mmt Wrote:
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> What should happen with wires 15 & 16 on the 20
> way ribbon cable? The wiki build manual says
> they are "Guard loop GND" and with a pic "Note the
> two guard wires linked together and insulated. "
> Does this mean solder them together & insulate the
> join?
Yes
> Where do the other ends go? Into any GND on the
> controller board?
Yes
>
> Also what they for - reduce stray inductance?
My theory is that it reduces the inductive coupling between the motor wires and the limit switch by separating them by a shorted turn. Without the short it only gives capacitive screening.
Whether the theory is correct or not, it seems to work in practice.
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