3.3 Functional Sequence
For the description of the functional sequence we assume
that the CargoMaster’s climbing mechanism and the climb-
ers are at their highest position as shown in Fig. 3
This is the position in which one drives the CargoMaster on
level ground. It is further the position in which one can rest
the CargoMaster on its toe plate. In the following description
of the functional sequence this neutral or starting position
of the CargoMaster is called position 0°.
The First Phase
Drive the CargoMaster to the first step of the stairs in posi-
tion 0°.Push the UP/DOWN switch “UP” and the motor be-
gins to rotate. Both levers of the climbing system rotate
as well and the climbers move downward.
The climbers touch the ground
and take over the load. The motor
continues to rotate, and because
the rotating movement is
transfered to the climbers, the
frame is pushed upward, i.e.
lifted.
The motor lever’s rotation moves
from 90° to 120° and you notice
that the big wheels pass over the
edge to the next step. At approximately 180° the climbing
mechanism lifts the frame to the next step, and the big
wheels take over the load once more (see Fig. 4). This con-
cludes the first phase.
The Second Phase
Once the big wheels take over the load on the next
step at approximately 180°, the climbers are
lifted as well passing 210° and 270°.
At 330° the climbers are “retracted” sufficiently
so that the CargoMaster can be pulled back to the
edge of the following step (see Fig. 5). The final po-
sition, 360°, coincides with the starting position
0°, which concludes the second phase. Now you
can repeat the process.
5
CargoMaster
c141_gb_12/02
Fig. 3
90° 180°120°0°
Fig. 4
270° 330°
210°
Fig. 5
