How to avoid nozzle from hitting the model?
It seems the problem was because of Z-axis leveling (level of the X-axis), I found out that the right side was more than 3-4&nbsp;mm below the left side when the Z-axis height exceeds around 8-10&nbsp;cm. Below 8-10&nbsp;cm, the two sides were even. I calibrated the X-axis by turning the eccentric nuts of the wheels and tighten them. I will try printing soon with some test objects.