Newbie questions on G540

[LatheMaster]

I have been reading threads to figure out what I need to know to hook up a G540 and all the gear . I saw one drawing that had relays on it . What is the reason for a relay and a coil ? Heres where I saw the drawing .

http://www.homanndesigns.com/EN010_V8.pdf

48V 20A Panel Mount Relay [RL-04] - US$8.50 : Homann Designs, The Preferred CNC Component supplier

Also there is talk on limit switches and home switches . I would like to use the same switches for both . Can I do this with the G540 ? Anybody have some good drawings on wiring these up . If I have to have separate switches for limit and home a good drawing of that or a link to a good thread would be great .

Thanks , Mike

[dmauch]

The purpose of the relays is to control the two AC receptacles outlets using M codes in your tool path file for ssories such as coolant pumps, mist coolant and other devices.
Mach3 allows ou to use the same pin number for the same home /limit switch. Simply configured all the same axis switches for the same pin. Connect the switches in series with one wire going to terminal 1 on the G540 and the other switch lead to power supply-. Config mach3 so that the X axis home + and - are all pin 10, Use 11 for the Y axis and 12 for the Z axis.
See the gecko data sheet for the G540 for a simplified drawing of the wiring.
Dan Mauch
Camtronics, inc. -- CNC with Dan Mauch
dmauch@camtronics-cnc.com
kits and assembled systems.

I have been reading threads to figure out what I need to know to hook up a G540 and all the gear . I saw one drawing that had relays on it . What is the reason for a relay and a coil ? Heres where I saw the drawing .

http://www.homanndesigns.com/EN010_V8.pdf

48V 20A Panel Mount Relay [RL-04] - US$8.50 : Homann Designs, The Preferred CNC Component supplier

Also there is talk on limit switches and home switches . I would like to use the same switches for both . Can I do this with the G540 ? Anybody have some good drawings on wiring these up . If I have to have separate switches for limit and home a good drawing of that or a link to a good thread would be great .

Thanks , Mike