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MN0090-05 Page 57 of 68 18008
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.
6.3 Limit Ring (Hard Stop) Adjustment
Limit Rings (Hard Stops) are provided to limit the degree of travel in the tilt
path. The pan travel is continuous and the tilt travel can be narrowed from
the maximum of 180° (± 90° from horizon) to a lesser value.
NOTE
Limit Rings are factory set to the maximum allowable travel prior to
delivery. If necessary, set your Limit Rings in your shop to fit your site and
then make any final adjustments after the unit has been installed.
DO NOT EXCEED FACTORY SETTINGS
MAXIMUM TILT MOVEMENT IS ± 90 FROM HORIZON
(180 total travel)
PAN MOVEMENT IS CONTINUOUS
THE UNIT IS FACTORY SET TO THE MAXIMUM TILT TRAVEL
DO NOT ATTEMPT TO SET LIMITS GREATER THAN FACTORY
SETTING OR DAMAGE WILL OCCUR TO THE PAN AND TILT
UNIT!
LIMIT RING ADJUSTMENT MUST ALWAYS BE DONE ON
AN ELECTRONIC STATIC DISCHARGE (ESD) BENCH
WITH ESD TOOLS AND THE TECHNICIAN MUST USE A
GROUNDING STRAP SO AS NOT TO DAMAGE THE
CIRCUIT BOARD.
Remove the sixteen (16) cover mounting screws and washers and the
Rear Access Cover. Retain screws and washers for reinstallation.
Refer to section 3.1.1.1 to move Main Controller PCB. Moving the PCB
will allow access to the trip rings for adjustment. Please take care to not
touch the board with a screwdriver or other tool.
Use a flat blade screwdriver to adjust the red (UP) and blue (DOWN) limit
rings. See Figure 14 below.
You may need to run the unit to determine the exact positioner of the
modified limit adjustment. MAKE SURE YOU DO NOT ALLOW THE
TABLE TOP TO GET NEAR THE PCB WHEN MAKING THIS
ADJUSTMENT.
Repeat for azimuth as necessary if so equipped. See Figure 15 below.
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