Digital Velocity Follower
10/11/2002 Page 10 of 13 TM.G5SW.045.DigitalVelocityFollower
Part 2: Widget machine - 1 : 1 follower (detailed explanation)
Overview:
In the above drawing there is a machine where one section has to follow another with an exact speed match. The portion of
the machine that is the “master” has an encoder mounted to a portion of the machine that is moving at line speed, such as a
line shaft. The follower is connected to a GPD515 with the CS007 software option (which includes the PG-W2 option card).
Machine Description:
The line shaft of the machine will produce 1 widget per revolution. There is an encoder attached to this line shaft which is the
quadrature / line driver type with a separate power supply. It will produce 360 PPR (pulses per revolution). This encoder is
attached to the follower drive’s PG-W2 card on terminals 10-13 with the shield on terminal 16.
The follower machine has a standard 4-pole motor on it. This motor is connected to a GPD515 with the CS007 software option
(includes the PG-W2 option card). The follower machine has a 25:1 gear reduction connected to the motor. One turn of the
output of the gear reduction corresponds to 1 widget.
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