Tsubaki TSM4000M1, Instruction Manual

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3. Usage
3. Usage 3. Usage
3. Usage
3.1 What is an M1 model?
The TSM4000M1 is intended for monitoring the contact between a workpiece and a
machine tool driven by a 3-phase induction motor, such as polishing machines,
cylindrical grinders, circular sawing machines, etc. It is best suited for applications to
for reducing the idle time between when the main shaft motor starts and rotates a
grinder or saw blade, and when the grinder or blade makes contact with the workpiece.
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 M1 model operates two systems of relative value monitoring and one system of
absolute value monitoring simultaneously. The relative value monitoring activates
relay OUT1 or OUT2 when a minute change occurs in the load. This signal can be used
as a delivery speed switching signal or a work completion signal. 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
When the Start Time finishes, the current load ratio (that is, the reference value for
relative monitoring) is automatically offset to 0%. After that, the load is monitored always
based on the value from which the reference value has been subtracted (that is, the relative
value to the reference value). If the relative value reaches or exceeds the preset OUT1 or
OUT2 level (for example, a relative value of +5% or +10%) and this continues for a specified
period (Shock Time) or longer, relay OUT1 or OUT2 issues an output. The offset operation
can be made in three ways when: 1) the Start Time finishes, 2) the
▲ and ▼ keys are
pressed, and 3) the section between terminals X5 and CM is short-circuited.
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.
Output relay switching
The output relay can be switched between Self-Hold and Auto-Reset.
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 due to different grindstones or
workpieces, up to eight abnormality detection levels can be set and switched.
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TSM4000M1