Z min always triggers TRIGGERED

M119 always returns TRIGGERED (or OPEN if I flip the connector) for Z min. I am using my own customized version of marlin on RAMPS 1.4. I am also using an inductive sensor. Does anyone have any solutions or suggestions? Is it a firmware setting I need to modify?

In Configuration.h:

const bool Y_MIN_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.

Don't know if inductive sensors need pullup resistors, but you may also need to play with this line:

// #define ENDSTOPPULLUP_YMIN

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[3DKarma.com] - suppliers of quality, affordable 3D printer kits and filament for the UK market.

Chech your proximity switch, it is a NO or NC? Depending on type you would have to invert the logic, they need to have the pull up resistors since they throw voltage to ground.

I seem to have two endstop pullup resistors statements. They look the same to me. Could you tell me which one to modify?

The first part, the bold ones indicate that you set the endstops pull up for all endstops, that is right as long as you have mechanical switches or any switch that will allow voltage to ground (some switches already has them)and they are set so you don't create a short circuit. the second part, the one with yellow letters is the one that controls the logic (NC or NO).
If you want to understand it better, you can play with your switches. You got them all as true, now do an M119 code and switch to false any one showing triggered (without been actually triggered) after that repeat M119 and all should say open, trigger one with your fingers and run M119 again, the one you are holding will display "triggered".

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ggherbaz
The first part, the bold ones indicate that you set the endstops pull up for all endstops, that is right as long as you have mechanical switches or any switch that will allow voltage to ground (some switches already has them)and they are set so you don't create a short circuit. the second part, the one with yellow letters is the one that controls the logic (NC or NO).
If you want to understand it better, you can play with your switches. You got them all as true, now do an M119 code and switch to false any one showing triggered (without been actually triggered) after that repeat M119 and all should say open, trigger one with your fingers and run M119 again, the one you are holding will display "triggered".

I understand that difference. I am talking about the pullups. To me, it looks like a conditional that does the same thing for both conditions.

If any of your switches are connected to min. You need to delete the // for minimum endstops like 3dkarma mentioned.

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ggherbaz
If any of your switches are connected to min. You need to delete the // for minimum endstops like 3dkarma mentioned.

All of them are connected to min. I do not use max. My regular endstops trigger correctly though with the settings above.

[airtripper.com]

Probably this link will explain that part better than I can do.

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ggherbaz
[airtripper.com]

Probably this link will explain that part better than I can do.

Do you use marlin with an inductive sensor?

Sorry, you got it right, I'm used to use max for X and Y and min only for Z.

Yes but capacitive instead of inductive, same stuff at the marlin level though

Could you send me a preconfigured config or compiled firmware to test if it is my settings?

Can do it tomorrow, but sure. It might not be pretty though. I'm Lefty so I set my stuff opposite to the standard.

Ok. Thanks

Update: it is not my firmware. I just wired my printrbot probe in and it works. It is either my soldering or probe. Probably my soldering as the led triggers correctly.

I bought another probe with the same exact model number as the Printrbot probe. It still does not work. I could have simply received three defectives probes, but it could be I need to do something to the probe to get them to work for RAMPS.

I am not sure whether the Arduino can handle the type of signal that a proximity (inductive) switch delivers? Just a thought...

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