On 5 October 2011 08:05, Robert von Knobloch <b...@engelking.de> wrote:

>> That probably says XYZA. Change that to just XYZ and the A movements
>> will not be shown.
>
> But then the 'A' word doesn't move the chuck either. I would like just
> to get the display sensible, leaving the mechanism the same.

This is what the GEOMETRY setting does. It is separate from the
COORDINATES setting.

There are 3 semi-related settings in the INI file in the newer
versions of EMC2 (your version might not use all of them)

[TRAJ]AXES: This sets how far up the joints list we can go. This is
the axis.N.... pins in HAL. where the X-word in G-code is linked to
axis.0 and the W-word to axis.8. For reference the A-word controls
axis.3 and C controls axis.5. If you want to use the C-word then you
need to link axis.5 and that requires AXES=6. This hard link between
G-code and joint numbers is likely to be removed in the future.

[TRAJ]COORDINATES specifies which axis names are valid in the G-code.

[DISPLAY]GEOMETRY controls the preview display.

So, for your machine, using A you would have AXES=4, COORDINATES=XYZA
and GEOMETRY=XYZ
Using C would be AXES=6, COORDINATES=XYZC and GEOMETRY=XYZC (or maybe
CXYZ). This would also require HAL changes.

The full INI file docs for the current version are here:
http://www.linuxcnc.org/docview/html/config_ini_config.html
The corresponding doc for what I suspect is your version is:
http://www.linuxcnc.org/docview/2.2/html/config_ini_config.html

It is perfectly possible to upgrade EMC2 without upgrading Ubuntu,
maybe even through the package manager.

-- 
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"

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