sonic/laser measure

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Subject Author Date
sonic/laser measure Emimec 04-02-2008
Posted by rsss on April 3, 2008, 3:06 pm
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Emimec Wrote:
> Many thanks, another great idea bites the dust then !!!
> Seems I'll need to get a bigger magnifying glass !!!
> Bob

While it might not immediately spring to mind, if you have a computer
in your workshop. then a simple camera focused on the ruler might do the
trick.

You could then make the image as large as the resolution will allow.

Once you have done that, then there are other uses too. Mount it on an
arbor and you can centre up the chuck of lathe or mill. Insert software
graticles and find the centre of holes and rotary tables, line up
workpieces and even use it as a quick clocking device.

(one of these days I must try it, but I am still confused by the
technical complexity of a hammer.)


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Posted by on April 3, 2008, 5:21 am
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 How about one of these cheap digital vernier gauges? Suitable mounted this
will
give very accurate readouts and they are cheap, I've seen them under a
tenner.

The limit with sonic or laser gauges is the wavelength.

MH

Posted by John Montrose on April 3, 2008, 2:52 pm
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On Wed, 2 Apr 2008 22:23:44 +0100, "Emimec"

>I cut many varying lengths, to a bar stop, on a chop saw. I was wondering if
>a sonic or laser measure with some sort of digital readout could be
>incorporated in the bar stop to give a quick and accurate distance measure
>from the blade

As well as the other responses, consider this: the sonic or laser will
reflect off the blade itself. The carbide tips that do the cutting are
slightly wider than this.

You may also need to take into account the total thickness of the
blade depending on if you are cutting a short bit off a long bit or a
long bit off a short bit.


Posted by Wayne Weedon on April 3, 2008, 4:04 pm
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John Montrose wrote:

> As well as the other responses, consider this: the sonic or laser will
> reflect off the blade itself. The carbide tips that do the cutting are
> slightly wider than this.


I believe Bob is talking about a MEC style cold cutoff saw. They use
HSS blades normally 2mm thick.


Wayne....

Posted by Emimec on April 3, 2008, 4:54 pm
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> John Montrose wrote:
>
>> As well as the other responses, consider this: the sonic or laser will
>> reflect off the blade itself. The carbide tips that do the cutting are
>> slightly wider than this.
>
>
> I believe Bob is talking about a MEC style cold cutoff saw. They use HSS
> blades normally 2mm thick.
>
>
> Wayne....

Yes, your right, it is a MEC saw. I measure from the right of the blade, so
blade thickness not a problem, and it is HSS.
Some very interesting replies here worthy of me doing some research.
I like the look of the extending wire idea.
My saw has to the right of the blade a 2 metre long material support table,
with an upright length that the stop block slides along, so the other
suggestion of a stick on type of glass scale that a DRO head could pick up
on is also worth exploring. I have a German made 2 metre rule in use for
setting the stop block. This with the magnifying glass is ok, but if you
look slightly to one side of the stop block, its easy to go undersize when
measuring steel lengths that final size with half a mill in the total. This
then wastes that length, and has to be used on the next order that is
shorter. Lengths up to one metre are set with my 1 metre vernier, and the
magnifying glass !!!!
Bob




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