I have Sainsmart Mechanical End Stops, and I'm building a Prusa i3 Rework.
I've recently gotten the x-axis to move, but it needs to stop when it gets to the end and it does not do that; I end up having to pull the plug.
From what I understand, there are two ways to wire ends stops in general, but you have to change the settings in the firmware to make it work right.
There are 3 connectors on the board:
- S (signal)
- - (ground)
- + (VCC)
My Sainsmart Mechanical End Stops have 4 connectors!!!
According to their website, left to right with the white connector facing you, they are as follows:
- Normally Closed (NC)
- Normally Open (NO)
Now it seems to me that if I take those connections and connect them as follows it should work...(ramps on the left, sainsmart end stop on the right):
- S (signal) -> S
- - (ground) -> Normally Open (NO)
- + (VCC) -> VCC
- nothing -> Normally Closed (NC)
...but! Screwing this up by either using the wrong firmware of selecting the wrong wire frys your board, so I thought I'd ask here. Sources please.