Document Number: P-SS-004-09 Rev 5
Old Numbers (AS6007H, A-SS-004-20208)
Revised 11/20/2003
www.DanaherMotion.com
Page
3
Multi-pulse generator/
Handwheel input
SE
R
V
O
ST
A
R
S600
Encoder input
Resolver/
sine encoder
feedback
Electronically-
geared
drive
Electronically-
geared
motor
Operator control panel
Figure 3: Following a Potentiometer
Following a Pulse/Direction Signal
For some applications, it is useful for a servomotor to follow a pulse or direction input. For
example, pulse and direction inputs are generated by some stepper motor controllers. By using
electronic gearing, a SERVO
STAR
S600 is controlled by a stepper motor or similar controller.
SE
R
V
O
ST
A
R
S600
Encoder input
Resolver/
sine encoder
feedback
Electronically-
geared
drive
Electronically-
geared
motor
Step/direction
output
Stepper
motor
controller
Figure 4: Following a Stepper Motor Controller
Adjusting the Gear Ratio in Realtime
Some applications require that the gear ratio be controlled in realtime. An example is a web-
tensioning application processing soft material. The material is stretched across two rolls. The
faster the outtake roll spins, the greater the tension held across the web. The SERVO
STAR
S600
provides several ways to adjust this gear ratio. Figure 5 shows a control scheme where one analog
input commands speed of the master axis and the slave axis follows that command according to the
gear ratio. The ratio is adjusted in realtime by the slave’s analog input.
