I'm confusing about the hotbed levelling of my Ender 3 V2.
The step I take to level my hotbed is:
- raise the temperature to 65 Celsius degrees (which is also my first layer printing temperature)
- wait for 20 minutes to heat the hotbed thoroughly
- level the bed by adjusting the springs
It works fine for printing. After the print, I need to cool down the bed to 28 Celsius degrees, which allows me to remove the printing objects easily.
However, due to the expansion and contraction of the hotbed springs and screws (and maybe other stuff), even if I re-heat the hotbed to 65 Celsius degrees, the hotbed will be slightly different from the previous levelling, and I might need to re-level it.
This situation is confusing me. Is this normal for everyone, or is my printer has some qualification flaws? If it is normal, is there a way to mitigate this situation, or the only thing I could do is to keep re-levelling?