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Relation between STEP Input Frequency and Current Chopping in various modes of Stepper Motor Operation

Question asked by Siva Murugesan on Jul 23, 2015
Latest reply on Sep 1, 2015 by Siva Murugesan

I am a newbie to Stepper Motors. I am working on L9942. The different modes that it can chop the current are Full mode, 1/2, 1/4 and 1/8.  When 1/4, 1/8 modes are used with lower STEP Frequency or when Full and 1/2 modes are used with Higher STEP Frequency , there is no current chopping at the output for coils. What is the reason behind it?

My aplication is to control position of the Stepper Motor with a stipulated time. The time is large and the steps to be taken is less in requirement. So I need to drive at very low frequency which I am not able to.

Also is there any other way to control using the same L9942?

Please help me out.

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