Adjust The Grip Clamp Rate - MTS Systems Landmark 370 Series Product Information

Operation
4. Tighten the crosshead clamping bolts to secure the crosshead in place.
Torque the clamping bolts according to the torque settings shown for Step 1 in the following
table. Use the bolt sequence shown above. Then torque the crosshead bolts to the values in
Step 2 and so on until Step 4 is complete.
Step 1
20 N·m (15 lbf·ft) 171 N·m (126 lbf·ft) 190 N·m (140 lbf·ft) 190 N·m (140 lbf·ft)
5. Position the clamp ring.
Slide the clamp ring on the column just under the crosshead position and tighten it.

Adjust the Grip Clamp Rate

The clamp rate determines how fast the grip can clamp a specimen. Experiment with a dummy
specimen to find the best setting.
1. Ensure that both the upper grip control and lower grip control are in the unclamp position.
2. Turn on electrical power at the test controller.
3. Turn on low or high hydraulic pressure.
4. If needed, move the crosshead or actuator so that the dummy specimen can be easily installed
in the lower grip.
Warning:
The crosshead is very heavy.
A dropping crosshead can crush hands, damage grips, and smash specimens.
Be careful when working in a crush zone. To reduce the hazards in this procedure,
observe the following:
Set and enable displacement interlocks to limit the actuator's movement.Ensure that
the crosshead is locked.
Ensure that the columns are clean and dry.
Keep your hands out of the crush zone except when performing the steps needed to
complete this procedure.
5. Turn the Rate control fully clockwise for the slowest clamp speed.
6. Fully install the dummy specimen in the lower grip.
7. Cycle the lower grip control between the clamp and unclamp positions to clamp and unclamp
the specimen.
72
Step 2 Step 3
MTS Landmark™ Tabletop Load Units - Product Information
Step 4