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MPT-90 PRODUCT MANUAL
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3.1.8
Camera Lens Accommodations
Left
Pins
Signal Name
Description
Signal Name
Right
Pins
20
Zoom + (Cam1)
PWM motor drive pair
designed for Zoom Lens Drive
Zoom + (Cam 2)
20
41
Zoom – (Cam 1)
Zoom – (Cam 2)
41
21
Focus + (Cam 1)
PWM motor drive pair
designed for Focus Lens Drive
Focus + (Cam 2)
21
43
Focus – (Cam 1)
Focus – (Cam 2)
43
22
Z/F +3VDC
V source for position feedback
Z/F +3 VDC
22
44
Z/F ground
Return for position feedback
Z/F ground
44
23
Z Position Sense (Cam 1) Connect to Z position pot wiper
Z Position Sense (Cam 2)
23
44
F Position Sense (Cam 1)
Connect to F position pot wiper
F Position Sense (Cam 2)
44
The positioner controller provides four proportionally controlled, bi-directional PWM
motor drivers suited to drive camera lenses with motorized zoom and focus. Most
of these style lenses also have potentiometers incorporated to provide a relative
sensing of the Z & F position. Use of the Z & F motor drivers with the potentiometer
position feedback to allow stored presets that encompass Az, El, Z & F for easy
camera integration.
Zoom motors should be connected to the Zoom + & Zoom - pins, while Focus
motors should be connected to the Focus + & Focus
– pins. Position feedback
potentiometers are typically used as voltage dividers, with the supply voltage (Z/F
+3VDC & Z/F ground) connected across the two potentiometers. The
potentiometers wipers should be connected to the Zoom Position Sense and Focus
Position Sense respectfully.
