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Z-Offset What Is It?
The Z-offset is the distance in mm from where the 3d printer thinks 0mm is from the bed. If you move the z axis to 0 and take a look, there should be a small gap below the printer tip. This is the Z-Offset.
I will explain how to do all of this on and Ender 3 with a CR Touch installed.
How to Set The Z-Offset
Setting the Z-offset through the menu is straightforward. It is a good idea to manually level the bed with the adjustment screws in order to get the best starting point possible. Once this is done send the printer to “Home”.
If you look on the screen, the printer will be about 10mm above the bed. Go into the settings under “Move Axis” and move the Z axis to the 0mm position. This is where the printer thinks that “0” is at. You should be a couple of mm above the actual printer bed.
Now Go To “Bed Leveling” -> “Probe Z-Offset” and slowly move the printer head down so that 1 piece of paper starts to get snug. Your display should show a negative number.
Store The Settings
At this point you need to store this value into memory to that the printer knows how far down it needs to go to get to the bed. On the same menu, move your cursor down to “Store Settings” and press it. You should hear a beep. This will save the value. You should not have to adjust this unless somethings changes, such as moving the bed leveling screws.