An eBay search for "laser tachometer" wil bring up a ton of generic handheld devices for $10 to $30. Most of them look the same.
I was looking through reviews on Amazon for the same thing, and noticed that someone said there that these devices only work well for speeds above 1000rpm.
(Quite a few reviews too from people receiving defective units, so it seems a bit luck of the draw - but that's another issue)
Has anyone here used one of these devices on machine tools, to read down to about 40rpm?
Does it work? Because I'm thinking it would be handy checking spindle/chuck/cutter speeds where I'm too lazy to check what belts I've got on, or the VFD is set off 50Hz.
But it would be useless if its only reliable above 1000rpm.
Ian
I was looking through reviews on Amazon for the same thing, and noticed that someone said there that these devices only work well for speeds above 1000rpm.
(Quite a few reviews too from people receiving defective units, so it seems a bit luck of the draw - but that's another issue)
Has anyone here used one of these devices on machine tools, to read down to about 40rpm?
Does it work? Because I'm thinking it would be handy checking spindle/chuck/cutter speeds where I'm too lazy to check what belts I've got on, or the VFD is set off 50Hz.
But it would be useless if its only reliable above 1000rpm.
Ian
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