you may have to
increase the tension on the brake arm spring (Move spring attachment point to
lower hole - See Fig 3) to keep the brake arm from bottoming out.
The length and speed figures mentioned above are only examples. Your
observation of the unwind operation will be the best indication of when a tension
change may be needed.
Dancer Arm
Spring located in top
hole. Move to bottom
hole for larger labels.
Fig 3