- Wed Jan 20, 2021 12:17 am
#47738
I am trying to make sense of the Crank based RPM output (RPM1).
Using the simulator board as a plug in to generate RPM and using Tunerstudio as the monitor.
Looking with a scope at 1,000 rpm the square wave has a frequency of around 1.6milliseconds (it jitters a bit)
At 10,000 rpm it is around 170 micro seconds (0.17 ms).
But....unless I have my maths wrongs I think...
1,000 rpm = 16.66hz = 60ms duty cycle
10,000 rpm = 166.6 hz = 6ms duty cycle
Both are roughly a factor of 10 different which is correct but the numbers look wrong on the scope?
What am I missing?
What else affects the RPM output signal?
Using the simulator board as a plug in to generate RPM and using Tunerstudio as the monitor.
Looking with a scope at 1,000 rpm the square wave has a frequency of around 1.6milliseconds (it jitters a bit)
At 10,000 rpm it is around 170 micro seconds (0.17 ms).
But....unless I have my maths wrongs I think...
1,000 rpm = 16.66hz = 60ms duty cycle
10,000 rpm = 166.6 hz = 6ms duty cycle
Both are roughly a factor of 10 different which is correct but the numbers look wrong on the scope?
What am I missing?
What else affects the RPM output signal?