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Topic: what is the max rpm an auduino can read? (Read 1 time) previous topic - next topic

jraskell

The question still remains, what are you doing with the value that requires that kind of resolution?

robtillaart


How about adaptivity?
- if the RPM is high there is less need to know the angle e.g. 8 pulses per rotation is ok?
- if the RPM is low the angle position becomes more important and more pulses are used.

Have not thoughed about how to build that (sort of digital gearbox I guess)
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

Gadget999

the number is used to determine the firing angle of an engines injectors

the engines that rev to 50,000 rpm use carbs so the angle is not important

Mori


Quote

i was recommended 100 pulses per rev by a guy who has been doing this stuff since the 1960's
the number is used to determine the firing angle of an engines injectors


So how did he do this back before Arduino (or micro-controllers, or even computers, for that matter)?


hmm barcodes, atms, apalo 11,  avionics

sry there was some of it at least

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wildbill


The question still remains, what are you doing with the value that requires that kind of resolution?


It's quite hard to offer sensible suggestions without having this answered

robtillaart

Quote
So how did he do this back before Arduino (or micro-controllers, or even computers, for that matter)?


(I assume) Mechanically, it is amazing what is possible with gears - although an "adjust and recompile of a gearbox" can take many days. By adding bigger cogwheels with more teeth, change of transmissions, etc precission is incremented.
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

Gadget999

i found this video some of you may like

120,000 rpm with the arduino !


http://www.element14.com/community/videos/1648

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