Re: [CAD_CAM_EDM_DRO] Help in understanding Microstep table

Joaquim Boavida wrote:

>Hi, all
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>
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>I'm trying to develop a step motor controller using trinamic chips.
>
>(www.trinamic.com <http://www.trinamic.com/> ).
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>So far I understood everything, but I have a doubt about a microstep table.
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>Source example is here ->
>http://www.trinamic.com/tmcweb/downloads/tmc236_example_MD.c
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>
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>This chip as a 4 bit DAC, thus a 16 micro step resolution. So, why is the
>table 64 positions?
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>

I'm not familier with the trinamic chip, but I'll hazard a guess.

90 degrees electrical per full step, divide by 16 microsteps per full
step and you get 5.625 electrical degrees per microstep,
so 1 motor revoultion (360 degrees) divided by 5.625 electrical degrees
per microstep and you get 64 microsteps per motor revolution

Aaron