Proximity switches or limit switches

[JAZZCNC]

Ah right, so would this be a proximity switch that could be mounted midway between say a gantry side. So its a single switch that detects a metalic reference point as it travels to the side of it at the ends of each axis. Or is there also a mechanical switch that could do this?
I like this idea it makes a lot of sense.

You can use the same approach with simple mechanical switches but they tend to slide over a ramped trigger plate to prevent damage to switch. Or you can buy Lever type mechanical switches with end stop that flicks the lever.
Proximity switches are my preferred switch type because they are none contact cheap and simple to use and fit.