66
Chapter 4
Speed Following Feature
The tyer has the ability to automatically adjust the speed of its gathering belts so that the
belt speed changes as the conveyor speed changes. This minimizes the amount of
operator input required to operate the tyer. However, it may be necessary for the operator
to fine tune the belt speed, as explained later, to achieve the most desirable package.
Some baggers slowly ramp up to full speed when they are started. The Tyer’s speed-
following capability allows the speed of the belts to slowly ramp up to full speed as the
speed of the bagger is increasing. This prevents damaging of bags by pulling them too
far ahead of the flights as might occur if the conveyor started slowly and the belts started
quickly.
In order for the tyer to use automatic speed following, the tyer requires an additional input
signal to determine the conveyor speed. An Encoder is used to monitor a sprocket that
rotates with the conveyor.
If the encoder is not connected, or if the tyer senses that it is not getting any pulses from
the proximity switch, the Tyer’s controller will use only the settings of the BCD thumbwheel
switch on the operator's control box to set the belt speed. If the encoder is connected and
producing pulse signals, the tyer will automatically adjust the belt speed to follow the
conveyor speed and the BCD thumbwheel switch can be used to fine-tune the ratio
between conveyor speed and tyer belt speed. The speed of the belts needs to be
considerably faster than the conveyor speed, but the exact ratio of speeds depends upon
the package being run.
To Next Page
Loading...
