MTS Series 244 Actuators - Manual (Page 58)

About Operation
This section describes how to use the Series 244 Actuator when side loads are applied during testing.
Warning:
Exceeding the maximum attached mass can cause unpredictable actuator movement.
Unexpected actuator movement can result in injury to personnel or damage to equipment.
Ensure that the maximum attached mass listed on the actuator ID tag is not exceeded.
Actuator ID
A plate on the Series 244 Actuator (typically located on the front end cap opposite the drain line) contains
the following information:
• Model number
• Serial number
• Force rating
• Area
• Stroke specifications
This information is required when contacting MTS Systems Corporation regarding the actuator.
Operating Considerations
Piston rod banding can occur if the actuator is operated for a long period of time at a moderate to high
frequency, with short stroke displacement and loads of 25% or more of the actuator capacity. Piston rod
banding is the aggravated erosion of the piston rod chrome plating in a band slightly wider than the width of
the seal encircling the circumference of the piston rod.
If the actuator is being used for this type of testing, the starting position of the actuator piston rod should be
changed approximately every one million cycles. This will extend the life of the piston rod and minimize the
possibility of banding. If the system configuration allows it, the piston rod starting position can be changed
by using the displacement transducer conditioner zero control and repositioning the load frame crosshead
or fixture.
58 Series 244 Actuators Product Information
Operation