Hey  guys I am new to this forum  and my home made cnc was working just fine I did some jogging  some homing  everything worked just fine until I tried  the free  download of cambam  and loaded a gcode with it.  now I am  getting a message  saying " limit switch trigger" external stop requested. this is a non stoppable  message, I have check my pins and ports setup and everything looks normal.  anybody knows if cambam was the problem or any suggestion on how to fix this. please help. and thanks

Welcome - but why have you hijacked someone else's thread? particularly as it has nothing to do with your problem. Here's one of your very own.