Location of home switch

[terrymcc]

I am retrofitting a cnc router. Currently, the Y home switch is located at Y- at the front of the machine. I want the home switch to be at the Y+ back of the table. The machine has an ATC rack at the back. Should I locate the Y home switch so it is just the protected work area of the table and have the ATC scripts ignore the limit switch during tool change or measurement? Or, should I locate the switch at the extreme of the table and somehow prohibit the rack area during operations other than tool change and measurement?

Thanks for any experienced guidance.

[cncsnw]

Programming and setup will be simpler if you make it a home switch (and not a limit switch), and put it before the tool rack, at the end of the normal work envelope.

Your tool-change macro can then temporarily override the Y+ software travel limit -- either by putting a known positive value in that just allows access to the tool rack, or by just disabling software limits -- when needed for tool changes.

[terrymcc]

Thank you for the help.