Valco Cincinnati VC350A, Manual

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Section 6 — Installation
VC350A Flexoseal ® System
Valco Cincinnati 6-7
Table 6-1. Encoder Configurations
* The JP2 switch on the main board should be in the “ENB-500” position for the VDD 250 and VDD 500
encoders in imperial mode for wheel-driven encoders.
Note! Table 6-1 is based on a 10-inch measuring wheel for imperial measurement or a 250-mm wheel for metric
measurement.
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.
Note! The wheel of the encoder assembly should ride on the bottom side of the belt on the drive side.
Table 6-1 also shows you what your resolution should be, based on what type of encoder you are using. Once you
have determined the resolution, a black marker should be used to color in the decimal point on the front-panel
pushwheels
not being used . See Section 7—Initial Setup , Figure 7-1.This leaves a white decimal point in the correct
position on each pushwheel pattern switch.
Encoder Type Max. Glue Pattern Resolution Nominal Ratio Compensation Setting JP2 Position
VDD 250 999.9 inch
9999 mm
0.1 inch
1 mm
1.9999
1.0000
ENB-500
STD.
VDD 500 999.9 inch
9999 mm
0.1 inch
1 mm
1.0000
0.5000
ENB-500
STD.
VDD 1000 99.99 inch 0.01 inch 1.0000 STD.
VDD 2500 999.9 mm 0.1 mm 1.0000 STD.
Gear-Driven Encoder
The gear-driven encoder assembly (Figure 6-8) is common on corrugated box-making machines. The encoder
assembly is driven by a split and linked gear, which is mounted onto the drive shaft of the machine. Gear sizes
(which are used to determine ratio compensation numbers) will vary from machine to machine (see Appendix B for
ratio compensation settings and gear combinations). For imperial systems, VDD 500 encoders should be used for
inch measurements, and the JP2 switch on the main board should be in the “STD” position. The following formula
can be used to determine the correct combination of gear teeth and encoder to achieve a ratio compensation setting
of approximately 1.0:
= Ratio compensation setting (SW3-SW7)
.
.
.
Teeth-S x Counts
Teeth-E 100
Travel —
18 —
.
.
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 encoder revolution
Travel = Product travel in inches (or millimeters divided by 25.4) per revolution of the drive shaft
Example:
Using a 92-tooth split line shaft gear (driver), a 24-tooth encoder driven gear, a 500-pulse encoder, and 18 inches
(or 457 millimeters divided by 25.4) of travel per drive shaft revolution.
Therefore, the ratio compensation setting should be .9391.
92 x 500
24
100
= .9391