Rev AB Installation of Printhead and Ink Cartridge 3-23
Videojet 8520 Operator Manual
The shaft encoder must ideally be mounted to run on the conveyor, close
to the printer, in order to accurately measure the product speed. Any
discrepancy between measured and actual speed can result in poor print
quality.
The use of a quadrature mode encoder is strongly recommended.
Installation of the External Shaft Encoder
To ensure the shaft encoder transmits the actual product speed consider
the following:
• Install the shaft encoder as close to the printheads as possible (ideally
in the same track).
• Use the correct measuring wheel (aluminium/rubber/plastic) in
order to achieve speed measurements without slippage.
Note: If you are using a different shaft encoder, refer to the Service Manual
for more information.
Figure 3-34: Mounting the External Shaft Encoder
1. Conveyor belt
2. Printheads
3. Photoelectric cell
4. Shaft encoder
Figure 3-35: Versions of Measuring Wheel
Solid aluminium,
smooth (standard)
Aluminium with
studded rubber
cover
Solid aluminium
with cross pokes
Plastic, smooth
To Next Page
Loading...
