External offset problem

I have a problem with external offsets in that my simulation of the zwp demo works fine but on my machine, with the same external offset setup, it
does not work. The  axis.z.offset and axis.z.offset-request values remain zero on the machine, but in the sim they change as required and the z-axis move-off functions.

Attached are screen shots of the eoffset pin settings and pyvcp controls (same as used in the jwp sim config). The ini file has the required 
OFFSET_AV_RATIO = 0.2 line for the z-axis. the files starting with mm is for the machine, and the files for the sim start with sim.

Is there any other control pin that needs to be set for eoffset to work on a real machine?

 

I forgot to mention that I am using lcnc 2.8.4 with trivkins and that the machine is on and homed and in a paused state on a path of a simple gcode
program. In this paused state I can enable axis.z.eoffset-enable and increment axis.z.eoffset-counts, but with no effect on axis.z.eoffset.

on a very quick look, From your hal file, it looks like eoffsets are only enabled when the machine is paused. MAybe eoffsets are not enabled in this state.

Yes indeed I want it to work only if the program is paused. It works perfectly in the
jwp sim example, and I use exactly the same pyvcp panel and associated hal file
from the sim example. But on the machine it seems not enabled to move the z-axis even though the scale factor and count is correct.

is there anybody that can direct me to the source or component that handles the eoffsets. Perhaps I can find out what the conditions have to be to enable the jwp
function.

I found the problem: I have a 4th axis on the machine that I want to use the jwp function on, and out of habit I seldom home the 4th axis - it does not normally seem to be necessary.

However, jwp with external offsets need ALL axes homed before it will function.