RE: [CAD_CAM_EDM_DRO] Re: CNC interface PCB

Hi Dale -

Thanks for the info. I've been getting good help on the relays,
but now I'm especially looking for info like you offered about
switching 23A with PCB-mounted relays. Is that 23A being carried
directly by the PCB traces? According to the chart I downloaded,
with a 20deg C rise and 2oz copper, that would require about .350"
wide traces. Does this sound familiar?

TIA,

Carlos Guillermo
VERVE Engineering & Design

-----Original Message-----
From: aspaguy [mailto:spaguy@...]
Sent: Monday, February 11, 2002 11:10 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: CNC interface PCB

Carlos,
When I'm not playing with cnc stuff I support the habit with my
spa
repair company.(Hence the A-spa-guy handle) While this may seem to
be
a bit off topic, it may come into play here. newer hot tubs
routinely
use pc boards and pc board mounted relays to handle 220 volt AC
5.5kw
heat elements.(they generally amp out at about 23-24 depending on
actual supply voltage). I did a little checking and the relays can
be
purchased through spa parts plus (800-521-7587) I can get them
from
some other distributors too but these guys have a great tech
support
that could help you with coil voltages etc. as this info is kinda
sketchy in their catalog. Also, I believe SPP will talk to the
general public, where many others won't if your not in the
business.
Normally I like that, but in your case SPP may be the ticket.
Happy Hunting
Dale


--- In CAD_CAM_EDM_DRO@y..., "Carlos Guillermo"
<carlos@v...> wrote:

> Hi All -
>
> I'm working on a custom interface board for my controller, and I
> have some questions regarding power capacity of PCB traces. I
> would like to use an isolated corner of the PCB for some relays
> for energizing external devices (coolant pump, air cylinders,
> etc.) as well as possibly cutting power to the Gecko's under
> estop. ....................