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So I just got the CR-10S and there was no mention in the instructions about making the 2 Z axis lead screws equal, or rather in sync, with each other. So videos of other machines show you manually turning the lead screws until the Z carriage bottoms out on two measurement spacers, one on each side of the carriage.
If this not necessary on this machine?
This video may be helpful:
https://www.youtube.com/watch?v=ubZMG_1PK20
Hello;
I do auto home, lower Z-Axis to the a set distance height, disable steppers move the nozzle around the bed checking that 4 corners are the same distance adjusting the bed leveling screws.
Bed level close enough - then I use auto bed leveling to correct for any bed warping.
Thanks. I ended up using my digital dial calipers and then leveled the bed. Close enough. Prints come out great so far. Working with PETG now, so we'll see I plan on making the holder for the dial gauge for premium accuracy.
The last time I leveled my bed was so far back I cannot tell you on what day of the week it was on.
I have a thumb screw adjuster on the Proximity sensor, and the four thumb screw adjustments for the bed.
I use a non standard piece of paper as my measuring tool, the receipt side of my payroll checks.
If it will slide under the nozzle at the Z-Axis lowest point bed is close enough to level. Then I use Auto Bed Leveling Bi-Linear on a 4 X 5 grid.
I save the Bed leveling Data using M500, and in my slicer G-Code i add "M420 S1 ; Bed Leveling On" after the last G92 in my Startup G-Code restoring my bed leveling data.
And unless "I" really mess up the bed is level for a couple of weeks and dozens of prints.