Programming to Display RPM on a LCD

VEX V5 General Discussion
#1

Hi
I have a robot with a single flywheel with 25:1, I am new to programming & I use easyC
I have made a program for the optical shaft encoder to display how many ticks have been counted but I need it to display the amount of revolutions that have been made when it is running.

#2

Lets look at what we know.
RPMs are a measurement over time and an OSE ticks 360 times per revolution so we to start a timer, wait for a little bit while counting the ticks, then measure the ticks compared to the timer.

For example: If we count 18 ticks in 50 ms. (1000 / 50 [ms to seconds]) x (18[ticks]) x (60/360 [seconds per tick]) gives us 59.76 RPM.

If my math is right then the following code should work for you.

#3

Can you post the global variables and local variables used for this code.

Thank you so much the code

#4

Encoder and timer variables are long the rest are int. All are local variables.

I am away from a pc and can’t send a pic.

#5

What is the x=1+2 function called

#6

assignment

#7

so do I need to switch the rpm and distance variables too?

#8

So would I tell it to display motspd:%d

#9

Yep.


SetLCDText(1,1,"MOTspeed: %d", rpm)
#10

Hey.
Do you mind reposting the code?
It says the image failed to load.

#11