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- From: gph@hpcc01.corp.hp.com (G. Paul Houtz)
- Date: Sat, 23 Jan 1993 14:45:36 GMT
- Subject: Re: Table Saw Experiences
- Message-ID: <4320156@hpcc01.corp.hp.com>
- Organization: the HP Corporate notes server
- Path: sparky!uunet!usc!sdd.hp.com!hpscit.sc.hp.com!hplextra!hpcc05!hpcc01!gph
- Newsgroups: rec.woodworking
- References: <1993Jan13.224536.7933@hpcvusn.cv.hp.com>
- Lines: 42
-
- Steve Bellovin writes:
- >
- >In article <4320147@hpcc01.corp.hp.com>, gph@hpcc01.corp.hp.com (G. Paul Houtz) writes:
- >> The magnetic switch is not the solution for your problem, Steve.
- >>
- >> You problem is the location of the switch, not the way it functions.
- >>
- >> You can reposition your switch on the contractor's saw much easier
- >> and cheaper than buying a magnetic switch for ~$80.00.
- >>
- >> The magnetic switch has two momentary switches that trigger a
- >> magnetic relay. The power flowing through the saw keeps the switch
- >> open. Any break in the circuit shuts off the saw AND the relay.
- >> The break can come from the "momentary off" button on the switch,
- >> or from unplugging the saw (or from a power failure, or overload
- >> protection circuit, etc.).
- >
- >I understand how it works. My previous posting was a bit too brief; let
- >me explain a bit more.
- >
- >I think I saw the idea in FWW, though it could have been elsewhere. You
- >hang a board (say, 8x8, or whatever fits) in front of the magnetic switch,
- >with a cut-out in front of the ``ON'' button. To turn the saw on, you
- >stick your finger through the hole, to reach the button. But to turn it
- >off, just bang *anywhere* on the board. The point is that turning off
- >the saw becomes a simple operation -- there's a large surface to aim for,
- >and a very non-critical direction vector. I don't care where a toggle
- >switch is; it's a small target, and you have to press it in just the right
- >direction.
- >----------
- Again, I feel the need to point out that a magnetic switch is not
- necessary for this. I have a mechanical switch on my jointer that
- is not magnetic, but has a startand stop button just like a magnetic
- switch, and could be set up exactly as you describe here.
-
- There is a whole world of mechanical switches in hundreds of different
- configurations, and most of them are under $5.00 each. The mechanical
- start-stop switch on my jointer could easily be purchased through an
- electrical supply specialty shop for under $20.00.
-
- Unless you need the relay operation of the magnetic switch, it is hard
- to see why you should pay $70 - $100 for one.
-