2.3 Control of step motor
Rotational speed/
control voltage
The diagram below shows the relationship between step motor rotational speed
and motor signal voltage.
If the rotor control step
motor receives a:
Then
0-10V signal less than 0.6 V
the motor stops
0-10V signal greater than 1.1 V
the motor starts
0-10V signal greater than 9.5 V
the motor runs at max rpm
The table below shows the maximum permitted step motor rotational speed – de-
pendent on the size of the VEX. If the rotational speed exceeds the given value, the
motor will become overloaded and shut down.
VEX
model
Max. speed
step motor
Max. no. of
revolutions in
step motor
per min.
Optimum no. of
rotor
revolutions
per min.*
Voltage
0 - 10V
VEX260
150
106.5
10
9.21
VEX270
150
132.5
10
9.42
VEX280
170
170
10
10
*When the rotor operates with this rpm, the highest temperature efficiency is ach-
ieved.
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Installation of the VEX
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Summary of Contents for VEX270HX
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