Mean Value and Absolute Value
This device is capable of performing absolute value detection and mean value detection. These
detection modes are performed at the same time. For each of these modes, it is possible to set
the set point individually. Details of each detection mode are given below.
•
Absolute value detection
When the machine is operated in the continuous mode, detection is kept turned off for a while
during the initial 10 strokes (the initial number of bypasses or the number of times that
detection is turned off can be changed by system setting) and begins with the 11
th
stroke.
After the end of this bypass state, sampling of reference data for absolute value detection is
repeated 10 times. (The number of times that absolute value sampling is performed can be
changed by system setting.) During sampling, “Sampling” appears on the left side of the
screen. Mean value comparison is made during sampling. After completion of sampling the
mean value of sampled data is determined as the reference value with which the subsequent
data are compared at all times.
Trend Mode
(Learned Sample "Benchmark")
Trend Mode
(Learned Sample "Benchmark")
•
•
•
•
Compares present Sensor-to-target displacement
to Average of Displacement for Initial strokes
during "Benchmark" sampling.
Monitoring limits established for plus / minus
deviation based on preset values
Bypass function at start of operation inhibits
alarms during machine stabilization.
Slow changes over time NOT canceled.
•
•
Fault detection range set wider (±20 microns typ.)
to prevent nuisance alarms.
Changes over time detected (loss of lubrication,
machine heat up / cool down, changes in material
hardness, etc.)
Page 10
TMG-1200 Instruction Manual
