Issues zeroing my shapeoko 4 standard

Hi, I’m having issues with zeroing the machine, and also trying to use the bitsetter. The Z axis doesn’t go all the way down, stops short
Please check my FB question with all the videos and photos
https://www.facebook.com/100078438255196/videos/735771608138671/
Your help will be appreciated
Thanks

Which Z-axis have you configured your machine to have.

Do you have a BitZero? Where is it, where is the ground lead? What colour does the BitZero show?

What colour does your BitSetter show?

If you power up and connect to the machine, what shows under Active Inputs?

Please write in to support@carbide3d.com

I’ve a bitsetter, and the ground lead is where is supposed to be, on the screw behind the controller box to the base.
I’ve set a Video support for tuesday. Thank you for your help