In all my travels along the super highway I have never seen stepper wires twisted like this. Could doing so cause a problem with the motor? or microprocessor? or anything else?
Will the length of the wires be any problem? The processor is very close by, so I could have them quite short if need be.
Thanks.
Like what?
Twisted pairs are very common and if you have a differential receiver, can minimize common mode noise. Contrariwise, it can minimize radiated energy by sending out equal and opposite signals on each wire.
Sorry. It wouldn't allow the image to be saved with the post. Something about a security violation??
Sorry for my comment from before now i see what are you talking about. No this won't affect motor or microprocessor at all.
As I said, that is good practice and won't affect the motor at all.
In fact, by carefully twisting the wires you can create a transmission line with a specific impedance so the shunt capacitance will not affect frequency response.
MavenScout:
In all my travels along the super highway I have never seen stepper wires twisted like this. Could doing so cause a problem with the motor? or microprocessor? or anything else?Will the length of the wires be any problem? The processor is very close by, so I could have them quite short if need be.
Thanks.
If you have any motor with loose wires its a good idea to form them into twisted pairs like this to reduce
interference being emitted by the wiring. Its vital to twist the two wires from a single winding
together, not wires from different windings. If uncertain wind them all together.
The twists cancel each other out and reduce the magnetic (near field) interference dramatically compared
to loose wires or even parallel straight wires.
Its no accident ethernet cable is made of twisted pairs. Or the old telephone cables come to that.
As for the processor, keep it well away from all the high current stuff.
Thanks MarkT, I learned something.
Maybe it is worth mentioning that twisted pair of wires is only used for DC currents.
AC sees increased impedance due to the effective inductance that the twisting creates.
Watcher:
Maybe it is worth mentioning that twisted pair of wires is only used for DC currents.AC sees increased impedance due to the effective inductance that the twisting creates.
What on earth are you talking about?
You clearly know nothing about transmission lines.
Sorry to appear rude, but you are completely wrong and you've posted as if you know this
rather than guessed it.
A typical twisted wire creates a transmission line with characteristic impedance Z=90-120ohm.
If the termination impedances are equal to its Z you can mess with GHz easily 
pito:
A typical twisted wire creates a transmission line with characteristic impedance Z=90-120ohm.
True. However the twist has nothing to do with it, except for holding the wires in close proximity to each other.
These are power wires, not signal, and they're nowhere near long enough for transmission line effects to be anywhere close to noticeable, much less significant.
See these ideas, a few posts later it mentions setting the twists with a hot air wand.
The hot air gives great results.
https://forum.arduino.cc/index.php?topic=445951.msg3116513#msg3116513
https://forum.arduino.cc/index.php?topic=445951.msg3116670#msg3116670
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