Re: [CAD_CAM_EDM_DRO] limit switches

I also use inductive proximity sensors as they are non contact and work very
well with our breakout boards. The breakout boards have an optical isolator
on the input and help to eliminate any noise. I buy my proximity sensors
from Automation direct.

Robert Colin Campbell
Bob Campbell Designs
www.Campbelldesigns.com
Mach 2/3 breakout boards
Relay boards
Spindle Speed boards
Stepper motors
Plasma Torch Height control

----- Original Message -----
From: "Paul Kelly" <tech@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, October 10, 2006 8:57 PM
Subject: RE: [CAD_CAM_EDM_DRO] limit switches


>I use inductive proximity probes (<US$12 on ebay) they work very well, are
> non contact, sealed, and have no moving parts.
> PK
>
>
> _____
>
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Jon Elson
> Sent: Wednesday, 11 October 2006 9:24 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] limit switches
>
>
>
> Mike Fredricks wrote:
>
>> Anyone have a source for some good limit switches that are reasonably
> priced. I've been having problems with the 2 types of micro switches that
> I've had so far. I run them normally closed and vibration from the machine
> intermittently bumps them open and faults my geckos and wrecks my part.
> I've
> been just running with the switches disconnected and all works well. I
> found
> that if I wrap the machine with a screwdriver handle near the switches
> this
> creates the fault a lot of the time.
>>
>>
> You may have oil in the switches. The basic plastic switch body is not
> sealed, and
> oil can creep inside and damage them over time.
>
> I got some great MicroSwitch sealed units from
> http://www.cpisurpl <http://www.cpisurplus.com/> us.com/ , but they
> certainly are
> not suitable for a Taig or minimill. There probably are some units made
> for the smaller
> machines, if that's what you have. CPI has a constantly changing stock
> of these sorts
> of parts, and you should ask if you don't see what you want. I'm
> guessing they have a
> warehouse full of junked production machinery and it's sort of like an
> industrial
> junkyard.
>
> These switches run $60 and up new, I got mine for under $5 each!
>
> Jon
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
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