Chapter 2 Installation; Overview - Thermo Scientific 60-12 Operating And Service Manual

Chapter 2
Installation
2.1

Overview

The Models' 60-12C, F, G and ENC Speed Sensor must be attached to a pulley
shaft which turns at true conveyor belt speed. Normally, the tail pulley shaft or a
snubbing roll shaft satisfies this requirement. In installations where the tail pulley or
snubbing roll shaft is not accessible, an additional pulley must be installed
specifically for the speed sensor (see Section 2.4).
2.1.1 Coupling Installation
Two methods of coupling the speed sensor to the pulley shaft are shown in Figures
2-1 and Figures 2-2. Other methods may work as well, The most important
requirement is that the speed sensor remains free floating and not rigidly coupled to
the conveyor frame.
Note
Never mount speed sensor on a driven pulley
Use the following procedures for coupling installation
2.1.1.1 Method "A"
REC 3016 Rev M
Locate the exact center of tail pulley or snubbing roll shaft. Figure 5-1 may
be cut out and used as a centering guide. (Refer to Figure 2-1.)
1. Locate circle guide over tail pulley shaft and punch center. Drill a 1-3/4"
deep hole using a 17/32" drill. (Drilling a smaller pilot hole is helpful in
assuring correct centering.)
2. Tap this hole using a 5/8"-11 tap.
3. Clean out oil and dirt with an appropriate solvent and apply a thread lock
retaining compound, such as "LOCKTITE thread locker 262".
4. Thread in supplied stub shaft coupling (part #037711) so that coupling
collar bottoms out against tail pulley or snubbing shaft. See Figure 2-1.
5. Insert 60-12 speed sensor into coupling. Be sure to align shaft flat spot
with set screws on coupling. Tighten all set screws securely.
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