Specifications

10/31/02 Tech-304/DWO 14195 Page 12 of 39

3.3 Mounting Positioner on a Linear Actuator

Step 1. Mount the magnet assembly to the stem of the actuator. A coupler block normally is

needed to extend the magnet assembly outside the yoke area and into the sensing range of the

magnetic pick-up unit.

Step 2. Fasten the mounting bracket to the actuator.

Step 3. Mount the positioner to the mounting bracket. The positioner should be mounted so the

magnetic pick-up unit of the positioner is centered between the limits of the magnetic assembly’s

stroke. After mounting the positioner, the magnet assembly should be within 1/8” from the back

of the positioner (1/16” is ideal), (See Figure 3-5).

1/16”

Magnet Assembly

ICoT Assembly

Housing

Centerline of

Magnetic

Pick-Up Unit

(Position Sensor)

Actuator

Centerline

Location of Centerline

Lower Limit of Travel

Upper Limit of Travel

Actuator Split Block

(At Upper Limit of Travel)

Actuator Split Block

(At Lower Limit of Travel)

Full

Stroke

Stroke/2

Figure 3-5

Actuator Yoke

Actuators Split Block

Magnet Assembly

ICoT Assembly

Mounting Bracket

Magnetic Pick-Up

Unit (Position Sensor)

.062

Note: For Fisher actuators model 657 & 667 sizes 34 thru 70, Westlock Controls can supply a

slotted mounting kit design. This will allow the user to easily center the positioner sensor

between the limits of the magnet assembly’s stroke.