Are all closed-loop stepper systems created equal?

Are all closed-loop stepper systems created equal?
No. Some manufacturers give the closed-loop stepper systems similar-sounding descriptions, which confuses the marketplace. As proof of the confusion, it's not uncommon that a designer requests one capability and actually needs another.

What are the most common closed-loop stepper systems?
There are three common types: nema 23 Closed-loop stepper with step-loss compensation; closed-loop stepper with load position control; and closed-loop stepper servo control. Stepper-drive manufacturers call them all "closed loop" but the three have distinct functionalities.

How do I get the right control for my application?
Machine builders must ask: Which control scheme does the application require? It may not be immediately apparent which control scheme the drive uses. Therefore, ask the manufacturer for details and review the documentation to ensure you get the right control scheme.

What are the functionalities of these closed-loop stepper systems?
nema 17 geared Closed-loop stepper with step-loss compensation is the most common type of closed-loop stepper control. The stepper drive operates as a micro-stepping drive and typically receives pulse and direction commands to move to the desired position. An encoder tracks shaft or load position. If lost steps are detected, a compensation algorithm inserts additional steps so that the motor shaft (or load) arrives at the desired position. Typically, the stepper-motor drive has settings for two currents: The motor gets running current when in motion and gets resting current when stopped.

What are the advantages and disadvantages of the different functionalities?

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