i was finding every time is changed the filament the Z Axis went out of line (took me a while to figure this out) so now i reset the Z Axis level every time i change the filament

this very simple tool makes it easy to setup the dual Z Axis motors on the ANET A8 or others with a similar dual stepper Z Axis system

you will need to print 2 of these tools

process is

1:- turn off the stepper motors,
2:- manualy move the Z Axis up to allow you to slip the two tools around the 8mm guide bars

3:- manually lower the Z Axis until it touches the tools,

4:- then raise a fraction (same amount both sides) so the tools can be romoved
5:- home the Z Axis

your Z Axis should now be level and you can level the bed

ANET A8

Doesn't Matter

No

used this to start to learn freecad, this is the first thing I have designed myself and printed