Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 October 28, 2016 02:53PM |
Registered: 9 years ago Posts: 111 |
#define AUTO_BED_LEVELING_FEATURE #define AUTO_BED_LEVELING_GRID
//#define ENDSTOPPULLUP_ZMINit was already commented.
#define FIX_MOUNTED_PROBE
#define ENDSTOPPULLUP_XMAX #define ENDSTOPPULLUP_YMAX #define ENDSTOPPULLUP_ZMAX #define ENDSTOPPULLUP_XMIN #define ENDSTOPPULLUP_YMIN //#define ENDSTOPPULLUP_ZMIN #define ENDSTOPPULLUP_ZMIN_PROBEleave commented only this line:
//#define ENDSTOPPULLUP_ZMIN
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 October 29, 2016 07:27AM |
Registered: 7 years ago Posts: 759 |
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 October 29, 2016 11:19AM |
Registered: 9 years ago Posts: 111 |
//#define ENDSTOPPULLUP_ZMIN
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 October 29, 2016 05:07PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 October 29, 2016 08:28PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 October 31, 2016 07:57AM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 October 31, 2016 10:33PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 01, 2016 03:42PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 05, 2016 10:00PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 07, 2016 02:50AM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 07, 2016 03:35AM |
Registered: 9 years ago Posts: 111 |
Quote
nebbian
Are you talking about the LED on the sensor itself? What happens if you disconnect the diode altogether? Have you tried sensing something more solid, like a metal washer? Are you sure that the black wire is connected to signal, and the blue one connected to ground? Is 12V on the brown wire? Have you tried disabling the endstop pullups in the software?
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 07, 2016 08:04AM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 07, 2016 10:05AM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 07, 2016 03:56PM |
Registered: 9 years ago Posts: 111 |
#error "A probe needs a pin! Use Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN or Z_MIN_PROBE_PIN."
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 07, 2016 10:18PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 08, 2016 03:47AM |
Registered: 9 years ago Posts: 111 |
Quote
nebbian
Can you take a photo of where your brown wire is connected to please?
Also what sort of diode is that?
Can you please disconnect the black wire from the diode, and measure the voltage coming out of the sensor when:
a) near metal
b) not near metal
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 08, 2016 06:23PM |
Registered: 9 years ago Posts: 111 |
Quote
nebbian
Can you please disconnect the black wire from the diode, and measure the voltage coming out of the sensor when:
a) near metal
b) not near metal
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 08, 2016 06:34PM |
Registered: 8 years ago Posts: 916 |
Quote
dont_go_away
Hi,
This is the photos you're asked me:
[attachment 85923 2016-11-0720.20.15.jpg]
[attachment 85925 2016-11-0823.33.44.jpg]
Quote
nebbian
Can you please disconnect the black wire from the diode, and measure the voltage coming out of the sensor when:
a) near metal
b) not near metal
If I connect the black wire without diode, I'm afraid to burn the z_max pins also, because I have already burned z_min pins connecting the black wire without diode. And if I burn the z_max pins I must change RAMPS (or Arduino, I don't know)
Do you have another advice? Thanks!
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 08, 2016 06:47PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 08, 2016 07:54PM |
Registered: 9 years ago Posts: 111 |
Quote
nebbian
Also in the picture above, the diode is around the correct way. Didn't you say that you had to reverse it?
Quote
nebbian
Do not connect the black wire to anything, just measure the voltage on the black wire with it only touching your multimeter. I need measurements with the sensor triggered (close to foil, LED showing), and also a different measurement when the sensor is not triggered (LED is dark).
For this measurement, the black wire of your multimeter should be touching the negative terminal on your RAMPS input.
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 08, 2016 09:27PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 09, 2016 03:54AM |
Registered: 9 years ago Posts: 111 |
Quote
nebbian
How can the voltage on the negative terminal (blue wire) be 12V when it's grounded?
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 09, 2016 07:44PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 10, 2016 02:29AM |
Registered: 8 years ago Posts: 916 |
Quote
dont_go_away
I retried the measuraments without diode and this is the result:
I connected the blue wire to the power supply and then I put the black probe of the multimeter to the blue wire of the sensor and the red probe of the multimeter to the black wire of the sensor.
I have 5.76v when the LED is off and 5.71v when the LED is on.
Is this possible?
Thanks!
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 10, 2016 09:16AM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 10, 2016 02:17PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 10, 2016 05:10PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 10, 2016 07:49PM |
Registered: 9 years ago Posts: 111 |
Quote
obewan
what readings do you get when you trigger the sensor as in this diagram ?
Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 10, 2016 09:07PM |
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Re: Sensor LJ18A3-8-Z BX NPN NO - problem with Prusa i3 November 11, 2016 03:54AM |
Registered: 9 years ago Posts: 111 |
Quote
nebbian
What readings do you get when the probe is
a) triggered
b) not triggered