How do I read the feedback signal from a brushless peristaltic pump using an Arduino

Other Hardware Motors, Mechanics, Power and CNC
21

Hi, @1cecream

Can you please post a copy of your circuit, a picture of a hand drawn circuit in jpg, png?
Hand drawn and photographed is perfectly acceptable.
Please include ALL hardware, power supplies, component names and pin labels.

Thanks... Tom.. :grinning: :+1: :coffee: :australia:

22

Like you said, the flow rate graph indicates that those numbers are unrealistic, assuming that it's 1 pulse at every turn. However, if you take a look at this video: https://www.youtube.com/watch?v=URPIO19vH0M, if you cue the video towards the end, this person is getting a similar pulse count as I am. However, he assumes that the pulse per revolution is 663. Is that a realistic number? Do you think it would make sense to attach some sort of indicator/marker on the tip of the motor and manually count the average RPM of the motor, and then derive a pulse per revolution constant from that?

23

Your eyes won’t be fast enough if it spins at more than 2 or 3 round per second. The spec gives you the volume pushed for a given RPM and it seems very linear so I would rather measure how long it takes to empty a known quantity of liquid and infer the RPM from that

24

Ok I'll try doing that.

25

I just realized that I don't have the right size tubes for the peristaltic pump, so I am unable to try out your solution at the moment. I'll purchase some and then try out your recommendation after they have arrived, which should take around a few weeks. I'll report back to you here. Thanks for all your help thus far

26

OK no worries

27

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