On 4 October 2011 10:04, Robert von Knobloch <b...@engelking.de> wrote:
> mounted with its axis of rotation vertical (parallel to 'z').

> The axes are x,y,z & a.
> Now I think that the fourth axis should logically be called 'b', but emc
> won't accept this parameter, it refuses to start.

It should conventionally be "C" (A is parallel to X, B is parallel to
Y, C is parallel to Z)

You control which axes are enabled with
COORDINATES = XYZA
in the INI file. If you want to start using C then you would need to
edit that to XYZC, but to also add 2 more axes and alter the HAL file
to send axis.5 values to the stepper motor. I think you are probably
better staying with the XYZA configuration (it means all your G-code
continues to work).

If you want to stop changes in A value moving the tool in the preview
display then all you need to do is edit the INI file GEOMETRY setting.
That probably says XYZA. Change that to just XYZ and the A movements
will not be shown. I think this is only valid in EMC2 version 2.3
onwards which I think will work on 6.06, but I am not sure how you
would upgrade.

If you want to Show rotary axis movements correctly then I think you
need to change the number of axes (AXES=6), change the HAL file to
connect axis.5 to the stepper, change GEOMETRY to CXYZ, change
COORDINATES to XYZC, edit all your G-code and, to avoid displaying
non-valid A and B axes, also update to a newer version of EMC2. Much
easier to continue using A.

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

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