I know this is an old thread, but I was hoping you could clarify something about the tramming procedure in the Wiki. The bed is trammed using the three knobs. All good so far. But at the end it says to tighten the knobs! Won’t that just undo what we just did?
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The procedure says:
“If at any point the bed leveling procedure needs to be repeated, ensure that all the steps are followed from the beginning of the guide.
The bed leveling knobs need to be tightened again, as instructed, before using the g-code file provided.”
It does not say to tighten the knobs after tramming, it say to tighten them before repeating the procedure. In other words, never start the tramming gcode without tightening the knobs first.
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Got it! Thanks for pointing out what I had missed. I appreciate it.
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If you don’t tighten the knobs before tramming procedure, after doing tramming a few times, bed will become loose and nuts will come off the screws,
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Yes – @ikraus explained that. I had misunderstood and I appreciate the clarification.
However, the Wiki would be less confusing if it said that “The starting position is where the end of the screws are flush with the knobs. Each time you begin the tramming procedure, make sure you are at this starting position before proceeding.”
“Tightening” seems to imply the knob is somehow locked into a particular position (say by a set screw) which is not the case. If the user doesn’t begin at the starting position before running the dummy gcode they have provided for tramming, the nozzle could crash into the build plate if its initial position is too high.
Anyone having Z-homing issues with the goodplate? It seems like if I let the printer sit for more than about 8 hours between bed leveling calibrations it tries to bring the bed up too high during the startup sequence and throws a z-homing error.
If I calibrate the bed leveling again then it prints fine for a bit… would REALLY love to get this working.
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Hi, I have Lodged a ticket and just found this Thread on the issue and am a bit concerned now 
I hope some people have a good resolve ?
What are my chances ?
I have joined this banana club now so it seems 
Whats a Simple do it myself fix if I can do one?
what is this good plate all about?
Tia 
While I am fortunate to have a good bed, I did come across the good plate and I ordered one to have on hand incase I needed it and wanted to go down that route. It seems straight forward with installing it and calibrating the unit once its installed. Overall the ordering process was simple and it got to me in decent time.
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Scroll up and read this thread from the start. You’ll find several ideas that might work for you.
I ordered my X1C January 31, 2023. I first began to read about warped bed issues a week later, so that was one of the first things I checked when my X1C arrived February 17.
Tested with a steel rule and a feeler gauge, the bed showed no gap anywhere parallel to the y axis. Any measurement parallel to the x axis showed a central dip, 0.76 mm lower than the edges. The curve was pretty smooth, the same front to rear, and symmetric about the middle, but a little steeper near the edges. I was not certain that this was a significant problem, and the comments here suggested that Bambu did not have a real solution at the time, so I just used the printer and waited to see what happened.
Most of my initial prints were small items and the curved plate had no real effect. Then I began to print larger items (150 mm wide) that would rock because their bottoms were not flat. Replacement beds were still being sent out with a warp. I placed my models with the long dimension front to rear, and waited.
Around the end of May, I began seeing reports here that users were receiving greatly improved replacement beds. I printed a thin test piece covering the entire usable bed, and submitted a detailed ticket, including the log.
The initial responses from Bambu support were just a stock answers that did not really address the problem. Manual tramming (which I had done before) cannot make melted plastic become flat on a curved surface, but I did it again anyway. They said my cold measurements were invalid because the bed flattens when warm (what about PLA on the cold plate?), so I did it again with the bed at 95°C. The dip became worse, 0.86 mm lower in the center. I sent them a video of the measurement. Indicator zeroed in the center:
They asked me to print a small cube so they could see a recent bed level mesh - I referred them to the log I had already submitted with the ticket. After a couple days for “engineering” to evaluate the log, they made arrangements to send me a new bed.
Bed replacement took me a couple hours, mostly because I was taking my time, and taking pictures as I took things apart so I could put them back correctly. I printed pictures from the wiki and glued them onto cardboard (see below). With holes punched by an awl, I put each screw in the cardboard at the correct spot as they came out of the printer, so every screw could go back into the same hole where it started. The 1.5mm hex wrench that comes with the printer lasted for about three screws before the ball end was worn out, you can grind it flat or use a better wrench of harder steel. The bed replacement is not a difficult job, just takes time and attention to details.
The new bed is not absolutely perfect. There is still a slight curve left to right, but the center dip is now only 0.07 mm, and I can live with that.
These two images can be printed on letter sized paper (ignore the duplicated screw position image)
You are all welcome.
Bambu bent bed BS continues.
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Can you please tell me how you got this height data?
Reference the Bambu Lab P1P/X1C Warped Bed Correction Plate. I could not find info on the plate weight at their web site. Any idea what that might be?
Slightly off topic. Where did you get the adapter to mount the dial indicator on the steel rule? I could not find it in Printables.
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Definitely email the manufacturer. I did as well this morning regarding the same thing.
It was just something I made real quick with Fusion 360. If I did it right, you can get it at Dial Indicator mount and rule support by LeroyK - Thingiverse. I included the Fusion 360 files, because though they work, there is room for refinement.
Since I needed a picture anyway, I re-measured my new bed after several weeks of use. Looks like 0.002-0.0025" of warp, edge to center, which is about 0.05- 0.06 mm, or about what the Correction Plate promises. If you have a badly warped bed, it’s probably worth the effort to at least try a warranty replacement from Bambu first.
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The real question is, how many of you bend your plate to get stuff off of the plate?
I saw some of this before I bought the machine, but if I need a flat surface I’ll just toss a piece of glass on. I like to bend my plate.
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Hi Ikraus,
Thanks for the reply and model link.
FYI, when I just do a search for “Dial Indicator mount and rule support” this is the only thing that shows up. So people may be missing out on your design.
I ran warp tests a few months back using a feeler gauge. Painful but it did the job. I’m thinking of the aluminum tape solution and your mount will speed things up.
My bed is relatively flat in the majority of the working area. Like yours, it curls up on the outside edges, but past the point where the bed leveling measurements are taken. So bed leveling does not help and it won’t show up in the log files. The worst case is about 0.3mm higher from the last measurement point. Enough to mess up first layer quality on the outside edges of the plate.
I use a glass plate when I have to print across the entire bed. But it is heavy (800 grams) so I only use it when necessary.
I submitted a suggestion to Bambu to expand the test points to take in the outer areas.
https://www.reddit.com/r/BambuLab/comments/13c4yji/suggest_expanding_the_bed_leveling_test_area_in/
Thanks again
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Sorry, apparently I saved the “thing” but did not publish it.
The link above worked in Edge, Chrome, and Firefox (no Thingiverse history or cookies), but now a search at Thingiverse for “rule support X1C” should also find it.
@kungpaoshizi That would make the center higher than the edges.