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I am not familiar on how to calculate the stepper motor resolution to operate with multi-turn absolute rotary encoder.

Stepper motor details as follows,

  • Total step - 600;
  • speed - 160 pps;
  • Motor type - Biploar;
  • Step mode - 1/8.

Please advise.

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    \$\begingroup\$ Please edit your question to add a link to the motor and encoder datasheets. "Valve" is not the right word. If you add your location and language into your user profile we may be able to help. \$\endgroup\$ – Transistor Feb 17 '20 at 8:10
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Your motor has a total step of 600. It means, for a complete revolution, you have 600 steps. Hence the resolution appears to be 360°/600 = 0.6° per step. This is the resolution in what is called FULL MODE.

However, your motor can works in STEP MODE 1/8. That means that you can move the motor by 1/8 of a step. Hence, you can achieve 8 more steps and thus increase your resolution by 8. In this mode, your actual resolution is 0.6°/8 = 0.075°

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  • \$\begingroup\$ Thanks for your explanation. My encoder lists Linearity Resolution as 1/4096 and am Using CALT Encoder and not sure what it means ? (aliexpress.com/item/…) \$\endgroup\$ – Sasi Feb 17 '20 at 8:59

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