Newbie, How to touch off Z axis

I have just compiled emc2-2.4.6 in simulator mode and I homed all axis. When running, a message is displayed:

[Yellow !] Program exceeds machine maximum on axis Z

I clicked 'Run anyway' button: some messages are displayed

"all joints must be homed before going into coordinated mode"
"can't do that (EMC_TASK_PLAN_RUN) in manual mode"

Source axis.ngc indicates "To run this code anyway you might have to Touch Off the Z axis"
but after hagin homed all axis, touch off button remains disabled (dimmed).
I cannot find out how to touch off Z axis.

Thanks in advance.

Marco A. Cruz

OK, I tried to do what you indicated but:

- Is th Z axis the Joint 2?
- Z axis is not selectable anyway, or at least, it is not evident how to select it in the GUI.
- I hit PgDown and the Joint 2 gets more negative with each hit, is it correct?
- Touch off button stays dimmed, disabled.
- All this should be done after or before homing all axes? or just Z axis?

Disclaimer accepted but at least, the GUI could be more intuitive.

I made:

---

./configure --enable-run-in-place --enable-simulator --enable-build-documentation

make

---

I works fine after building it.

OK, I am doing the following (according directions previously posted):

1. I start EMC2 up.

2. Toggle Emergency atop [F1]

3. Toggle Machine Power [F2]

4. Press [PgDn] a couple of times to move Joint 2 to a value (-10.6576)

Result : [Home All] button stays enabled; [Touch off] button remains disabled (dimmed)


How can touch off Z axis?

Does Emc allow touching off before homing? If the home all is available, and the steps taken seem to lack the home step, I'm guessing you need to home first.