Help requested - installing end stop sensors onto my chinese 3018 Pro

[favouritesky]

Hi, thanks for the really quick response Doddy, appreciate your help.

I've attached photos showing the relevant part of the controller board.



"Green to +, black to -" - yes, this is how I had it previously (and red to S). So it perhaps seems like a simple case of having put the plug on upside down onto the controller board?


This is the actual switch I have (though just to add to the confusion, it's shown there with yellow in place of green, black and red are shown correctly).

[Doddy]

Hi, thanks for the really quick response Doddy, appreciate your help.

I've attached photos showing the relevant part of the controller board.



"Green to +, black to -" - yes, this is how I had it previously (and red to S). So it perhaps seems like a simple case of having put the plug on upside down onto the controller board?


This is the actual switch I have (though just to add to the confusion, it's shown there with yellow in place of green, black and red are shown correctly).

Yeah, those connectors provided with the switches aren't polarised - Orientate them with red=+, black=-, green=S. Ironically the connectors on the controller are polarised (different connector) so blame the accountants for penny pinching.

You shouldn't have damaged anything... much (perhaps lifed a microswitch or two), provided the PCB has survived.

[Doddy]

If, however, I've missed the point - if the connectors ONLY plug in one way around onto the controller card then we need a plan B. Let me know.

[dazp1976]

If, however, I've missed the point - if the connectors ONLY plug in one way around onto the controller card then we need a plan B. Let me know.

They are the same as lipo battery balance connectors.
If you're gentle you can push on the tabs of the metal connectors with a stanley knife and slide them out of the connector block.
Then swap them over, slide back in.
Jump to 2 mins 10 secs in on the video below.
https://www.youtube.com/watch?v=dYkTjXpTJaQ

[Doddy]

Dazp - the reason I posted what I did is because of this image from both Banggood and Aliexpress, there's a similar but less well defined image on Amazon. These taken from a search on RAMPS 1.4 End Stop from the URL OP provided that just didn't work for me.



Which shows a Dupont connector (non-polarised) at one end which allows for incorrect insertion into the controller card.

If, of course, the cable is different with the OP's switches and the appropriate mating connector has been used, but the pin order is incorrect - then I'd agree - depress the retention clip on each socket and remove, reorder and re-insert.