Axis on 2.7.15 touch off and tool touch off problem

Hi.
I have done this maybe a thousand times but for some reason I cannot get it figured out this time.

On a new milling machine retrofit I have the following when setting up tool offsets for a job with two tools. No 1 and no 2.

I open the tool table and set tool 1 z offset value to 0. Save and reload tool table.

I then load tool 1 with m6 G1 g43h1 and jog to touch the top of my workpiece. Use touch off button in g54 and make z 0.00.

Then I load tool 2 with m6t2g43h2. Jog to touch top of workpiece and use tool touch off button to set z=0.

What I expect: current z readout would change to 0.

What happens: z readout changes to -244.something....

I think I tried everything and I don't know what im missing. G54 was set and still set after this process.

Any idea what im doing wrong?
Thanks
Henk

Thanks Tommylight
I did not know that.
Although I did also try issuing a g49 and g92.1 before this.

"what to do when you get stuck" or similar.

Sounds like this;

3. So if you're lost, what should you do
Having trouble getting 0,0,0 where you want it for your gcode Start by getting rid of all the sources of offsets

Move to the machine origin. MDI G53 G0 X0Y0Z0 (A0B0C0)

Clear the G92 coordinate offset. MDI G92.1

Use the G54 coordinate system. MDI G54

Set the G54 coordinate system to be identical to the machine coordinate system. MDI G10 L2 P1 X0Y0Z0 (A0B0C0)

Turn off tool offsets. MDI G49

Turn on Relative coordinate display from the menu

now, you should be at machine origin (0,0,0), and the relative coordinate system should be the same as the machine coordinate system. You can now set your origin on the material.

wiki.linuxcnc.org/cgi-bin/wiki.pl?CoordinateSystems

I have done all the above but that didn't solve the ptoblem.

In the end, I noticed that touch off to fixture was selected in the machine menu. Changed this to touch off to workpiece and it seems ok now.

Never used that option before so it didn't occur to me to check that....in fact I didn't even know about that option.

Henk