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O
b j e c t i v e :
A PLC is required to set constant motor speeds
so that a continuous web of paper can be automatically
fed into a machine. Once the paper is properly
loaded, the PLC will direct the motor to maintain
a constant tension on the web as the machine
performs its process. The PLC needs to control
the web speeds and tension levels by using
the PLC's digital outputs.
S
o l u t i o n :
A servo amplifier was chosen for this application.
The amplifier's operation mode was set to
“preset torques” and the operation
mode override was set to “preset velocities.”
The three digital inputs were assigned to
be “preset select inputs” and
the fourth input was reassigned to be the
“operation mode override input.”
All eight preset velocities and all eight
preset torques were set to customer specifications.
The PLC used only four digital outputs to
control eight different tension (current/torque)
levels and eight different speeds.
P
r o d u c t s U s e d :
Servo Amplifier
Servo Motor
Servo Encoder Cable
Servo Break Out Cable
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