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Determining Weapon RPM - (400rpm)


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marto
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Joined: 08 Jul 2004
Posts: 5459
Location: Brisbane, QLD


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Determining Weapon RPM - (400rpm)

I have been thinking a bit about how to safely and relatively accurately determine weapon RPMs. Now I have a few tachs about integrated into my data loggers however most people done.

What most people do have is a smartphone most are capable of 60fps, 120fps or even 240fps (iPhone 6) video. I just tested it on my iPhone 6 and 240fps is plenty fast enough to catch the 6.67 rev/second of 400rpm. That is 36 full frames for one revolution.

I hopefully will get a chance to do up video tutorial tonight but it means if I need to test and 400rpm sportsman bots I will just throw them in the arena spin em up and take a short video.

Steve
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Post Tue Sep 29, 2015 9:37 am 
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kato



Joined: 11 Dec 2010
Posts: 92
Location: 4505


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Strobily Free for smartphones. I use it at work for timing rotating machinery. It has strobe and tacho modes which both can be used to see whether a spinning weapon exceeds an RPM threshold, can measure the speed of a weapon for tweaking it to the correct speed.

Post Tue Sep 29, 2015 10:43 am 
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miles&Jules
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Joined: 19 May 2010
Posts: 3970
Location: ipswich QLD


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Also if you re using a slow-motion camera or phone to check rpm ..you can set up a regular wall clock next to it to check how many rpmā€¦there is a bit of counting involved.

about to try that app kato. Very Happy
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Post Tue Sep 29, 2015 2:49 pm 
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0xFFFF



Joined: 17 Sep 2015
Posts: 18
Location: SE Victoria


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Strobily is awesome! Thanks for the link.
When I installed Strobily, I also installed Magnetic Counter.

Post Tue Sep 29, 2015 4:24 pm 
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