Adjustment Of The Potentiometer For Pth310P / Pth311P Preset Pan & Tilt Motor - Videotec PTH310 Manuel D'instructions

Adjustment of the potentiometer for PTH310P / PTH311P preset pan & tilt motor
This operation is very important for the correct working of the preset.
PTH310 / PTH311 Pan & Tilt motors are still set in our works, therefore this procedure is to be made only in case of
real necessity.
The following procedure has to be followed both for the potentiometer connected with the horizontal movement and for
the one connected with the vertical movement.
1. Disconnect the pan & tilt motor supply
2. Adjust the cams by means of a screwdriver
until their position is symmetric compared to
the end of stroke
3. Loosen the two fixing screws of the
potentiometer holder bar
4. Release the pinion from the gear
5. Place an Ohmmeter between the Vcc and Tilt
clamps of the terminal strip J4 and turn the
potentiometer shaft, which is connected to
the vertical movement, till reading the value
of about 1875 Ohm.
6. Replace the potentiometer gear
7. Lock the two fixing screws of the
potentiometer holder bar
8. Repeat the same operation for the horizontal
movement till reading the value between Vcc
and Pan.
Pag. 5 PTH310 / PTH311 3201