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RPM trouble

Posted: Thu Mar 04, 2021 7:26 pm
by many
HI!
I have a problem with my RPM showing wrong above 1300rpm. My motor is a C90 and I have set 1 pulses per revolution on both RPM1 and RPM2 which are connected to separate magnets. Above 1300 rpm it starts to show far too high RPM. Is this because it does not receive pure signals or what?