want to ask how to wiring inductive proximity sensor to ramps 1.4 board?

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//===========================================================================
//=============================Mechanical Settings===========================
//===========================================================================

// Uncomment the following line to enable CoreXY kinematics
// #define COREXY

// coarse Endstop Settings
#define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors

#ifndef ENDSTOPPULLUPS
// fine endstop settings: Individual pullups. will be ignored if ENDSTOPPULLUPS is defined
// #define ENDSTOPPULLUP_XMAX
// #define ENDSTOPPULLUP_YMAX
// #define ENDSTOPPULLUP_ZMAX
// #define ENDSTOPPULLUP_XMIN
// #define ENDSTOPPULLUP_YMIN
// #define ENDSTOPPULLUP_ZMIN
#endif

#ifdef ENDSTOPPULLUPS
#define ENDSTOPPULLUP_XMAX
#define ENDSTOPPULLUP_YMAX
#define ENDSTOPPULLUP_ZMAX
#define ENDSTOPPULLUP_XMIN
#define ENDSTOPPULLUP_YMIN
// #define ENDSTOPPULLUP_ZMIN
#endif

// The pullups are needed if you directly connect a mechanical endswitch between the signal and ground pins.
const bool X_MIN_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
const bool Y_MIN_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
const bool Z_MIN_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
const bool X_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
const bool Y_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
//#define DISABLE_MAX_ENDSTOPS
//#define DISABLE_MIN_ENDSTOPS

// Disable max endstops for compatibility with endstop checking routine
#if defined(COREXY) && !defined(DISABLE_MAX_ENDSTOPS)
#define DISABLE_MAX_ENDSTOPS
#endif

// For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
#define X_ENABLE_ON 0
#define Y_ENABLE_ON 0
#define Z_ENABLE_ON 0
#define E_ENABLE_ON 0 // For all extruders

// Disables axis when it's not being used.
#define DISABLE_X false
#define DISABLE_Y false
#define DISABLE_Z false
#define DISABLE_E false // For all extruders
#define DISABLE_INACTIVE_EXTRUDER true //disable only inactive extruders and keep active extruder enabled

#define INVERT_X_DIR true // for Mendel set to false, for Orca set to true
#define INVERT_Y_DIR true // for Mendel set to true, for Orca set to false
#define INVERT_Z_DIR false // for Mendel set to false, for Orca set to true
#define INVERT_E0_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
#define INVERT_E1_DIR false // for direct drive extruder v9 set to true, for geared extruder set to false
#define INVERT_E2_DIR false // for direct drive extruder v9 set to true, for geared extruder set to false

// ENDSTOP SETTINGS:
// Sets direction of endstops when homing; 1=MAX, -1=MIN
#define X_HOME_DIR -1
#define Y_HOME_DIR -1
#define Z_HOME_DIR -1

#define min_software_endstops false // If true, axis won't move to coordinates less than HOME_POS.
#define max_software_endstops true // If true, axis won't move to coordinates greater than the defined lengths below.

// Travel limits after homing
#define X_MAX_POS 210
#define X_MIN_POS 0
#define Y_MAX_POS 210
#define Y_MIN_POS 0
#define Z_MAX_POS 180
#define Z_MIN_POS 0

#define X_MAX_LENGTH (X_MAX_POS - X_MIN_POS)
#define Y_MAX_LENGTH (Y_MAX_POS - Y_MIN_POS)
#define Z_MAX_LENGTH (Z_MAX_POS - Z_MIN_POS)

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CptanPanic
I am having some problems hooking this up also. I have a NPN capacitive proximity sensor, hooked up with the 12V. If I just test it by itself, it seems to work fine. The red LED on the back lights up when it gets close to object, and the sensor wire (Black) goes from 9.5V to 0. The problem is in order to hook up to RAMPS I got a LM7805, and when i connect it to the sensor, the LED comes hard on, and I do not get any input as if was being triggered. Any ideas?
Thanks.

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CptanPanic

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CptanPanic
I am having some problems hooking this up also. I have a NPN capacitive proximity sensor, hooked up with the 12V. If I just test it by itself, it seems to work fine. The red LED on the back lights up when it gets close to object, and the sensor wire (Black) goes from 9.5V to 0. The problem is in order to hook up to RAMPS I got a LM7805, and when i connect it to the sensor, the LED comes hard on, and I do not get any input as if was being triggered. Any ideas?
Thanks.

So I did some more research, and it seems that I had things wrong. As this is a NPN sensor it seems I do not need the LM7805, as it acts as an open collector. So I should be able to just connect to endstop sensor pin with internal pullup, but this doesn't work either. When I do this, the LED on the sensor turns on as soon as I connect to pin.

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gustavogoulart
Hello! Everything working here, the problem (aside the error I made with the wires) was the firmware. I was using one branch, and the branch has some bug that causes this problem. Solved now here with the stable firmware.

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wendychai80

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CptanPanic

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CptanPanic
I am having some problems hooking this up also. I have a NPN capacitive proximity sensor, hooked up with the 12V. If I just test it by itself, it seems to work fine. The red LED on the back lights up when it gets close to object, and the sensor wire (Black) goes from 9.5V to 0. The problem is in order to hook up to RAMPS I got a LM7805, and when i connect it to the sensor, the LED comes hard on, and I do not get any input as if was being triggered. Any ideas?
Thanks.

So I did some more research, and it seems that I had things wrong. As this is a NPN sensor it seems I do not need the LM7805, as it acts as an open collector. So I should be able to just connect to endstop sensor pin with internal pullup, but this doesn't work either. When I do this, the LED on the sensor turns on as soon as I connect to pin.

Sorry CptanPanic i didnt familiar with other sensor cause im just following other guide that i found and ask question here and there regarding my problem.

the sensor red led shine bright or just dim? or maybe you should double check your wiring again cause gustavogoulart sensor didnt work also until he fix the resistor wiring. Everything about wiring the sensor should be in this thread, and if this doesnt help you maybe you should open new thread about your problem cause i lack of knowledge about electronic thing.

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ggherbaz
I usually set my sensors this way:

Brown and blue goes to power supply, this way I know my sensor have enough power to give me maximum sensing distance. Then I connect the black signal wire to an LM7805 pin 1, pin 2 goes to ground and pin 3 (regulated 5 volts) goes to signal pin on endstop connector.

There is a risk that if the regulator fails, the whole 12 volts will go to the board frying it, but it is minimal since usually when the regulator fails they stop supplying voltage and also the power consumption it so small that the regulator never get stressed enough to make it fail.

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madmike8
I have a M12 NPN 3 wire NO proximity sensor.

Wiring it the way Smerrett79 did on his Smartrap Core..

Brown - 12v
Black - Ground
Blue - Signal

I get a Dimly lit LED and 2.84v without metal near sensor, and a Brightly lit LED and 0v with metal near sensor.

I connected the blue directly to RAMPS Zmin Signal as he said to, and it worked.

I made sure ZMin Endstop Inverting was set as true like below.
const bool Z_MIN_ENDSTOP_INVERTING = true;

Borrowed the Image above and edited it to match for NPN sensors.

[attachment 62002 RAMPS_NPNProximitySensor.png]