Ok, so I finally built a printer (Prusu i3 w/E3D running Marlin).
When homing the axes in Pronterface is it normal for the homed position to be with all end stops triggered? I’m used to my LinuxCNC box where homing does the opposite, it backs off the switch until it opens (or closes in my case). Is this the way most people do it, or is this a Pronterface thing?
That would not be pronterface. That would be the controller for the printer. It should back away from the end stop, hit it again and then back away again. It is a double tap to make sure it is exactly as close as it can be before being out of bounds.
So its a marlin setting? (RAMPS 1.4)
Come to think of it, I suppose the controllers might work differently according to what brand. What controller do you have?
If it is supposed to work like my Rambo controller, maybe you have something set wrong in the firmware.
That is normal. You can set it in the firmware if you want it to back off and trigger it a second time. I have mine set where x and y don’t back off, z backs off 1mm and homes again.
Ya, I saw a bunch of videos with the same setup.
I have it working, but, in Marlin, it seems to be common theme, that you have to eliminate any soft stops, so it will run from the triggered position. Or I could just be reading the wrong posts 
Maybe I’ll try Normally Open switches 
Maybe there is something in the firmware about if the switch is normally open or normally closed?
Not that I see yet, but it may be right in front of me. That aside, I’m very impressed with first prints, with no calibration yet 
Ah. I did not see Brian’s post.