2
PT-55 User’s Guide
Machine Overview
D291308.4f.fm
Machine Overview
A. Load Cell Position Screw
Loosening this screw will allow positioning of the load cell assembly. Once the load cell is aligned
with the tape to be tested, tighten the screw to maintain the load cell position.
B. Load Cell
The load cell is a pressure transducer which converts the mechanical peel force into an electrical
signal. It can be repositioned so it aligns with the center of the tape being tested. It is connected
to the cover tape by an alligator clip. The alligator clip is attached to the cover tape while the car-
rier tape is connected to the carriage assembly.The cover tape remains stationary as the carriage
and carrier tape move away from the load cell. The amount of force applied to the cover tape as
the two separate is transferred from the alligator clip, through the chain, to the load cell.
C. Carriage Assembly
The carrier tape is attached to the motorized carriage assembly when taking a peel force reading.
The main components of the assembly are the motor and drive gear, tape sprocket, idler wheel,
and the tape guide. The motor and drive gear move the assembly along the linear track when a
test is started. The sprocket holes along the edge of the carrier tape are placed on the teeth of
the tape sprocket. This tape sprocket advances the carrier tape through the assembly as the
assembly moves forward. The idler wheel holds the carrier tape in place on the tape sprocket.
The tape guide holds the carrier tape at the proper angle for a 170-180 degree pullback.
Note:
The PT-55 is shipped with a carriage clamp
attached to the carriage assembly to prevent carriage
movement during shipment. The carriage clamp must be
removed before operating the PT-55
.
Figure 1.1
A
B
C
Figure 1.2
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