Controlling motorized zoom lens

Hi *,

I have searched through the forum for a similar topic however have not found any; still, apologies if this has already been discussed before.

We have a motorized zoom lens (fujinon-d12x8a-se2). We'd like to be able to control the zoom and focus (and iris if appropriate--I'm looking into this).

From looking at the wiring diagram (there is a PDF on the link above) it seems to require direct voltage. And depending on whether it is 12V or 6V 'ind.' and 'com' (any ideas what these are?). So, my plan is that one could send signals to the arduino to adjust the zoom and focus.

Furthermore, these signals will depend on another programme (either Java or C, probably C). So, somehow I would need to get some data from this C programme, to an arduino board, which can then in turn send signals to the motorized lens.

This seems a tall order, although I am sure it must be possible.

Any suggestions/starting points?

Many thanks,
James

First figure out how you can control the lens, the circuit and the protocol. If you have that done, the rest is pretty simple and can done with most microcontroller or external USB contacts.

From the data-sheet here, I guess IND means independent and COM means combined for zoom and focus. COM seems to work with +- 6 or 12V to move in or out, IND only with +6 or 12 V but on 4 pins instead of 2. To drive that, I would start out in IND mode with 6V where you then have to supply either zoom out (orange) or in (yellow) and focus near (blue) or far (green). You should be able to drive those things with TTL levels.

If you have a working setup with that lens, measure what really happens on those lines.

Korman

Apologies for the late reply; holidays and all.

Many thanks for your suggestions ... I shall have a look at driving it and seeing what I can figure out, and get back to you for more help if needed.

Thanks again,
James

It appears that in the "IND" mode, you simply have access to three DC motors.

I'm not so sure that is correct. The data sheet wiring diagram is not great in the part about having an internal "noise filter unit". It could be the ind and voltage switches only have to do with the noise filter and not the voom and focus motors.

Incomplete information makes for higher amount of guessing factor. :wink:

Lefty

Of course you may be right. A quick ohm meter check should be able to determine if the motor leads become commoned in IND mode but seperate in COM mode.

Lefty

Many thanks for your help everyone.

I have got hold of some wires and a DC power supply.

I am in IND and 6V mode. If I supply current across 3 and 4, the zoom lens moves in either direction and if I supply current across 5 and 6 the focus works as well. So, any ideas on what 1 and 2 would do?

Going ahead to think about controlling this from an Arduino board. What are your thoughts on using a Motor shield. Perhaps http://www.skpang.co.uk/catalog/product_info.php?cPath=140_142&products_id=477 or http://www.oomlout.co.uk/motor-shield-for-arduino-kit-p-207.html?zenid=64b26be23cf14731ae283add2d07b57c Anyone used these? Would they work? I am thinking that I could just plug in 3 and 4 for one motor, and 5 and 6 for the other. I would then have my dc power supply at 6V 0.02A pluggin into Vin.

Cheers,
James