AccuWeb
®
Linear Actuators
84
Introduction
AccuWeb linear actuators are available with a wide variety of motor technologies, power ratings,
stroke lengths, and end-of-travel sensor options:
• Motor technologies include brush and brushless DC motors. Power ratings span the range of
20 to 746 watts (1.0 HP).
• Standard stroke lengths range from ± 1” to ± 6” [± 25mm to ± 152mm]. Other lengths are
available upon request.
• End-of-travel options include limit switch or potentiometer feedback. Potentiometer feedback
permits quick adjustment of end-of-travel and servo-center limits by setting controller
parameters. All actuators have servo-center capability.
Setup
Actuators with limit switches (MME, MNE, and MX) actuators require no setup. Their end-of-travel
limits are factory set.
Actuators with potentiometer feedback (TA, MA, MT, SF, and HF) may require some setup. They
have adjustable end-of-travel limits and these may need to be changed in order to prevent
mechanical jamming of the actuator or guide mechanism. Use the following table to set the initial
values of the In Limit, Out Limit, and Servo-Center Position parameters. Refer to page 17 for
more information about Setting Screen.
Caution: To prevent mechanical jamming of the actuator do not set the end-of-travel limits
beyond the range of values shown in the table. Also, make sure the limits conform to the following
relationship:
In Limit ≤ Servo-Center Limit ≤ Out Limit
End-of-Travel Limits
Actuator
Model Number
Stroke Range
inches [mm]
In Limit
(parameter 9)
Servo-Center
(parameter 11)
Out Limit
(parameter 10)
MA 0.94 [25] ≥ 25 128 ≤ 230
TA-1 2.00 [50] ≥ 15 128 ≤ 235
MT-1 2.00 [50.8] ≥ 36 128 ≤ 220
MT-2, SF-2 4.00 [101.6] ≥ 36 128 ≤ 220
MT-4, SF-4 8.00 [203.2] ≥ 36 128 ≤ 220
MT-6, SF-6 12.00 [304.8] ≥ 36 128 ≤ 220
HF-3 6.00 [152.4] ≥ 51 128 ≤ 205
HF-6 12.00 [304.8] ≥ 51 128 ≤ 205
Maintenance
Lubrication:
The only lubrication required for the linear actuator is the lead screw assembly. Lubricate the lead
screw after every eighteen months of operation. Apply a small amount of white lithium grease to
the lead screw.
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