[chbot] Controlling a pan and tilt head using AMX

Charles Manning cdhmanning at gmail.com
Sun May 14 02:52:48 BST 2017


Mark

First you need to decode the serial. You might then find it is some
semi-standard protocol such as DMX (used for stage/studio lighting control).

If you're just after the mechanical stuff and don't need to keep it
pristine, you might consider fitting a new micro and writing your own
firmware.




On Sun, May 14, 2017 at 12:38 PM, Mark Atherton <markaren1 at xtra.co.nz>
wrote:

> Hello everyone,
>
> Chocolate fish time...
>
> Just playing with a Fujinon CPT-1A-10DA pan and tilt head, these units are
> used in the broadcast TV arena. It may use the same protocol as the EPT-5E
> series.
>
> Very little documentation supplied with the product, although appear to
> have confirmed that the unit is controlled using RS232.
>
> The manual for a suitable PSU was supplied, so managed to identify power
> and RS232 lines. Dismantled the unit to confirm that RS232 feeds pin 13 of
> a MAX232 (R1IN).
>
> After moving the pan channel (by hand) with power removed, the unit
> returns to previous position when 12V is applied; am assuming that the unit
> works OK.
>
> This unit was originally configured by BCL (now Kordia ?).
>
> Managed to find a suitable controller (EOP-102J-30E) on eBay for US$1100;
> would like to borrow it to do some comms sniffing but that seems unlikely.
>
> Finally, spotted that the unit sends a short message from it's RS232 port
> at power on. Looks like data cells are 200us wide, so maybe a 4800baud
> comms channel. Need to explore this more.
>
> Have found all manner of P&T protocols, some require an address field
> (RS485, or RS232) so that adds a further level of uncertainty/excitement to
> the proceedings.
>
> If anyone has experience with such devices, or know where correct
> documentation might be acquired, I will be most happy to hear from them.
>
> This is not a commercial project, and hair is being pulled out by the
> clump ...
>
> Regards, Mark
>
>
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