Home/Limit Switches

For a simple DIY cnc router build, and assuming the switch repeatability is there. With LinuxCNC and a 7i76e control board is it OK to use the travel limit switches as the Home switches?

Project_Hopeless wrote:

For a simple DIY cnc router build, and assuming the switch repeatability is there. With LinuxCNC and a 7i76e control board is it OK to use the travel limit switches as the Home switches?

Yes, linuxcnc.org/docs/html/config/ini-homing.html#_home_is_shared

Yes. You will need a home offset. I started at .2inch and narrowed in during tests.

Search is 30ipm and about 1.5for latch.

Then it jumps off the switch the offset amount and sets zero there.

You've got enough inputs on that board to use a switch for each. Home sequence can be zero for all and they would zero all at once.

If you share an input, set z to sequence zero and the rest increment by one so they will go one at a time

Because you have enough inputs, I'd recommend you use seperate limit switches at each end and a separate home switch. I Use a shared home/limit on my Z axis due to lack of space. Its the one that has given me the most grief....

rodw wrote:

Because you have enough inputs, I'd recommend you use seperate limit switches at each end and a separate home switch. I Use a shared home/limit on my Z axis due to lack of space. Its the one that has given me the most grief....

If you hit an end of stroke limit can you in a programmed and controlled manor run past the limit to a home switch? Or is the limit hard wired to kill power?

My though is I could use the less expensive snap switches for stroke limit then just beyond those Home on a couple of pogo pins. That way I shouldn't overshoot and bend the pogo pin.