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TOPIC: RPM laser SpeedOmeter

RPM laser SpeedOmeter 11 months 2 weeks ago #46127

I wanted to show a setup I build for measuring rpm at no load with a cheap china laser rpm meter.

I used a pinion I didn’t need and pressed it into a small disc I made on my lathe.
The laser rpm meter is from Banggood
And I use a charger that has voltage out for running the motor up to 7v

E voila dynatech does approx 21000

Finally able to compare some of the motors I collected.
Also makes it easy to compare forward and reverse rpm to check if timing is zero or set in the right direction.

Also handy to check if rpm of my record player running ok. ;-)
Last Edit: by waterbok.

RPM laser SpeedOmeter 11 months 2 weeks ago #46128

How does the Laser Tachometer work?
Do you have a mark on the flywheel that's detected by the laser?
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RPM laser SpeedOmeter 11 months 2 weeks ago #46129

Awesome Sander. :y: I like that. I have a vintage shinwa trimming board.
Your idea is wonderfull.

RPM laser SpeedOmeter 11 months 2 weeks ago #46130

I had no idea this sort of meter had got so affordable - nice work in putting it together :y: B)

What rpm did you get at 7.2V, i.e. how close was it to the 22k rpm Tamiya claim for the motor?

RPM laser SpeedOmeter 11 months 2 weeks ago #46132

Yep you need a little bit of reflective tape on the rotating part.

Didn’t check the 7.2 should be 22k but can check later

RPM laser SpeedOmeter 11 months 1 week ago #46192

Ok, now that's very cool!! :) :)
Might need to look for one myself for the same reason I have always been curious about some of the vintage motors I have, some just have no info available and it would be good to check the claims on the ones that do.....very cool indeed :y:
From somewhere out in the wilds of central Ontario.
.......you build what you like, I will build what I like........it's all cool......
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