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Level in corners ... but not in middle, where most gets printed

Discussion in '3D Printing' started by terrypin, 24 Jul 2021.

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  1. terrypin

    Associate

    Joined: 2 Apr 2021

    Posts: 41

    I spend a lot of time on bed leveling the glass bed of my Ender 3 V2, using a piece of inkjet printer paper so that there's some friction at each corner. But there always remains a slightly larger gap in the middle. It's also visible if I place a steel ruler across, with a light behind. Not much, about the paper's thickness, gradually decreasing on each side, but presumably enough to cause trouble?

    I eventually persuaded Creality to ship me a replacement but after a couple of months I've concluded that's the same, so must be a general problem?

    Q1: Do others (with any bed) have same issue?

    Q2: Why are most leveling instructions focused on the corners, where very little filament gets placed?

    Q3: Given that all my prints are quite small ( typically a footprint of under 100mm square, and often half that), should I always shift the model in the slicer (Cura in my case) from its central default to near the front left corner?

    To get as much feedback as possible on this long standing vexation I've also posted in Reddit's Ender 3 category. I hope that's OK?

    https://www.reddit.com/r/ender3/comments/oqn70i/level_in_corners_but_not_in_middle_where_most/

    Terry
     
  2. gitbags

    Hitman

    Joined: 17 Nov 2011

    Posts: 723

    Location: By the Sea

    I had this same issue with my e3v2 and following advice from other sources I ended up shimming the center of the glass with folded tin foil. It worked for me so it may be worth a shot. I also changed out the original bed clips for mini bulldogs in each corner to spread the clamping force across the whole glass plate.

    Ultimately though, I just bought a bltouch. Now I just check the level every now and again and let the probe sort the rest.
     
  3. ScoobyDoo

    Mobster

    Joined: 18 Oct 2002

    Posts: 2,664

    Location: Stoke-on-Trent

    I had loads of issues with the stock creality glass bed . I ended up purchasing a new bed off the rain forest , a Hictop
    Far better quality and dead level so first layer prints are top notch. Only trouble is they are currently out of stock.
    I was going to go down the bltouch route but read that quite a few people were having issues so didn't bother.
    Stuck with the Hictop bed, upgraded yellow springs.

    Also check out the ender3V2 on Reddit it only has ender 3 V2 users and I've found it more helpful than the ender3 sub
     
  4. Chaos

    Soldato

    Joined: 20 Oct 2002

    Posts: 5,451

    Your bed might be warped.

    This might be worth a try -

     
  5. terrypin

    Associate

    Joined: 2 Apr 2021

    Posts: 41

    Thanks for all the helpful replies.

    For now, I'm trying kitchen foil. bltouch sounds a bit too complicated, and one more thing to maintain. If I ever treat myself to a second 3D printer I will be in the market for a ready-to-run model with fully automatic leveling. Is there one yet on sale at a hobbyist price?
     
  6. gitbags

    Hitman

    Joined: 17 Nov 2011

    Posts: 723

    Location: By the Sea

    Only 2 that come to mind for me is the creality cr6-se and the anycubic vyper. Both around the £300 mark though. But I'd be amazed if any bed is truly leveling free.
     
  7. Joe Jones

    Gangster

    Joined: 11 Dec 2019

    Posts: 292

    Location: Cardiff

    Update your firmware to enable Mesh Bed Leveling.

    It'll take a probe of a number of spots on your bed (so a bit like the leveling your used to but you move the hot end instead of bed wheels) and it'll create a map of the build plate and it's deformities. It'll use this map to adjust the print head to the bed as it's printing and even it's way up after X number of layers.