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Old November 24th, 2017, 10:58 AM   #1
L D[AR2,P#0.0]
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L D[AR2,P#0.0] is offline
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Anyone used/heard of a shadow protractor?

As title - anyone know what these are used for?
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Old November 24th, 2017, 05:15 PM   #2
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In this day and age? Doorstops.
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Old November 25th, 2017, 01:25 AM   #3

sigmadelta is offline
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Looks like an angle measurement device. It most likely has a potentiometer for a voltage/current output (to analogue input on a PLC), and the limit switches are for the "software limits", with the black stoppers as "hardware limits".
Freelance Automation Programmer
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Old November 25th, 2017, 01:35 AM   #4
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Taking me back to my apprenticeship where I used an Abacus - er - slide rule. And then a HP calculator that was inaccurate.
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