Hello, All,
I have a question about my Adafruit Motor Shield v2.3 that I'm sure has already been answered, but I haven't been able to find it. I have a bi-polar stepper motor, (I'll see about therapy for it, later), and I know which wires are A, A-, B, and B-. I get that the A channel connects to M3, and the B channel connects to M4, but it isn't clear to me which of the two connections for each channel should be the A-/B- terminals.
( I *almost* have enough data, because the site lists specifically how to wire up the Adafruit NEMA 17 stepper motor, but, I could find any indication of which wire was A, and which was A-. :^( And, this first stepper I'm using is not one from Adafruit... those motors won't be here until Friday.)
Thanks,
Karl
Wiring up a stepper
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- adafruit_support_bill
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Re: Wiring up a stepper
Either way will work. If you don't like the direction it rotates, reverse the pair.
- karlwlewis
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Re: Wiring up a stepper
Thanks, Bill... but, but, but, I was thinking that both pairs need to be oriented the same way, or it seems like bad things would happen. I mean, it's clear that for a given pair, it isn't an issue, per se, but, since it is a system of two windings, I would have thought it mattered that both sets of windings agree. I am willing to be wrong.
Be well,
Karl
Be well,
Karl
- adafruit_support_bill
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Re: Wiring up a stepper
True, you do want both parallel windings to agree. But without a motor spec I can't offer any specific advice. However, as long as you keep within the current limits of the driver and motor, you are not likely to break anything while trying to figure out which combination works.
- karlwlewis
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Re: Wiring up a stepper
Thanks, again. I have the motor spec., so that bit is easy. What I was hoping you could tell me was which terminal is which, on the board.
There are 5 terminals on the block:
M3 has two connectors, then comes GND, then two more for M4.
So, is it: +,-,GND,+,-, or +,-,GND,-,+, or, -,+,GND,-,+, or -,+,GND,+,- ?
Based on my experiments, I think it is: +,-,GND,+,-, but, I can't tell for certain, yet.
Thanks,
Karl
There are 5 terminals on the block:
M3 has two connectors, then comes GND, then two more for M4.
So, is it: +,-,GND,+,-, or +,-,GND,-,+, or, -,+,GND,-,+, or -,+,GND,+,- ?
Based on my experiments, I think it is: +,-,GND,+,-, but, I can't tell for certain, yet.
Thanks,
Karl
- Franklin97355
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Re: Wiring up a stepper
I don't have one but the schematics and board layout are HERE for your viewing pleasure. ;)
- karlwlewis
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- Joined: Thu Feb 05, 2015 6:16 pm
Re: Wiring up a stepper
Thanks... regrettably, I don't seem to have ready access to anything that will render the .sch file on my Linux boxes, (Still looking.)
Karl
Karl
- adafruit_support_bill
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Re: Wiring up a stepper
The point is, it doesn't really matter. There is no positive and negative terminal. The polarity reverses. That is the whole point of an H-bridge.Thanks, again. I have the motor spec., so that bit is easy. What I was hoping you could tell me was which terminal is which, on the board.
- karlwlewis
- Posts: 6
- Joined: Thu Feb 05, 2015 6:16 pm
Re: Wiring up a stepper
Oooooooh. I gets it. Finally. Thanks for your patience. I see. Right.
Thanks,
Karl
Thanks,
Karl
- adafruit_support_bill
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Re: Wiring up a stepper
EagleCad is a free download:I don't seem to have ready access to anything that will render the .sch file on my Linux boxes
http://www.cadsoftusa.com/download-eagle/
Please be positive and constructive with your questions and comments.