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MPT-90 PRODUCT MANUAL This document contains U.S. export controlled technical data as regulated by the U.S. Export Administration Regulations 15 CFR Parts 730-774, export, disclosure or transfer contrary to U.S. law is prohibited.
2.6 Limits
Elevation range of motion may be limited in all models both electronically and
mechanically. Additionally, non-continuous rotation models have limit settings
for the azimuth range of motion. “Soft Limits” are software settable, and are
primary method used to limit motion. The P&T units are shipped with the soft
limits set at the maximum range of motion, although the range of motion may
be limited by using the included software. Soft limits should always be set a
minimum of 0.2° beyond any position to be stored as a preset position; the
user should not set a preset position on a soft limit. Please refer to the
MN00307 Moog PTZ Controller Software Manual for instructions on how to
set the soft limits.
Mechanical switches to limit travel (“hard limits”) are provided on the elevation
for continuous rotation models, and on both axis of motion for non-continuous
models. These consist of plastic, moveable, color coded “trip rings” that
trigger a microswitch that tells the microcontroller to stop motion in that
direction, while allowing reverse motion. These should be considered a
secondary method of limiting motion, as there are software limits (“soft limit”)
provided as well. The default setting for the hard limits is slightly beyond the
default soft limit setting at the maximum range of normal motion for the
positioner and the user should not attempt to increase the range of motion
without consultation with the factory. Additionally, it is recommended that hard
limits should always be set at minimum 2° beyond the soft limits. It is not
necessary for the user to adjust the hard limit settings unless they wish to
provide a secondary, redundant method of assuring the unit not travel beyond
the soft limits.
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