Sensor component fell off



  • The component marked in the picture (the actual sensor component) fell off when I hit my printhead to bed clamps. I should be able to solder it back, I have a cheap reflow station. Does the orientation matter? Am I able to see from the SMT component which way it should be on the board?

    0_1531251965967_board.png



  • This is a IR receiver and iam guessing that the orientation is crucial because it is a kind of transistor.
    The green box is on the side where the box is drawn (if i compare it to mine).



  • Orientation is important, as the 2 IR diodes (D1 and D2) both need to reflect into it. It is, however not too important as it is possible (mentioned in a guide) that one can slightly adjust it by angling it carefully.

    I would solder it back, more or less into position and see how it works. Remember that you have fine control in the configuration (like height when it triggers; value when it triggers etc), all of which should make it easy to repair and simply correct it like that. If the sensor does not trigger, I would then try to better angle it for the height I need.

    While testing the first time after soldering it back, try to trigger it way before your bed would trigger it - this is just to give time to stop the machine, if it does not trigger - avoiding crashing into the bed.



  • Thanks both.

    @jacotheron said in Sensor component fell off:

    Orientation is important, as the 2 IR diodes (D1 and D2) both need to reflect into it. It is, however not too important as it is possible (mentioned in a guide) that one can slightly adjust it by angling it carefully.

    SMT components tends to move on top of pads themselves. I am hoping I do not need to add new solder and it goes back to the original angle by itself.


 

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