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  1. Well, I solved this on my printer. First, I had to totally re-align the 2 bed rails. They were not even and not perfectly straight with the frame. But that isn't what fixed the shift. What fixed my shifting problem and still being able to user higher print speeds (50-60) was to to into Cura and open up ALL the Acceleration and ALL the Jerk options. For acceleration, my first test was to just put all the numbers down to 800. They were all at 3,000, except one that was at 5,000. Then, for jerk, they were all at 20 so I put them all at 8. Before doing that, on a test build, I sliced to see the time. After the changes to settings, I sliced again to see that time. To my great surprise, the times were almost the same. After settings added, maybe 1-2 minutes! Well worth it. Now, SO FAR.... I've not had another shift. As for replacing the motor, sure, perhaps a bigger, "better" motor could handle it. But the motor on mine is already very big. It makes sense that a motor, having to move a heavy bed with a glass on it, being jerked and accelerated FAST like that, is going to slip. I hope someone, who is having this shifting issue, tried the above and reports back. Also, if after doing this, you find blobbing, just increase the jerk by 1 and acceleration by 50 and test. Repeat until you find that sweet spot. I only mention this because I read somewhere that too low of these number can cause some issues like blobbing. To date, I've not had any of that. The prints are FINALLY looking great and nice and solid. Sure hope that helps.
  2. Now months later and the problem is worse than every. If only I could go back and never buy this P.O.S. I replaced its glass texture hotbed with a thinner and lighter one. The orig. plate is like 1.8kg while the replacement is only 1.3kg. It works fine if I slow the print speed down to a crawl. But today, I started a print that seemed to be doing pretty well. I monitor my printer with a camera that I can access away from home. Well, the print shifted 3 times!!! So I flipped over the machine and checked tensions and such. I did notice that the 2 alignment screws where not set right, so the belt would ride on the edge of the roller and the gear (on the stepper). So I've adjusted that. The tension seems fine. I did tighten the screw on the gear that's on the stepper, although, that wasn't loose, really. The ONLY other thing that I"m suspecting and this is from day 1, is that the 2 Y axis rails are not 100% aligned. This bed has 8 rollers, 4 for each rail. There are 2 screws that adjust each side to balance off the tension on the rollers on each side. But on one side of both, even backing off the screws to where they are loose, the 1 or 2 rollers remain pretty tight. That indicates to me that from factory, it was never aligned right. I'm kind of afraid to try to loosen everything up, maybe even take the rails, rollers and bed right off and try to put them back perfectly aligned. I'm afraid that I'll make things worse. I'm about to start the printer over with new slicer settings. Slowing things down a lot. What was supposed to be about 12 hours to print is now going to be over 24, due to the slowed down slicing. We'll see. I so wish that I did not buy this Wanhua Duplicator 9 400 MK2. I do hate the thing.
  3. DidierKlein: I'm also new and notice that my comments need to be approved first. However, I just made a comment and of course, it says it needs to be approved, but I have commented before and it appears there has been no approval (unless I'm just not seeing it) as in my account, it says nothing is there. How do we newbies know when we can start to comment immediately? I'm assuming (and I could be very wrong) that the approval thing is for new people for a time period so that the company gets to know that the person isn't a trouble maker but a true member. That's what I suspect, but who knows!? :) Would you please be able to enlighten me on how long before one can comment without waiting for approval or if we need to do something differently to progress to the point of no approval necessary? Thanks in advance.
  4. Today for the 1st time I had a Y axis shift at about 50% of the print. It was not like these pictures where it's gradual. It was literally, 0 to 49% correct, then BAMN! The next layer, say 50% started over about 20mm or so! All the build is, is just an end piece for a 2x8 piece of wood. It's designed in Fusion 360 is is nothing more that a rectangle that is (using parameters) just slightly over the size of the wood. It's only filleted. Other than that, a rectangle that is about 30mm "deep." Nothing special at all. So, I sliced it with Cura using "Draft" option. Pretty much kept defaults. I sent it to the printer and the above happened. I have had this before, BUT in that case, it was the print itself lost adhesion and actually moved. In this case, it was solid. The ONLY difference with this build and others I've done, was printing in Draft. This was the first time. Ok, so I thought, perhaps that's the issue. I re-sliced in "Normal", again, using mostly defaults. Just some temperature differences. This time, it's printing just fine. As for the printer, there is no issue with any belts, rollers, rails, drive gears, nothing. All nice and tight as they should be. I'm just throwing this out there in case this affects someone else. If you are printing in draft, perhaps try normal.
  5. I first has auto slicing enabled. Randomly, after changing any number at all, it would say "unable to slice", but after a few seconds it would just go ahead and slice. I then changed from auto slicing to manual. Then I noticed that again, the random "unable to slice" message would happen as well. Again, changing any number, even layer height.. .anything. But not every single time. Then I noticed if I made a change and clicked the Slice button, rather than the area changing to indicate it's going to slice, it just stayed the same. So one would think the button didn't press and therefore, we'd press again. This almost always caused the "unable to slice" message. Again, it would pause for a few seconds then start to slice without an issue at that point.
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