Comments on: Don’t trust the internet (and how to add an Inductive Proximity Sensor to your 3D printer the proper and easiest way) https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-sensor-to-your-3d-printer-the-proper-and-easiest-way/ I must be missing something. Mon, 04 Mar 2024 06:25:40 +0000 hourly 1 https://wordpress.org/?v=6.6.1 By: Mini proiect (56) – Citirea unui senzor inductiv cu ESP32 și afișare pe un LCD20x4 – Automatic house blog https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-sensor-to-your-3d-printer-the-proper-and-easiest-way/#comment-1519 Mon, 04 Mar 2024 06:25:40 +0000 https://mertarauh.com/?p=508#comment-1519 […] https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-senso… […]

]]> By: Webbes https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-sensor-to-your-3d-printer-the-proper-and-easiest-way/#comment-983 Fri, 24 Sep 2021 07:36:08 +0000 https://mertarauh.com/?p=508#comment-983 In reply to Youri.

I cannot tell without a connectionschema

]]> By: Youri https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-sensor-to-your-3d-printer-the-proper-and-easiest-way/#comment-982 Wed, 22 Sep 2021 18:08:11 +0000 https://mertarauh.com/?p=508#comment-982 So i added a proximity sensor to my 3D printer without any resistors and it seems to be working just fine. Are there any hazards for not putting in more resistors or will it just be safe to keep doing it like this?

]]> By: Webbes https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-sensor-to-your-3d-printer-the-proper-and-easiest-way/#comment-978 Wed, 30 Dec 2020 19:51:14 +0000 https://mertarauh.com/?p=508#comment-978 In reply to Dipen.

I do not know the sensor or board so without a schematic drawing or picture, I cannot help you out.

]]> By: Dipen https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-sensor-to-your-3d-printer-the-proper-and-easiest-way/#comment-977 Mon, 07 Dec 2020 14:46:17 +0000 https://mertarauh.com/?p=508#comment-977 Hi, great article but I’m simply not sure how to solve this – I’m very new to electronics but have most of the tools required. I’m using a SKR Mini e3 board with a proximity sensor (EZABL clone). If I sense voltage across the connector going to the board, it’s only 2.5V open and then 1.9V close (sensing something). I assume I need to get the closed state closer to 0/GND so it will trigger. Is that correct? Also not sure how to fix that in firmware but have tried – can I hard wire a resistor myself in line with the connector or similar? Many thanks.

]]> By: Webbes https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-sensor-to-your-3d-printer-the-proper-and-easiest-way/#comment-972 Tue, 29 Sep 2020 08:10:22 +0000 https://mertarauh.com/?p=508#comment-972 In reply to Bruno Cabral.

Hey Bruno,

You seem to forgot to connect your RAMPS sensor input pin to the protoboard pin.

Right now you are connected like this: “protoboard pin -> diode -> sensor” which causes the protoboard pin to be pulled low when the sensor is triggered. As the diode prevents any current to flow from the sensor wire to the protoboard pin, there is nothing else right now that can ever cause the protoboard pin to go up to 5V.

You should ALSO connect your RAMPS sensor input pin to the protoboard pin. If the RAMPS sensor input pin, is pulled high (either by a resistor or configuration) THAT is what can give you a high measurement when the sensor is not triggered. The end result is: “protoboard pin -> diode -> sensor” AND “protoboard pin -> RAMPS sensor input”. The “RAMPS sensor input” should pull it UP to 5V, the “diode -> sensor” should pull it low to GND.

Kind regards,

Wesley

]]> By: Webbes https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-sensor-to-your-3d-printer-the-proper-and-easiest-way/#comment-971 Tue, 29 Sep 2020 07:16:34 +0000 https://mertarauh.com/?p=508#comment-971 In reply to Michael.

Doesn’t the sensor come with any documentation at all?

]]> By: Michael https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-sensor-to-your-3d-printer-the-proper-and-easiest-way/#comment-967 Sat, 12 Sep 2020 10:40:51 +0000 https://mertarauh.com/?p=508#comment-967 I have a question, I have a Anet ET4 Pro which already have a Capacitive, my friend want to change it to an inductive sensor on his. It is a NPN NO sensor but it seem they have done something to it. That it doesn’t work with high or low but by continuity only between the blue and black wire. Blue and black have very low voltage around 0.001-0.003v switching on and off. I try to test if there is a resistor inside but there is no ohm between brown and black. Just wonder what you think. Many Thanks

]]> By: Bruno Cabral https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-sensor-to-your-3d-printer-the-proper-and-easiest-way/#comment-966 Fri, 11 Sep 2020 16:36:24 +0000 https://mertarauh.com/?p=508#comment-966 In reply to Webbes.

Thanks for helping. Here are the pictures https://cutt.ly/SfUpRZc

I get 12V and GND directly from a powered RAMPS board, just one power source. 12V goes directly from RAMPS to sensor brown wire. I use a protoboard to easy attach the multimeter. GND comes from RAMPS to protoboard and from there to sensor blue wire. From sensor black wire there is a 1N4148 (as suggested) diode pointing to the sensor. I took the readings from the diode leg (multimeter red wire) and from GND (multimeter black wire). Appart from the negative reading all results were accordling to your “Installing a proximity sensor using a diode and external-pull” pdf so I’m stuck. Hope you can point what I did wrong…

]]> By: Webbes https://mertarauh.com/2017/01/18/dont-trust-the-internet-and-how-to-add-an-inductive-proximity-sensor-to-your-3d-printer-the-proper-and-easiest-way/#comment-965 Sun, 06 Sep 2020 11:15:13 +0000 https://mertarauh.com/?p=508#comment-965 In reply to Bruno Cabral.

How many power sources do you have? And where have you placed the negative lead? You should place your negative lead onto GND somewhere. Getting a negative value is strange. Can you take a picture and share it somewhere?

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