Hi guys, i'm just about to get my mach3 licence for my machines. I have 2 lathes and one mill and a seperate computer for internet and gcode writing, do i need to buy 4 licences or can i use the one licence to run the 3 machines and seperate computer.

If you are using the machines to make money Artsoft asks that you buy a licence for each machine so in your case you would require a licence for each lathe and one for the Mill. If you are just doing the machining for your own pleasure and are not selling anything made on the machines then you only need one licence. Obviously you could say you were not selling the parts and only buy one licence and it is up to you. But when you think about the cost of a licence it is not much so it would be up to your conscience which way you went.
For the desktop computer you dont need to buy a licence.

Hood

ok thanks.