ramps 1.4 relay endstop wiring September 19, 2014 08:34PM |
Registered: 10 years ago Posts: 49 |
Re: ramps 1.4 relay endstop wiring September 22, 2014 10:04AM |
Registered: 10 years ago Posts: 49 |
Re: ramps 1.4 relay endstop wiring September 22, 2014 01:45PM |
Registered: 10 years ago Posts: 869 |
NO or NC doesn't matter. The pullup is needed to pull the signal and hold it high when the switch is open.Quote
blabberjack
My SSD is Normally Open, that is when current is not flowing through the input side (when the induction sensor is not actuated), no current can flow through the output side of the SSD.
Do I need a pull up (or pull down) resistor for this set up, I have found a wiring diagram for Normally Closed mechanical switches but I'm struggling to find a similar diagram for Normally Open switches.
The pullup resistors were either integrated into the board, or integrated into the microcontroller. Pull-up and pull-down resistors are not new and have been around for as long as digital circuits have existed.Quote
A long time ago I had mechanical switches as endstops for a Gen6 board, these switches had only two wires so I can only assume they used no pull up or down resistors, is there a reason they are now in common use?
It's printed right on the board. The three rows are labeled S, -, and +. - is ground, + is +5v and is used to power any active switches that require power (opto, hall effect, inductive, etc). Mechanical switches don't need/use the + pin. S is signal that needs to be shorted to ground when the switch is closed.Quote
My final problem is that I am unsure which pins on the Ramps board correspond to the +5V, Signal and Ground. I unwisely tried to figure this out by myself by plugging the output wires from my SSD into different pins but when I connected them between the pin closest to the edge of the board and the pin in the middle, when I closed the SSD, the board disconnected from my computer, luckily it seems undamaged, normally when I do things like this I end up with fried silicon for dinner.
Re: ramps 1.4 relay endstop wiring September 22, 2014 09:38PM |
Registered: 14 years ago Posts: 1,092 |
Re: ramps 1.4 relay endstop wiring September 23, 2014 07:42AM |
Registered: 10 years ago Posts: 869 |
Re: ramps 1.4 relay endstop wiring September 23, 2014 05:53PM |
Registered: 10 years ago Posts: 49 |