Hi!
I have a big, nema 23 stepper motor that needs a lot of current. Is it possible to connect two stepper drivers in pararell to double the current?
Absolutely NOT! IF you expect help you need to identify the stepper motor and a data sheet showing the electrical specifications. Just saying "big" gives no information that is usable. And NEMA 23 only identifies the size of the motor mounting flange.
The size of the stepper is not very relevant. I'm just asking if it's possible to connect two stepper drivers in pararell (like in the picture) to double the current output.
The size is not relevant, of course, so why not list the electrical requirements instead of the mounting size.
The answer is the same. Don't even try, but get a driver that is appropriate for the motor.
use ONE controller and drive the logic side through that. power the motor from an adequate power supply through a relay controlled by the stepper controller.
there are a number of illustrations of this on the forum.
For informed advice, post a link to the specifications for the motor.
No, you may not connect stepper drivers in parallel.
That will very probably instantly destroy both drivers and probably short out your supply too - absolutely not the way to go. Stepper drivers act as switch-mode power converters using the windings as the smoothing inductance.
The only possible exception is if you have an 8 wire motor in which case you can use the separate windings with separate motor drivers, but then you'd still have the problem of keeping the drivers in precise lock-step with each other.
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