Getting the limit switches working

[Vanguard]

This can be can be changed in the firmware, no rewiring. I need to look up how, will get back to you. Personally I wire N/C, that way if the circuit breaks, everything stops. It has to be done in firmware.
EDIT;
Back. Here is an easy way to get things to work, but I would wire it "normally closed", as said, that way if the circuit gets broken, it stops. Then you need to modify the firmware.

This article is great for setting up your firmware, and changing the logic of the end stops. airtripper.com/1145/marlin-firmware-vi-basic-configuration-set-up-guide/ Anybody building a RepRap should read this, it allows you to do a lot more with your printer.