After I build my next Z axis, I'd really like to build a Z axis mounted 4th axis. I'm thinking in this situation it's called an A axis. Anyways, I'm sketching out some ideas but I'm stumped on how you would home it. Since it'll rotate left and right, I wouldn't be able to use the cheapo homeing lever switch I use now for my x, y, and z since as it would run over it. I've thought about a detachable hard stop but I'm sure something much better has been done.
I've read through some 4th axis builds but I havn't seen anything about homeing it. Can someone enlighten me?
Also I notice a lot of 4th axis's use servos and not steppers. Any particular reasons?