Cold nozzle. Headed bed. Find Z Height.

[walterlootk]

Something interesting. If you are using an unheated nozzle and a bed that is heated (say 95C) to find the Z height, consider this:

If you intend to run your print nozzle temperature at 220C, the resistance you feel when tugging the piece of A4 paper should be “medium tight”.

If you intend to run your print nozzle temperature at 230C, the resistance you feel when tugging the piece of A4 paper should be “somewhat tight”.

If you intend to run your print nozzle temperature at 240C, the resistance you feel when tugging the piece of A4 paper should be “very lightly tight”.

If you intend to run your print nozzle temperature at 250C, the resistance you feel when tugging the piece of A4 paper should be “touching tight”.

In a sense, what this means is that for every 10C difference, the actual heated nozzle expansion is about 0.050mm or more, depending on the material of the nozzle installed. I am using mostly brass type of 0.4 nozzles.

If you master this well on your nozzle you are using, your tuning/babystepping would be minimal, quick and easier to do.