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On my Creality Ender 3 v2, I have performed bed levelling and am fairly confident that the nozzle height is correct - a piece of paper under the nozzle can be pulled out with a gentle tug. For some reason, the first layer that prints always has the nozzle too far off the bed and so it's not adhering correctly.

I'm not sure if I've missed something with bed levelling, or if there is some other setting I need to tweak.

FYI I'm printing with a 0.8 mm diameter nozzle with 0.5 mm layer height and 0.45 mm initial layer height. When I look at the printer in action, the first pass looks like the nozzle is about 1 mm off the bed.

agarza
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Matthew Dresser
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2 Answers2

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I think there were two things wrong here:

  1. I was not levelling the bed correctly - I was manually moving the z-axis down to the lower limit - which can be slightly different to the printer lowering until the limit switch activates (Menu > Prepare > Auto home).

  2. Looking at the suggested answer Nozzle not level and first print failed I did check the position of my z-axis limit switch and it was pushed all the way downwards. I decided to try filing a bit off the notch which rests on the base rails so that the z-limit would be hit a bit lower.

Matthew Dresser
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You can check for offsets to the home positions. M206 will show home offsets. If you have automated bed levelling with probing there is another offset to view with M851. Depending on firmware versions you might have to run M503 to show all the offsets.

user9502176
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