ra90 - actuator pin sticking?

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Fri Apr 16 17:24:36 2004

>
>
> I should probably search the archive, but has anyone experience with RA90's?
>
> I got one recently and when I powered it up (after a thorough cleaning)
> it faulted with E9.
>
> I have (thankfully) several manuals for this device and it seems to
> indicate the solenoid which "pulls the pin" on what looks like the voice
> coil head motion thing may be sticking. "head motion thing" - that's a

Have you checked to see if the solenoid winding is continuous? Have you
checked what voltage/current it's getting?

Solenoids take a lot more current to pull-in than to hold. A lot of the
time, a higher voltage is applied initially to get them to pull in, then
a lower voltage is switched in to hold the core. This reduces power
consumption/dissipation. If this arrangement fails, it can appear to be
mechanical sticking, in that if the core is moved by hand it will hold in.

-tony
Received on Fri Apr 16 2004 - 17:24:36 BST