Model 5200 High-Level Orderpicker

While the lift truck is in guide mode, driving off the guide wire or losing its signal sounds the alarm (horn) and stops the lift truck.

Wire guidance stops and steering reverts to the operator when the auto/manual switch is flipped to manual.

System Description

A guide wire embedded in the floor has an AC (alternating current) magnetic field around it. This magnetic field is directly proportional to the amplitude of the current supplied from the line driver. Refer to PDSS-0051, Raymond Wire Guidance, for information on warehouse-installed equipment.

As the lift truck drives near a guide wire, a voltage is induced into the coils due to the AC current in the guide wire. As the coils get closer to the guide wire, the voltage increases. As the coils get farther from the guide wire, the voltage decreases. This voltage is amplified at the card in each sensor assembly and sent to the Filter Card.

The lift truck is equipped with two wire guidance sensors:

•Tractor sensor, installed under the front bumper, ahead of the drive unit

•Load sensor, installed between the baselegs.

The tractor and load sensors are identical. Each has 4 guidance coils. The 2 outside coils guide the lift truck and the 2 inside coils generate the near wire signal.

Three signals are sent from each sensor card to the Filter Card. See the table below.

Tractor Left (TL) Load Left (LL)

Tractor Right (TR)Load Right (LR)

Tractor Near Wire (TNW) Load Near Wire (LNW)