Motor by PWM control

I need to run an engine control (NEMA 17) for a number of steps with maximum possible speed controlled using myRIO. When I used Digital out to produce the wave square for the stepper, the maximum speed obtained was 500 meters per second when I used 1 ms in high, then low 1ms and so on in a loop. But when I use PWM to route the signal, higher frequency was obtained, but there is no way to count the number of steps. Is it possible to get more speed and be able to count impulses? or get a better resolution for wait function?

Hello justmearun,

try to use the palette of RT timing functions there is the possibility to use µS instead of Ms. programming of the FPGA is also an option to implement this functionality.

Be careful, if the frequency is high, the engine do not spin, because that exploitation of couple. A solution for this is to start with a frequency more bass and this increase until necessary.

Tags: NI Software

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