Tsubaki TSM4000M2, Instruction Manual

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3. Usage
3. Usage 3. Usage
3. Usage
3.1 What is an M2 model?
The TSM4000M2 is an instrument for detecting abrasion of drill bits in drilling
machines driven by 3-phase induction motors. Even when abrasion occurs in a tool,
some constant-pressure type drilling machines may not cause a higher load ratio, but
instead result in a longer working time. The TSM4000M2 monitors this by detecting
the amount of electric power (area).
Load detection method
The Shock Monitor captures the voltage and current of the motor used for driving
equipment and detects the power consumption of the motor.
Monitoring method
The M2 model performs monitoring by using two systems of integrated value
monitoring and one system of absolute value monitoring. The integrated value
monitoring totals the instantaneous electric power and assumes the area for one
process as a load ratio. When the load ratio reaches or exceeds the upper limit level
due to overload or other abnormalities, OUT2 is output. When the load ratio decreases
to or goes below the lower limit level due to working failure caused by a broken drill bit
or improper workpiece transportation, OUT1 is output. On the other hand, the absolute
value monitoring activates relay OUT3 by detecting an overload when any machine
trouble occurs, such as a foreign material getting stuck. This signal can be used to stop
the motor for protection against overload of the equipment.
Operation of relative value monitoring relays OUT1 and OUT2
After the Start Time finishes, the power integration starts when the section between
terminals X1 and CM is short-circuited. There are two integration time settings which can
be set with a parameter: 1) The period while X5 is ON; and 2) the period of the parameter
setting time which starts after X5 turns ON. The load ratio is calculated by dividing the
obtained integral power by the product of the motor rated capacity and setting time
(reference integral power) and expressing the result as a percent.
If the result obtained at the completion of the integration is equivalent to or lower than the
lower limit level, the OUT1 relay provides a one-shot output for one second.
If the integration result is equivalent to or higher than the higher limit level, the OUT2
relay provides a one-shot output for one second.
Operation of absolute value monitoring relay OUT3
When the load ratio reaches or exceeds the OUT3 level (for example, an absolute value
of 100%) due to machine trouble such as a foreign material getting stuck and this state
continues for a specified period (Shock Time) or longer, relay OUT3 issues an output.
3.2 Other functions
Load condition recording
Detected electric power values can be output as analog voltage signals.
Power detection response setting
When the load pulsates frequently due to the resonance or jerking of the equipment,
you can delay the response of the power detection. This suppresses the pulsation of the
detected value and improves the accuracy of the detection of abnormal load.
Selecting detection levels
If the load condition varies for each work process of the equipment, up to eight
abnormality detection levels can be set and switched.
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Integration time [s]
Rated integration
time [s]
× × × ×100 100 100 100
Load ratio [%]
Integral power [kWs] Reference integral power [kWs]
= = = =
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Motor capacity [kW]