which is correct pinout on filament sensor to board?
I went through a double (leap) upgrade, from MK2S to MK2.5 to MK2.5S. I got my mk2.5 upgrade kit from Prusa, but I got the mk2.5S filament sensor and cable (upgrade) from a third party.
My filament sensor isn't working, and consequently I have to turn that off to get prints.
The pictures during installation ( https://manual.prusa3d.com/Guide/4.+Electronics+assembly/1151?lang=en ) Step 3, photo 3, shows the pin out for the sensor cable to the board. It shows pin order: RED/BLUE/EMPTY/WHITE/EMPTY.
However, the cable I received has RED/BLUE/EMPTY/EMPTY/WHITE. The white was on the 5th pin. I figured that the official pictures were correct, and so I moved the white wire from position 5 to position 4. I did this during initial installation.
Since the sensor isn't working (I it goes into unload/load infinite loop during print start), then I think that the pictures must be wrong, and that the white signal wire should be on position 5? In that case, the pictures on the installation are wrong? Or I have a bad sensor from 3rd party vendor.
Please advise...
Best Answer by --:
A common problem is using the wrong row on the Rambo connector. Another problem is loading non-S firmware onto an S printer (during the MK3 vs MK3S updates it was very common). And there are problems with the mechanical interface of the flag - stickiness, and sometimes not clearing the IR sensor, and sometimes not quite getting into the sensor.
Here's the "stock" cable for the Mk2.5S IR cable - it shows pin 4 is occupied, 3 and 5 empty.
RE: which is correct pinout on filament sensor to board?
A common problem is using the wrong row on the Rambo connector. Another problem is loading non-S firmware onto an S printer (during the MK3 vs MK3S updates it was very common). And there are problems with the mechanical interface of the flag - stickiness, and sometimes not clearing the IR sensor, and sometimes not quite getting into the sensor.
Here's the "stock" cable for the Mk2.5S IR cable - it shows pin 4 is occupied, 3 and 5 empty.
RE: which is correct pinout on filament sensor to board?
Thank you.
Yes, the solution for me was to fix installation to the correct/lower pin bank. (I had installed to the upper bank based on misread of picture.)
Feedback for Prusa though! Add some description to that step to state lower versus upper. Consider rotating that 3rd picture, as it is "upside down", and makes it a bit more likely for somebody to misinterpret (given no verbiage and upside down picture both!)
Odd that my 3rd party upgrade cable had the white wire in wrong position (pin 5 vs 4). I never tested it in pin 5, but I'm guessing it wouldn't have worked out of the box.