MTS Systems 318 Series Product Information page 89

318 Load Unit
3. Check the alignment.
In this step, you check the alignment between the force transducer and the
actuator.
Zero
Read
along
the edge
360°
Attaching and Zeroing the Indicator
A. Attach the dial indicator to the actuator.
On a low profile force transducer, adjust the indicator to take the
reading along the edge of the loading surface.
On cylindrical style force transducers, adjust the indicator so that its
stylus just touches the polished bottom edge of the transducer.
B. Zero the indicator.
C. Slowly turn the actuator to rotate the indicator 360° around the force
transducer.
Stop frequently to take indicator readings. Keep your hands off the
actuator and indicator when taking the readings. Compute the total
indicator runout (TIR). Take the maximum dial indicator reading and
subtract the minimum dial indicator reading.
L U R
OAD NIT ATING
250 kN (55 kip) or less
500 kN (100 kip)
D. If the TIR is 0.038 mm (0.0015 in) or less, the force transducer is
accurately aligned with the actuator. Go to Step 6.
If the TIR is greater than 0.038 mm (0.0015 in), the force transducer
needs to be aligned with the actuator. Start over with Step 3.
Routine Maintenance Overview Checklist
.
360°
TIR
>0.038 mm (0.0015 in)
0.051 mm (0.0020 in)
Read
along
the edge
Zero
Maintenance 89