"Leonard J. Reder" wrote:
> Hi,
>
> A colleague is looking into using a picomotors for optical alignment.
> We are interested in knowing if anyone has developed EPICS device
> support
> for the GreenSpring IP-488 industry pack module and the New Focus
> 8732 multi-axis pico motor controller. The New Focus controller is
> a GPIB device and special commands are required to be sent to the
> picomotors for positioning.
>
> Also just support for the IP-488 module would be useful. Also have
> any of you had particularly bad experience with the Greenspring IP-488
> module. I would be interested in knowing about potential problems
> with utilizing GPIB.
>
> Any and all replies are greatly appreciated.
>
I have written GPIB device support for the 8732 picomotor driver
using the IP-488 interface. We have used it successfully for the past
2 years to control >20 motors, most of which are moved quite frequently
when
running beam. The only problems experienced were an occasional "runaway"
picomotor (keeps going even though you only command a few steps)
and conflict with OMS driven steppermotors (solved by putting them on
a separate ioc). Fixes were made by New Focus for the runaway
problem; it now seems to be confined to one particular channel,
so this may be simply a bad hardware channel. We switched
channels, but haven't had enough experience yet to know if this
solves the problem.
-Al Grippo
--------------------------------------------------
Al Grippo/ Computer Scientist/ TJNAF
Newport News, VA/ 757-269-5015/ [email protected]
--------------------------------------------------
- References:
- EPICS collaboration meeting Noboru Yamamoto
- GreenSpring IP488 Industry Pack Support and New Focus 8732 Controller Leonard J. Reder
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