Unusual pattern of printing on CR M4

1

I tried a print yesterday on my Creality CR M4 and got the attached print. It did not work out. The filament did not stick to the build plate instead it was loosely on top.

IMG_5679
IMG_56793024×4032 2.44 MB

IMG_5680
IMG_56803024×4032 1.75 MB

2

Sure looks like too large of a Z offset to me.

3

What would you recommend for a proper z-offset? The base is a disk 8” dia and 2mm thick. I don’t know what would be good or bad for setting the Z

4

You want the Z offset to be such that the nozzle is just above the bed. The gap should be enough that you can slide a piece of paper between the bed and nozzle with just a little friction.

5

I did a -15 Z offset and the attached picture is what I got (right side) while I want to print what is on the left side.

IMG_5695
IMG_56953024×4032 2.58 MB

I am not sure just how far into the negatives I should go before I could damage the nozzle. Also shape on the right photo does not look like a rectangle.