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11 votes
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Inductive Sensor in 24 V machine?

The inductive sensors work better when you apply a higher voltage than 5 V. Usually they are rated for 6-36 V, but please do check. To prevent frying your board when connecting the sensor ...
0scar's user avatar
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10 votes
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Using auto-bed leveling, do I need to initiate G29 before every print?

No, it is not necessary to call G29 before every print to "auto level the bed" 1) provided that: the bed surface has not changed (e.g. large load or ...
0scar's user avatar
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9 votes
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Automatic Bed Leveling (ABL) with a sensor (BLTouch, inductive, capacitive), how does it work?

The issues/questions raised about the automatic bed leveling using e.g. a BLTouch probe at this stack require a more in depth description of the automatic leveling functionality in general, this ...
0scar's user avatar
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7 votes

How to wire P.I.N.D.A. v2 to an SKR V1.3 board?

TL;DR To answer your question how (by assuming you have a 4 pins PINDA v2 sensor) to connect the sensor to your board, you have 2 options: Do not connect the white wire and treat the sensor as you ...
0scar's user avatar
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6 votes

Issues with Auto Bed Leveling

Your problem is that the hotend carriage does not stop when the sensor triggers. I assume you mean "on homing", not "while printing" (UPDATE: after watching the video it is confirmed that it is "on ...
0scar's user avatar
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4 votes

Inductive Sensor in 24 V machine?

Another possibility is to create a voltage divider circuit. In electronics, a voltage divider (also known as a potential divider) is a passive linear circuit that produces an output voltage (...
0scar's user avatar
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2 votes

Inductive Sensor in 24 V machine?

Minimalist Solution The very simplest possible implementation is to use a single resistor(!) to protect the input pin, as described in this source. The AVR inputs are protected from over/under ...
JPC's user avatar
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2 votes

Can I use a 12 V single channel optocoupler module in a 24 V machine?

You can safely use the module with 24V. The input side shows a red LED, optocoupler and 1k resistor in series. The LED and optocoupler probably have a voltage drop in the neighbourhood of 3.1-3.5&...
Tom van der Zanden's user avatar
2 votes

Sensor can not read temperature

I get this issue, more or less the same. In my case, it wont read temperature UNLESS both X and Y steppers are active. If any of those is open, it displays err/0.
Geo Gomez's user avatar
2 votes
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Inductive Sensor Causes Print To Stop

Solved the problem, I was missing this line: #define ENDSTOPPULLUP_ZMIN_PROBE Apparently the sensor required a pull-up to better define the signal.
orthehelper's user avatar
1 vote

X axis doesn't lift after levelling

I discovered something which could be the answer to the problem, in Marlin compiling there is: ...
Potato Lord's user avatar
1 vote

Ender 3 ignores signal from optocoupler

Not knowing the type of inductive sensor you are using, the most common, an NPN type sensor (like the LJ18A3-8-Z/BX) is assumed (in relation to your previous question). NPN type sensors imply that the ...
0scar's user avatar
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1 vote
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How to wire an LJ18A3-8-Z/BX sensor with an optocoupler to a stock Ender 3?

Both diagrams are exactly the same, the difference is the +5 V that is not connected on the bottom diagram (displayed in white, labelled "not used"), but since your endstops do not have a +5 ...
0scar's user avatar
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1 vote

Tevo Tarantula auto bed leveling config

An NPN sensor is wired differently from a PNP sensor. The signal wire is the black wire, blue is the ground wire. According to this posting, Don’t trust the internet (and how to add an Inductive ...
0scar's user avatar
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1 vote
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Hooking up an optocoupler in a 24V Machine, is a 2 kOhm resistor sufficient?

TL;DR Yes, a 2 kΩ resistor is sufficient to limit the current to about 12 mA through the optocoupler. With a maximum current specification of 60 mA you require at least 400 Ω; any resistor in between ...
0scar's user avatar
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1 vote
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M12 vs M18 V5 inductive probe

The larger the diameter and the higher the voltage the larger the detection distance. You do not need to do much wire modification if you use an optocoupler, see this anwer.
0scar's user avatar
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1 vote

Anet A8 with Marlin firmware: Auto Home is crashing into bed

You should un-comment the following line to get rid of the Probing failed error message: ...
0scar's user avatar
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