Hi Volks, the proximity sensor of my 3D printhead is broken, i need a new. unfortunatly i dont can read nothing on the sensor, but i found this in the net. [image] %product-title% kaufen Top %brandid% Auswahl ✓ Schnelle & versandkostenfreie Lieferung ab 59,50 € möglich ➥ Jetzt günstig o…

I lay around this night and let my toughts spinning… Is it possible to exchange the sensor with a little circuit that is triggert by a swich a opener or a closer? I am a noob in electronics. But I think it must be possible. What do you think? @MooseJuice Yes it is a 3 wire sensor. @xchrisd Th…

There are ready to use sensors like industrial initiators to buy, it should not be really difficult to print or buy a holder and connect. Sry not at the PC, quick Google search here: [image] proximity sensor 2mm 24v - Google Search Alternative, a hardware switc…

Yes, you can infact do that If the voltage goes low upon sensing, you would need to consider this a normally closed contact instead of a normally open. i am surprised but not surprised at the same time, thanks so much for adding that information to the conversation @xchrisd Its possible I am mixin…

@MooseJuice You mean I have to measure the voltage on the sensors connector on the pcb in the Printhead? Is this right? The bouncing is no problem i think it reacts on first contact, then goes up a little bit and does the next.

Yeah I would just make sure the output pin reads 12 or 24V if you probe between the sensor output and + voltage, if it reads something else then we have to find a different way to wire it up, in the event the existing sensor has some kind of voltage reduction in its output. This is not likely but e…

@MooseJuice That would be a very early Xmas present for me if you do so! But only if it is not to many work for you. Greetings Stefan

eww, i was afraid of that. NPN or PNP? If its NPN it might still work, but i think id be afraid to do that test. We might have to find a pin someplace else on the board to tie in a switch. If the board is needing low voltage inputs, there may be the low voltage available someplace to use as a comm…

I can’t see the whole part number so I can’t tell. Does it matter? Just adds complication, but both are fine. These sensors are black boxes, they aren’t just a 3 terminal transistor. Only way to tell definitively would be look up the data sheet.

Well if trying to replace the prox with a switch, we would want to run the correct type of circuit through the common to the no or nc contact yes? if its NPN (sinking) it would be applying (-) to the pin while if its PNP (sourcing) it would be applying (+) Maybe Ill take home my banner engineering…

Need help with the proximity sensor of the 3D Printhead

Snapmaker 2.0 (3-in-1)

brent113 December 14, 2020, 4:45pm 11

I did some reconnaissance for the purposes of replacement here A350 - printing on glass

Output out the bench, out of the circuit is:
Triggered: 0.7V
Not triggered: 2.0V

Supply Voltage is 24V

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Need help with the proximity sensor of the 3D Printhead

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