Introduction
36
MTS Landmark™ Tabletop Load Units - Product Information
Item
Component
Description
1
Encoder
Measures the angle of the rotary actuator’s travel. The
encoder is coupled to the rotary actuator.
2
Rotary actuator
Applies rotational forces to a specimen. The rotary actuator is
coupled to the linear actuator for axial-torsional load units.
3
LVDT
Measures the displacement of the linear actuator’s travel. The
linear variable displacement transducer (LVDT) is located
inside the actuator.
4
Crosshead lifts
Raise and lower the crosshead hydraulically to accommodate
different specimen sizes. The lifts are small hydraulic
actuators.
5
Crosshead
Moves up and down the column to accommodate different
sized specimens and fixtures. The crosshead is stiff and light
weight; it is one end of the force train.
6
Clamp ring
Provides additional protection against the crosshead slipping.
The clamp ring can be positioned anywhere along one of the
columns.
7
Force transducer
Measures the forces applied to specimen. It is a strain gage
type, accurate in both dynamic and static tests. Both axial and
axial-torsional force transducers are available.
8
Isolation pads
Dampen the load unit’s natural frequency to about 20 Hz.
9
Accumulators
Store hydraulic fluid under pressure to increase the actuator’s
response time. One accumulator connects to the pressure
line; the other to the return line.
10
Manifold
Serves as the junction point between the hydraulic power unit
(HPU), accumulators, servovalve, and actuator. The manifold
is mounted to the crosshead. It is also a hydraulic circuit that
connects the hydraulic components.
Component Descriptions
