With the pole control box 4 functions are commanded:
- shutter release [S]
- tilt                   [T]
- video
- zoom              [Z]
The control box needs to be linked to the dispatching box on the cradle. It could be done by radio control. I have preferred a cable link. The control box also supports the viewer and it contains the battery to feed all.
The control box is set on the pole itself such that the pole bearer can watch in the viewer.
For shutter release of the Ricoh GX100 the switch of the remote control device is connected to the control box
Shutter release
The shutter release depends on the camera.. On most of my cameras it is triggered directly on the camera, otherwise there is a module specific to the camera.
A push button on the control box is connected to the command on the cradle, whatever is the camera.
This needs two wires. It is possible to use the shield of the cable as one wire.
The tilt is a direct feeding to the servo. There is a double toggle switch on-off-on which power the servo with direct current, the polarity is inverted by the toggle switch. The figure shows the switch as off . When contact is done either way, the motor runs clockwise or counterclockwise.
This needs only two wires.
The video output of the camera is linked to the viewer. The viewer is recovered from an out of order video camera. More details on this page: camcorder viewer.
This needs two wires. It is possible to use the shield of the cable as the ground wire.
It is the most tricky to install. On an old Vivitar digital camera I managed to control the zoom with direct electric connections on the camera. However, there was no step zoom. Now I have to get it done with a servo-motor. For this, a servo controller is set in the control box. There are two push button, one stepping up and the other stepping down. See this page for more details on the servo of zoom.
This needs three wires.
The cable connecting the control box to the cradle is running through the pole. At the top section, it must go through a 8mm diameter. It must also have enough lines for all functions. It shall be as thin and light as possible. On my previous cradles it is 4 wires plus shield.  Now with the zoom being added, it is 8 wires plus shied. This one is also heavier.
The trick is to have a connector that can run through the Ø8mm pipe.
The only way have been to design it myself with 2.54mm pin header. This is the cable connector before it is coated with compound paste. Next is the male plug


  Cable wiring
The connector of the cable on the pole control box is a DIN 45329 (7-pin). This is because I could not find a   DIN 45326 (8-pin)
1 = shutter release
2 = ground shutter release and video
3 = video signal
4 = tilt
5 = tilt
6 = zoom code
7  = zoom plus
8 = zoom minus