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Why does my printer suck so much?
(lemm.ee)
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this post was submitted on 16 Mar 2024
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OH!! Are you leveling with the bed and nozzle pre-heated? This is absolutely essential and so many guides don't list this as a crucial step. There's a shit ton of thermal expansion going on and you want to calibrate the space for the same conditions you're going to be printing in.
You're thinking of calibrating the Z-offset. A heated nozzle would have no impact on auto bed leveling.
Also, you don't calibrate the Z-offset with a heated nozzle. Thermal expansion is the reason you use a piece of paper in between the nozzle and bed.
I have the bed and nozzle when calibrating z offset and bed tramming and auto bed leveling.
What's the correct way for each of those?
When you’re calibrating z-offset you’re noting the difference between the probe and the nozzle.
So for that you want the nozzle heated but not the bed. Not that it hurts to have the bed heated. It’s just not needed.
Because the way you get the z offset is to find the point where probe triggers… and then find where the nozzle touches that same point.
For bed tramming you’ll want the bed heated. Although unless it’s badly warped you can get by without it and ABL should account for that anyway. What you want here is for the nozzle to be the same distance from the bed when it moves over it.
Here’s a series of comments I made for someone who was fighting issues that you might find helpful. They’re running Klipper but the mechanical adjustment and concepts should be the same.
https://lemmy.world/comment/7904011
Feel free to ask if you have any questions. I suspect you’re dealing with mostly mechanical variations which is common enough without dealing with the QA lottery you get with some printers like the ender 3