Convert Encoder counter value to RPM

[kevlenahan11]

Hi,

I have a NI myRIO and an encoder which is being turned by a separate motor. I am looking to convert the counter value to to revolutions per minute. The Encoder has 5000 pulses per revolutions

I have attached a photo of the current block diagram below.

Thanks in advance.

[GerdW]

Hi kev,

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@kevlenahan11 wrote:

I have a NI myRIO and an encoder which is being turned by a separate motor. I am looking to convert the counter value to to revolutions per minute. The Encoder has 5000 pulses per revolutions

I have attached a photo of the current block diagram below.

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So what is the exact problem? Which result do you get - and what do you expect?

Most often rotation speed is calculated by

speed = (encoder_current - encoder_previous)/pulses_per_rev/time_interval

Right now you know "encoder_current" and "pulses_per_rev". You also need to know "encoder_previous" and "time_interval"…

[kevlenahan11]

Hi,

I currently have the total revolutions of the motor over a time manually specified. I am looking for the current speed (RPM) of the motor. How would I get encoder_previous and time_interval?

Thanks.

[GerdW]

Hi kev,

to get data from previous iterations you need to use shift registers - as you should have learned from taking the "Training resources" offered in the header of the LabVIEW board!

"encoder_previous" is the encoder value from previous iteration, time_interval is the difference between current time and previous time…