User guide

Operation l 4-51

Operation

Mode Page Descriptions - Cutter

Modes (continued)

Follower Mode

Follower Mode is similar to Flywheel Mode where the blade spins continuously.

However, in this mode the operator sets a length and the blade spins at the RPM

needed to make that length. The cutter calculates a gear ratio based on length and

puller speed. It then remains at that gear ratio. This mode is also known as Gear

Lock. The line speed should remain stable within ±5%. If the gear ratio required

to make the product causes the blade to exceed the upper or lower RPM limits the

cutter will stop.

Cuff Mode

Cuff Mode is used with corrugated style products that have cuff sections. It uses a

sensor to detect the cuff on the upstream side of the cutter and the encoder to pro-

vide the cuts at an offset distance after detection. Cuffs and corrugations are pro-

duced in a mold block style puller. This machine is known as a Corrugator.

Product exits the corrugator then goes into the Combination Puller/Cutter. The

cuff is detected and a cut is made at the required position within the cuff.

Cuff detection is usually made by a sensor built into the in-going cutter bushing. It

looks at the cross section of product at the edge. The control must be programmed

with details of the cuff such as if it is opening or breaking the light beam of the

sensor. Also, the length must be sustained at a certain level before the section can

be considered to be a cuff. The acknowledge length must be able to differentiate

between cuff and corrugations.

Once the cuff has been acknowledged, up to three cuts may be made. The time

from the blades’s parked position to its cut position affects the first cut. A change

in line speed will also affect this position. It is important to maintain a steady line

speed. Cuts 2 and 3 are optional. Cut 2’s distance is relative to Cut 1 and Cut 3’s

distance is relative to Cut 2. The maximum number of cuts per minute must not

be exceeded in this exercise. Cuts that are attempted that are not allowed will be

ignored.

See Operation Section entitled, Cuff Page Description.