Newbie looking at 6040 (China CNC) for polypropylene 15mm sheet

[JOGARA]

Not sure what is going on here.

I have not used the machine in a few days, like 5-7 days.
When I go to home all the axis the Z does not stop when it hits the end stop.

Forgot how I fixed it last time it did this about 1.5 weeks ago.



Also, sometimes when I set my part offsets and then tell it to go to the part's zero, the Z will go about 5-10mm below the set Z. I then tell it to go to zero again and it lifts Z to the correct height.

[edit]
Why is it also normally open? Would have thought NC would be safer?

[edit2]
Gone into diagnostics and all but the Z axis limit switches are working.
The switch its self is working so guessing cable problem.

[edit]
Yea it is cable..