Let''s Talk Solid State Relays! (was: Newbie Advice/Solenoid Sequencing)
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--- In basicstamps@y..., iceninevt@y... wrote:
Hi ya Rich,
> If it was me, I would use some big solid state relays. They are
> pricey, but they could interface directly with the stamp, and are
> easy to replace.
I am unfamilair with solid state relays. I've got a bunch of catalogues
here, Jameco, Radioshack, Mouser, Digitech...and after taking a look
they do appear rather intriging devices...and pricey to boot!
If anyone has a more intimate knowledge of these units I'm all ears
[noparse][[/noparse]you can also e-mail me @redirect@e... if you feel it is
getting too far off topic].
The SS relays appear too expensive for my budget BUT (!), in my initial
rough and dirty thumbnail plans (which is still all I have to work with
I need to evolve this area also), the Stamp is interfaced with a bank
of (6) low powered DC relays connected to another bank of (6) 120VAC
rated High Power relays plus all the attendant sockets, and misc.
components. Perhaps an SS relay exists that can switch 6 seperate loads
and it could end up being cheaper than the dual bank of hi/low relays
(total of 12 in all!). Just the 6 high power relays alone w/sockets
will cost $50.
> Let me know how you make out with this project, it is very
> interesting. I did not know a solenoid could be held by being
> intermittantly pulsed (after being completely energised, as you said)
Humm. Perhaps there is still some misunderstanding or maybe I haven't
expressed myself clearly enough. The solenoids will not be used for
their 'holding' power, but rather for their 'push' 'impact' force.
Percussive 'banging' type impact is what I need out of them. So they
only need to be loaded long enough to move the core to full stroke, and
then the uncharged core will fall back down due to gravity ready to be
loaded at the next cycle.
I think you are right that in order for a solenoid to reman in a 'hold'
charged position, it would need a constant current (or a crazy fast
pulse). Actually, although it doesn't relate to my needs, it is an
interesting question and I haven't a clue [noparse]:)[/noparse]
But I'm learning hour by hour!
Thanks.
Cheers,
-Neal
Hi ya Rich,
> If it was me, I would use some big solid state relays. They are
> pricey, but they could interface directly with the stamp, and are
> easy to replace.
I am unfamilair with solid state relays. I've got a bunch of catalogues
here, Jameco, Radioshack, Mouser, Digitech...and after taking a look
they do appear rather intriging devices...and pricey to boot!
If anyone has a more intimate knowledge of these units I'm all ears
[noparse][[/noparse]you can also e-mail me @redirect@e... if you feel it is
getting too far off topic].
The SS relays appear too expensive for my budget BUT (!), in my initial
rough and dirty thumbnail plans (which is still all I have to work with
I need to evolve this area also), the Stamp is interfaced with a bank
of (6) low powered DC relays connected to another bank of (6) 120VAC
rated High Power relays plus all the attendant sockets, and misc.
components. Perhaps an SS relay exists that can switch 6 seperate loads
and it could end up being cheaper than the dual bank of hi/low relays
(total of 12 in all!). Just the 6 high power relays alone w/sockets
will cost $50.
> Let me know how you make out with this project, it is very
> interesting. I did not know a solenoid could be held by being
> intermittantly pulsed (after being completely energised, as you said)
Humm. Perhaps there is still some misunderstanding or maybe I haven't
expressed myself clearly enough. The solenoids will not be used for
their 'holding' power, but rather for their 'push' 'impact' force.
Percussive 'banging' type impact is what I need out of them. So they
only need to be loaded long enough to move the core to full stroke, and
then the uncharged core will fall back down due to gravity ready to be
loaded at the next cycle.
I think you are right that in order for a solenoid to reman in a 'hold'
charged position, it would need a constant current (or a crazy fast
pulse). Actually, although it doesn't relate to my needs, it is an
interesting question and I haven't a clue [noparse]:)[/noparse]
But I'm learning hour by hour!
Thanks.
Cheers,
-Neal