Hey everyone, I am finally going to install limit/homing switches. I have 3 pins left on the BOB and would be enough to give all 3 axis their own pin but none future expansion.
My question is If each axis has its own pin will all 3 axis home at the same time or would it only do 1 axis at a time.
If it does 1 axis at a time in my mind it wouldn't be worth 3 pins it would only be worth 1 pin unless I am completely missing something.
Thanks for you help.
You can make EMC home each axis one at a time or in any order you like with the HOME_SEQUENCE property in the ini file..
Usually you would make the Z home first so it's out of the way then you can do the others.. Set the home_offset a little away from the switch so it can't be accidentally triggered when the second axis goes to home.. If your using a limit switch for the home switch you also have to set home_ignore_limits so it won't fault out when it hits it. You can also set HOME_IS_SHARED so it won't start homing if one of the switches is already closed.
I always like 3 homes gets 3 inputs for debugging sake but if your low on IO go for it.
Last edited by dlktdr; 05-22-2010 at 05:22 AM.