Author Topic: What is this called? Clear plastic scale pointer  (Read 1019 times)

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Offline Picktool

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What is this called? Clear plastic scale pointer
« on: November 26, 2017, 04:53 AM »
What do they call these scale indicator things for measuring?
I've tried a few keywords and not getting decent results.
Looking for some with the magnification bubble also.
Know of a decent website with a page loaded with them?

Trying to avoid making one if there is one out ready & willing.

Well Dogey

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Offline Peter Halle

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Re: What is this called? Clear plastic scale pointer
« Reply #1 on: November 26, 2017, 06:51 AM »
I would call that a magnifying cursor.  It might be easiest to find one as a spare part for a table saw.  For instance:  https://sawstop.3dcartstores.com/Fence-Position-Indicator-Lens-for-T-Glide-Fences_p_63.html

Peter
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Offline Picktool

  • Posts: 118
Re: What is this called? Clear plastic scale pointer
« Reply #2 on: November 26, 2017, 11:11 AM »
Thanks Peter,

Hmm... so a Cursor is the name. Just a bit tough
to find them when all you see are computer cursors in
google images.

Didnt think of the tablesaw parts for the magnifying ones. Cool.

Might have to make one after all.

 [blink]
Well Dogey

Offline Michael Kellough

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Re: What is this called? Clear plastic scale pointer
« Reply #3 on: November 26, 2017, 12:31 PM »
I don't find magnifying cursors all that useful. They magnify everything. I prefer finer scribed lines.

My top preference is fine lines and a vernier scale so you can directly position to a fraction of an increment.

Google vernier scale, but the basic formulae is that you make a short scale that is either smaller or larger by one increment than the long reference scale. Then you simply match lines.

My old Paralok table saw fence was my introduction to this method. (The Paralok was designed by an architect)
The rail that the fence slides on has a long scale adhered to it like most systems. On the T bar is a small piece of aluminum with 8 increments on it. (4 to each side of the "0" centerline). The 4 increments span exactly 5/16 of an inch so when the 0 is lined up with an increment on the long scale only the marks on the outermost ends of the vernier scale also align with marks on the long scale. The other marks vary from 1/4 of a sixtenth to 3/4 of a sixtenth. So, moving the fence so the next closest mark lines up with a mark on the long scale means you moved the fence precisely 1/64". Moving the fence only enough so two marks equally stradle a 1/16" increment means you moved the fence 1/128".


Offline ChuckM

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Re: What is this called? Clear plastic scale pointer
« Reply #4 on: November 26, 2017, 12:52 PM »
The sawfence cursor is a rough tool to me. I find the factory cursor (with a magnifying lens or not) more than good enough.

For precision cuts, I don't rely on the cursor or the saw scale/tape. If I want to cut identical stock of 12" width, it doesn't matter whether the saw fence is set at 12" 1/64 strong or weak, as long as all the cuts are done with the same fence setting.

When I need to cut a stock that must fit exactly, say, an opening, I measure the opening with a steel rule or tape and then set the fence using that very same rule or tape, which may or may not give the same measurement as the tape on the saw.
« Last Edit: November 26, 2017, 12:55 PM by ChuckM »

Offline J0hn

  • Posts: 116
Re: What is this called? Clear plastic scale pointer
« Reply #5 on: November 26, 2017, 03:09 PM »
I just added the Wixey digital readout to my table saw - very pleased with the results.  Accurate to 3 decimal points and you can calibrate by either sliding the fence up to the blade or cut a piece of wood, and directly enter the measurements into the unit

https://www.amazon.com/gp/product/B072HFQLBS/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

example pic from their website

Offline Euclid

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Re: What is this called? Clear plastic scale pointer
« Reply #6 on: December 02, 2017, 09:36 AM »
I don't find magnifying cursors all that useful. They magnify everything. I prefer finer scribed lines.
I see your point, Michael, but I thought the primary purpose of that device was not to improve accuracy per se, but make the standard level accuracy available to those with less-than-perfect eyesight.

Offline ChuckM

  • Posts: 268
Re: What is this called? Clear plastic scale pointer
« Reply #7 on: December 02, 2017, 10:06 AM »

I see your point, Michael, but I thought the primary purpose of that device was not to improve accuracy per se, but make the standard level accuracy available to those with less-than-perfect eyesight.

+1

Offline jobsworth

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Re: What is this called? Clear plastic scale pointer
« Reply #8 on: December 02, 2017, 11:50 AM »
I call it a doo hickie or a more technical term a whatchamacallit
Loving the Calif sun....