Limit - Home switches

I would like to add limit and Home switches to my Sherline. I am trying to make this machine as close to a 'real' or 'big' machine as reasonably possible to act as my learning platform. I have down loaded several drw of how limit and home switches are wired and they seem to conflict. One shows them all in series activating an E-Stop. Others show individual axis switches wired back to individual pins on the controller.

What are the crucial differences and why? Which way works most reliably and is safest? Which way can use the least number of switches to get homing and limits?

PJH

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