QLC, Inc.
Rewind Slip Clutch Adjustment 311xNV series Page 1 of 3
(800) 837-1309
Our name:
QLC,
INC.
Our products:
Pressure sensitive labeling equipment and bar code application systems
Our goal: Quality of products, processes, and people
Our address: 537 Progress Drive, P.O. Box 116, Hartland, WI 53029
Our phone:
262-367-1400
800-837-1309
Fax: 262-367-1405
Our Internet link: E-mail:
Web site:
www.qlc-labeling.com
Rewind Slip Clutch Adjustment – Label-Aire 311xNV series
You may need to adjust the rewind slip clutch if the rewind mandrel is not turning fast enough to take up
the label liner, or if the rewind mandrel torque is such that the liner is breaking. When making adjustments
to the rewind slip clutch (drawing below) note that the spring tension can be adjusted by adding or
removing flat washers. Sometimes it may be necessary to replace the o-ring and slip clutch disk.
To increase friction drive (rewind), add flat washers P/N 7101697, to compress or increase spring tension,
(drawing below). To decrease friction drive, remove flat washers P/N 7101697, to expand or lessen spring
tension, (drawing below). Flat washers should be added or subtracted one at a time until proper drive is
achieved.
NOTE:
Depending on the attitude of the machine, you will need to observe the response of the rewind
mandrel from the beginning of a roll, (no web liner on rewind mandrel), to the end of the roll (a full web
liner roll on the rewind mandrel). As waste builds up on the rewind mandrel, the weight will play a roll in the
way that the rewind operates. Some further adjustments may still be necessary to compensate for the
change in load from the beginning to the end of a roll of labels.
When replacing the o-ring and slip clutch disk (drawing below), it will be necessary to follow these
adjustment procedures to attain the correct web rewind tension. As the o-ring and slip clutch disk wear you
may have to periodically follow the adjustment procedures to maintain consistent web rewind tension.
Follow these instructions to adjust the rewind slip clutch tension.
(1)
Turn the [POWER] OFF (F).
(2)
Disconnect the machine A.C. power cord from the A.C. power.
(3)
Disconnect the A.C. power cord from the IEC receptacle on the machine.
(4)
Use a #1 Phillips screwdriver to remove the screws from the enclosure cover. Remove the enclosure
cover.
(5)
Use a #1 Phillips screwdriver to remove the screw from the end of the drive shaft.
(6)
Carefully remove the flat washer, and the compression spring.
a.
Older units have a Phillips screw to remove washer and spring (diagram below)
b.
Newer units have dual thumb screws to remove washer and spring (photo below)
(7)
Install one flat washer (P/N 7101697) to increase the rewind drive, or remove one flat washer to decrease
the rewind drive.
(8)
Carefully re-install the compression spring, the flat washer, and the screw.
a.
Older units tighten the Phillips screw onto the rewind shaft.
b.
Newer units tighten the locking nuts onto the rewind shaft (shown below).
(9)
Use a #1 Phillips screwdriver to install the enclosure cover.
(10)
Reconnect the A.C. power cord to the IEC receptacle on the machine.
