[chbot] Controlling a pan and tilt head using AMX

[Mark Atherton]

Thanks Charles,

Yes, decoding the output is top of the list.

If I hadn't asked, I know that someone would pop up in 3 months time and 
say that they had full documentation etc (sods law etc.)

Don't particularly want to redesign the hardware, but that is always an 
option.

-mark


On 14/05/2017 1:52 PM, Charles Manning wrote:
> 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 
> <mailto: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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