Originally Posted by Glidergider  Hi Ferverx,
Always remember that I'm a newbie at this stuff too. I've read a lot of posts, but what I do may not be good for you. Tonight, I'll take some pics of my RatShack micro switches.
When you solder the switch always use the NC lugs. Thus the switch is always closed in normal operation. That's the best option for safety. If the wire breaks your machine stops. If the switch is contacted the machine stops. Either way you are safe.
I have 4 circuits. 3 of them are Home circuits for the -x, -y and -z axis. The 4th circuit is a series circuit of +x, +y and +z switches. If any of those switches opens, then the machine stops.
In Mach3, the software gives you the option to find the home or negative x,y&z limits of your machine. This is helpful at times.
Look again at that schematic link. It shows how easy a limit switch is to connect.
Dave |
Hi Dave,
I am just curious and hope you can help me to answer this. I know what are limit switches used for, but what I don't know is what happen if you don't use a limit switch in your axis? Will the table slide off the ball screw or something like that if there isn't any switches?
Also, I read somewhere that you need 2 limit switches for both x and Y axis and only 1 switch for the z. Is that how you set up your mill? Thanks.