BL touch trig height in “web UI console” vs “web UI top left”

[Johncoffee]

I'm wondering why my trigger height reading from the web UI console window is sometimes different from the Z height at the web UI head position reading (top left in DW screen)

Any explanation?
What reading is now correct?
I've repeated the shown example twice - both time the same readings.
See below:

0_1563050411703_rmv2 2019-07-13 22-35-11.png

[deckingman]

@johncoffee I don't use a BLT touch but my best guess would be that the difference is the Z offset.

[dc42]

The "stopped" height is the machine Z coordinate. The displayed height is the user Z coordinate. The following all cause the two to be different:

• A G10 Z offset for the current tool
• Baby stepping (send M290 to see if any is in effect)
• Bed compensation (send G29 S2 to cancel it)
• Workplace coordinate offsets

[Johncoffee]

@dc42
This answers my question. Thanks a lot for your detailed explanations!