Poor soldering causing problems with Z axis



  • My Z has been showing a phase problem. I changed the motor and the cable but it never resolved. upon inspecting my Duet 2 wifi I saw the soldering on the pins was poor and the pins had come away from the board. Should I request a replacement board? I bought it from Ooznest on 10th April (under 2 months) and really dont want to be without a printer. I'll solder it up for now but I'm not happy with it at all.
    IMG_20200601_091215.jpg



  • @corythompson said in Poor soldering causing problems with Z axis:

    Should I request a replacement board?

    I'd say yes, without a doubt, there could be more hidden problems, and worst case scenario is something gets damaged when it fails mid-print.


  • administrators

    It appears that a lot of pressure has been applied to the pins of that connector at some point, because they have been pushed down hard enough to break the solder. I am also surprised that the solder didn't penetrate the plated-through hole. If you would like your board replaced, please do not solder it yourself, we need to receive it as you did so that we can investigate how it may have happened.



  • @dc42 said in Poor soldering causing problems with Z axis:

    It appears that a lot of pressure has been applied to the pins of that connector at some point, because they have been pushed down hard enough to break the solder. I am also surprised that the solder didn't penetrate the plated-through hole. If you would like your board replaced, please do not solder it yourself, we need to receive it as you did so that we can investigate how it may have happened.

    Too late I've soldered it now. The solder has not penetrated the through holes on the other connectors too. I don't want to be without my printer while I wait for a replacement. There hasn't been any more force than what's required to connect the plug. I also had to solder the heater 0 screw connector, although I'm not convinced this should happen, I can understand somewhat on this screw connector given the twisting motion it endures. I'll add some pics of the through holes.



  • If you have soldered the board, I would say you just voided the warranty....



  • @CaLviNx said in Poor soldering causing problems with Z axis:

    If you have soldered the board, I would say you just voided the warranty....

    Should we vote on it now or debate it first?



  • @zapta

    Most electronics come with one of the following for a reason...

    warranty void sticker



  • @CaLviNx said in Poor soldering causing problems with Z axis:

    @zapta

    Most electronics come with one of the following for a reason...

    warranty void sticker

    and https://www.duet3d.com/warranty also states

    This policy does not apply if the product has been tampered with, repaired and/or modified by non authorised personnel.

    but that is probably best left to Duet3Ds discretion and not an angry mob with torches and keyboards..

    @corythompson said in Poor soldering causing problems with Z axis:

    There hasn't been any more force than what's required to connect the plug.

    Pardon my skepticism, but are we to assume you looked up the data sheet and measured the force applied to be 11N but didn't notice the pins got pushed through the board? Also the majority of the force goes towards mating the plastic parts, for the two center pins to be pushed down more than the rest you'd need some gremlins involved? (or poorly terminated terminals or wrongly inserted blocking the path for the pin?)



  • @bearer said in Poor soldering causing problems with Z axis:

    but that is probably best left to Duet3Ds discretion and not an angry mob with torches and keyboards..

    These forums have dual purpose community discussions and customers/Duet3D communications, so it feels that sometimes it's more appropriate to just watch.

    I apologize for may sarcastic post and kudos for the OP for diagnosing the problem since it's on the dark side of the board.



  • @zapta said in Poor soldering causing problems with Z axis:

    I apologize for may sarcastic post and kudos for the OP for diagnosing the problem since it's on the dark side of the board.

    I took it as a "grab the popcorn" post. 😉

    It's up to Duet to decide what they want to do with any individual case and I have no comment on this one.
    However anyone who wants to bring out the "you touched it, so no warranty" card doesn't really know anything about consumer law.
    Whilst it's different in every country, in Australia (and I suspect GB), there are common law consumer rights which cannot be taken away by "conditions"
    Principal among these is the product must be "fit for condition"
    i.e. It has to do what they told you it would do.

    If the case of someone other than the manufacturer carrying out work on the product, then the manufacturer must prove that the work done was the cause of the fault before they can refuse warranty.

    Car manufacturers can't refuse warranty if you get your car serviced at your local mechanic provided that they follow the manufacturers specifications.

    In this case, the board should have been returned as it was, purely because Duet needed the evidence to be able to rectify any manufacturing shortcomings.
    I've seen many warranty claims issued on this forum that were quite likely due to operator error.
    It's one of the reasons I wouldn't buy a clone.
    That sort of product support has a cost.



  • @OwenD said in Poor soldering causing problems with Z axis:

    I've seen many warranty claims issued on this forum that were quite likely due to operator error.
    It's one of the reasons I wouldn't buy a clone.

    +1 .... or more like +3 ..... exceptional support which makes the Duet products a bargain!



  • Here's some more images. I've lifted the mating part of the connector on some of the other blocks. Some of them have the solder coming through the holes correctly and some don't.

    IMG_20200602_090408.jpg IMG_20200602_090248.jpg IMG_20200602_090231.jpg


  • Moderator

    @corythompson Sorry for the inconvenience that you have been supplied with a poorly soldered board. This is undoubtedly a warranty issue, and the board would normally be replaced. However, we are quite clear in our warranty terms about user repairs:

    This policy does not apply if the product has been tampered with, repaired and/or modified by non authorised personnel.

    https://www.duet3d.com/warranty

    @dc42 specifically asked you NOT to repair it, too.

    The difficulty is that we want to be able to return it to the manufacturer to show them that there is a problem with their process, so we don’t have more boards soldered in such a poor way, ideally by identifying the worker who did this board and ‘educate’ them! For that, we need the board as it was supplied.

    If you are happy with your repair and don’t want to replace the board under warranty, so be it; that’s up to you. We will, of course, continue to support you. If you want to exchange it now, we’ll need to have an internal discussion about whether we can do that, for the reasons outlined above.

    At the very least, can you take a picture of the top side of board, including the sticker on the processor? This shows the date of manufacture and which company made the board (we use two).

    Lastly, if you are keeping the board, I’d rework ALL the through-hole components; clearly there was an issue with the soldering of this board.

    Ian


  • administrators

    @corythompson, I've discussed this with my colleagues, and if you wish we will take it back for warranty replacement even though you have soldered it.



  • @dc42 thanks. I'll make arrangements soon. I think it's best to have it replaced, I'd hate to lose a pad.


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