Auto Lap Unwind

A central controller monitors roll size, web speed, web caliper, festoon and dancer positions as well as operator settings for auto roll stop and web tension. This information is provided to the operator in a touch screen at the operator control panel. The unwind is described in three groups; the unwinds, the splicer, and the festoon.

• Auto Clamps: The shafts are held in place with an automatic shaft clamp that is pnuematicly operated and cams over for a fail safe lock. The air cylinders are built with a magnetic pick up for feedback to the PLC.

• Sidelay: The unwind motor is mounted on a sub frame assembley that rides on three linear bearings for 4” of total sidelay travel. The frame is moved with a screw through a hollow shaft gearbox. The sidelay feature is available with a manual handle, electric slo-syn motor, or servo motor positioning.

• Dancer: The unwind tension from the feed station to the master roll is controlled with air pressure on the dancer air cylinders. Two air cylinders are fed 0-90 psi air from an electro pneumatic valve. The dancer air pressure is selected in the touch screen and modified during splicing to reduce web breaks.

• Pass through festoon: The 15 roller festoon accumulates aproxamatly 120’ of web in a stacked three pass design. When the festoon is in the lowest position limit the carriage idlers pass through the fixed idlers to allow the web to be passed through the gaps and sew it’s self up once the carriage is lifted.