The manual says to the z-axis calibration: Via the menus run the bed all the way down to the bottom. I can move the bed to position Z: +280.0, but it is far away from the picture above. I have about 35mm between the bottom part and the bottom side of the table. On the picture, it looks like there should be only about 20mm. What am I doing wrong? I feel like the calibration manual is quite hard to understand and follow and my printer seems to do things which I do not understand some times. I'm sure there is a way to bring the bed further down, but how? Thank you very much for your help!