
B-65235EN/02 START-UP PROCEDURE 4. OPERATION CONFIRMATION METHOD
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4.2.1
Checking the Control Power Supply Voltage
Check pin Ratings
24V - 0V
24V ±10%
5V - 0V
5V ±5%
15V - 0V
15V ±10%
-15V - 0V -15V ±10%
4.2.2
Checking the Motor Instantaneous Current
The motor instantaneous current can be measured by
observing the voltage across the 0V and IR or IS check pins
on an oscilloscope. This measurement cannot be done
correctly with a volt-ohm-milliammeter.
The relationships between the motor instantaneous current
and the measured voltage are as described below. The servo
amplifier name has a number enclosed in a box "¨". This
number is a limit to the motor instantaneous current. It is
determined so that when the motor current reaches the
limit, the measured voltage is ± 4V. Therefore, the
coefficient to calculate the motor current is obtained as
follows.
Then the motor instantaneous current can be obtained by
multipling this coefficient by the voltage observed on the
check-pin.
For example SVU20
The servo amplifier name
SVU¨
Limit to Motor instantaneous current
Limit to Motor
instantaneous current (A)
Coefficient to caliculate
the motor current (A/V)
12 3
20 5
Limit to Motor
instantaneous current
[AV]
Coefficient to calculate the motor current =
Coefficient to calculate
the motor current
4V
=
20A
5 [A/V]
4V