Considerations; Performance; Weight; Power Consumption - Omron LD-60 User Manual

5.2 Considerations

Performance

The main performance factors to consider in designing a payload structure are the size,
weight, and center of gravity of the payload structure, and power requirements. Adding weight
to the platform tends to have less effect on run-time than adding electrical power requirements.
Operating your AIV on carpet will have a significantly shorter run-time than on hard surfaces.

Weight

On a hard surface, a certain amount of extra weight will not shorten the AIV's run-time very
much. When adding a payload structure with substantial weight, the center of gravity of the
entire AIV needs to be considered. This is particularly important if you intend to equip the plat-
form with a robot arm, which would be lifting items off-center from the platform.
A heavy payload structure, with most of its weight concentrated just above the platform, will
be much more stable than the same weight payload structure in which the weight is either off-
center or high above the top of the platform.
NOTE: The weight of your payload structure added to the weight of the parts it is
carrying must not exceed the rated capacity of your platform.

Power Consumption

Using devices on your payload structure that consume significant power will noticeably
shorten the run-time of the AIV. You should try to minimize such power consumption
whenever possible. The battery is rated at 1500 W*hr (1.5 kWh).
Examples of power-consuming payload structures would be one with a robot arm attached, or
any motorized fixture, such as a conveyor, as part of the payload structure. The standard Oper-
ator screen and light discs consume some power, but are not significant compared to the rest
of the platform.

Payload Bay Access

The area between the platform and your payload structure is the payload bay. You will occa-
sionally need to access the platform and the connectors in the payload bay. This is where you
can access all of the platform power and I/O connectors. It's a good idea to provide for access
to this when designing your payload structure.
If the payload structure is small and light enough, it can just be lifted off of the platform to
access the connectors in the payload bay. Care should always be taken not to damage any wir-
ing between your payload structure and the platform.
A larger, heavier payload structure may need some form of hinge, so that the payload struc-
ture can be tilted out of the way while you access the payload bay. Consideration should be
given to harness length and position so that this can be accomplished without disconnecting
or damaging any connectors or harnesses.

Dimensions

You must keep your payload structure no wider and no longer than the platform. Add
whatever features are needed by your application above the platform itself.
Chapter 5: Payload Structures
LD Platform User's Guide, 11970-000 Rev E
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