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If anyone can explain to me why this happens.

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  • If anyone can explain to me why this happens.

    I was printing and congratulating myself on how well everything was working and then suddenly the printer started printing what it was supposed to print in the wrong place. I've heard this described before by the gurus on youtube as some kind of shift and I have experienced it before but I would just like to know what causes it. To me it seems like a gcode glitch.

  • #2
    I had this happen exactly once. It was after a power fluctuation. The printer tried to resume the printer, but the X and Y coordinates were off, so it got it wrong. I don't think it's really a gcode glitch as much as a failure of the printer to rehome the axes before trying to resume to print. Of course, there is the possibility that trying to home the Z axis could cause the hotend to bang into the print, but I can't think of a reason why at least the X and Y couldn't be homed.

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    • Geit
      Geit commented
      Editing a comment
      It depends on the accuracy of the homing. Usually the micro switches used to home are good enough, but the distance is not the same all the time. This changes the offset slightly on every home and for all axis.

      If the power went out, the print head oozes plastic for a few seconds to release the pressure and the print head is usually glued to the print during the process. If that connection is strong, then you cause it to pull on the model, when the head is rising to home. More important it can leave a plastic gunk ball and when the printer returns can bump into it.

      I never trusted these print recovery functions. At least on my glass beds they are no uses, as once the print bed gets lower 50°C the print gets loose and resuming will cause a failed print with wasting even more plastic. In three years I had a power outtake during printing once. It was just a two hour print, so not a big deal, but instead of adding a resume feature, I would rather buy new batteries for a PSU sitting for ages in my printer cabinet.

    • Ender5r
      Ender5r commented
      Editing a comment
      To help preserve spare batteries, get yourself a trickle charger and cycle through your spare batteries, changing to a different battery each month. You need 1 trickle charger for about every 6 batteries, because gel cell batteries will keep their charge quite well for 6 months. A good brand of trickle charger is Battery Tender.

  • #3
    This was printing parts for my lamps that I now need to make for everyone I know. Too bad it wasn't a business. I had successfully printed many times with the same gcode.

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    • #4
      The answer to power outages is a UPS. I use this one: https://www.amazon.ca/CyberPower-CP1...xpY2s9dHJ1ZQ==

      Please note: since you're in Canada, I went to amazon.ca 😁

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      • #5
        It is not like it is a constant problem but it does hit me regularly but I am not well funded. I have to very seriously think about whatever I do and how much it will cost and is it worth it.

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        • #6
          But I thank you for your input. When I lived in St. Barthelemy FWI it was of great concern power surges and I have actually felt them more here lately than ever in the last 20 years.

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          • #7
            I must add that lately even though we have one of the cheapest and best power suppliers in the world things have been happening and I have no idea why. My computer shuts off and I have to reset everything frequently. After 20 years here.

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            • #8
              Sounds more & more like you need a UPS.

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              • #9
                I would agree with you now but not in the last 19 years I've lived in this apartment that I inherited from my son. He and his wife lived here two years before me and our friend lived here before them. So it has been in the family for many years. I have never had such internet interuption in years as I do now nearly daily. I have no idea why.

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                • #10
                  Hydro Quebec is a really big company and it sells a lot of electricity to the USA. We should have free electricity in my view. But it has been very good at maintaining service. Quebec is 3 times greater than France. I had a transformer blow out in front of my place and we were something like 12 hours without electricity at =20C. But they came and changed the transformer while I watched them and wondered what I would do if they all screwed off home. But they did it. In my mind these guys are heros.

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                  • #11
                    I always use PS with the higher Wattage available to cover all power needs the printer or CNCMC's. If a PS "ages" , then the power it supplies is lower than printer needs to function properly. A proper PS is a must on!
                    Thinking simple is the hardest way.....

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                    • #12
                      If I were printing anything important and had more than one little printer I would agree with you. But I do not.

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                      • #13
                        Originally posted by roon4660 View Post
                        If I were printing anything important and had more than one little printer I would agree with you. But I do not.
                        Why? All electronics are Made in China and this means that expires sooner. Check the PSU.
                        Thinking simple is the hardest way.....

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