WILLETT 430 - Throw Distance; Shaft Encoder; Internal Source; External Source

Installation: Throw Distance
Issue 2
11
Part No. 306-0430-102
Throw Distance
The optimum throw distance from the printhead to the product is 8 mm.
Shaft Encoder
Internal Source
If no external shaft encoder is to be fitted then set the
Shaft Encoder Source
to
Internal
, via the
Configure
menu. However, if the line speed varies then a shaft encoder
must
be fitted in order to maintain constant
message width.
A Width (Message Parameters) of 1 will provide the fastest print that the printer can achieve in each font using
the Internal Shaft Encoder option. The message width is increased by approximately 3% for each increment.
External Source
If an external shaft encoder is fitted then set the
Shaft Encoder Source
to
External
, via the
Configure
menu.
Figure 6 shows an external shaft encoder (
10
) connected via a cable (
9
) to the SHAFT ENCODER connector on
the connector panel.
The printer can be configured to accept two shaft encoder (quadrature) outputs. This allows the printer to
compensate for changes in direction of the production line.
Caution - Electrostatic Sensitive Devices
The printed circuit boards contain static sensitive devices. A suitably grounded, antistatic wrist strap
must be worn when working on or handling printed circuit boards.
If a quadrature shaft encoder is to be used you must do the following:
1
Set jumper JB2 (Figure 7 (
2
)) to position B.
2
Download the appropriate special software to the printer.
3
Set the Width Value to 1.
4
Disable Print Trigger 2.
Note: Using quadrature shaft encoders to determine changes of direction disables the width function
(ie it must be set to 1). If width control is required, an external divider box must be provided.