Installation
VC3500 User’s Manual
Valco Cincinnati
17
Encoder Installation
Mechanical Installation of Encoder
An encoder must be installed in order for the control to determine the speed of the parent machine. For best results,
100 pulses per inch (25.4 mm) of product travel should be supplied to the VC3500. If less than 100 pulses per inch
(25.4 mm) are supplied, poor resolution may result in pattern placement errors. If more than 100 pulses per inch
(25.4 mm) are supplied, the maximum specified speed of 2000 feet/min (610 m/min) must be reduced.
There are two primary types of encoders:
• Wheel-driven encoder
• Gear-driven encoder
Wheel-Driven Encoder
If using a wheel-driven encoder (Figure 9), a VCE-1000 encoder with a 10-inch measuring wheel is recommended.
To install a wheel-driven encoder, follow these steps:
1. Mount the encoder’s bracket to the frame of the parent machine.
2. Ensure that the wheel of the encoder rides securely against the belt and does not slip.
3. In the level-4 menu screen, set ratio compensation to 100 pulses.
Gear-Driven Encoder
The following formula can be used to determine the correct combination of gear teeth and encoder for approxi-
mately 100 pulse per inch (25.4 mm):
Teeth-S
x
Counts
=
Pulses per inch (25.4 mm) of travel
Teeth-E
Travel
Teeth-S
=Number of teeth on the line-shaft driver gear
Teeth-E
=Number of teeth on the encoder driven gear
Counts
=Number of encoder pulses per revolution
Travel
= Product travel in inches (or millimeters divided by 25.4) per revolution of the
drive shaft
Figure 9. Example of a Wheel-Driven Encoder
Summary of Contents for VC3500
Page 1: ...VC3500 User s Manual Software Version 3 X Manual Number MCO35 Manual Release Date July 1999 ...
Page 19: ...Installation VC3500 User s Manual Valco Cincinnati 16 Figure 8 Internal Connections Diagram ...
Page 88: ...VC3700 User s Manual Software Version 3 X Manual Number MCO34 Manual Release Date July 1999 ...
Page 181: ...VC3500 VC3700 Troubleshooting Manual Manual Number MC048 Release Date May 1999 ...
Page 185: ...VC3500 VC3700 Troubleshooting Manual Valco Cincinnati Page 1 System Level Documents ...