I'm thinking about Using closed loop stepper motors and drivers in 3d printer.

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(Athul S Nair) #1

I’m thinking about Using closed loop stepper motors and drivers in 3d printer. If any of my axis have two stepper motors, I will connect them parallel. Is same possible with closed loop steppers, since they have encoders attached???

(Peter Peters) #2

No, it is not possible.

You can’t connect both encoders in parallel. The driver gets confused by the overlapping and possibly contradicting signals.

The main reason for closed loop motors would be to make sure a motor that is missing steps is adjusted to catch up those missing steps. And only that one motor should. If connected in parallel you can’t correct for those mistakes even if you could process the data from the encoders separately.

(Athul S Nair) #3

@Peter_Peters So If my Y axis has two stepper motors, I should use two drivers, right?? One for each

(Peter Peters) #4

@Athul_S_Nair Yes, that is right.

(Ulrich Baer) #5

you can connect the drivers (input) in parallel.

(Athul S Nair) #6

@Ulrich_Baer STEP, DIR, ENABLE pulses

(Ulrich Baer) #7

you should also ensure that ALM will shut down both driver not only the faulty one.