Re: EMC Problem

OK Fred, I'm rushing at this again, trying to do things before they are
ready but when I see posts mentioning things I want to achieve, I start
getting excited! You have confused me a little with talk on 'yemc' - is this
in the current release or is it something you're still playing with 'in
house'?
Is it likely that the 6 axis version will also properly support metric
units? As a further question, will it be possible to use the fourth axis in
a linear fashion or will it be tied to rotation in degrees? I ask this as,
even though I shall be using the fourth axis to drive a dividing head, this
will not operate in degrees but will be 'graduated' to accurately cut the
wheel counts encountered in watch and clock gear trains - that is, it will
have a 216:1 worm and wheel driven by a 200 step stepper motor which,
together, will give exact divisions of all the gearwheels I can ever imagine
wanting to cut for horology. Of course, this then makes programming it a
little unusual unless one converts the number of steps required for each
division into a linear distance when it becomes easy again.

Ian
--
Ian W. Wright
Sheffield UK

----- Original Message -----
From: Fred Proctor <proctor@...>
To: <CAD_CAM_EDM_DRO@onelist.com>
Sent: 27 September 1999 17:37
Subject: Re: [CAD_CAM_EDM_DRO] EMC Problem


> From: Fred Proctor <proctor@...>
>
> EMC users,
>
> Ian Wright wrote regarding 4 axes in the EMC:
>
> The xemc display program will only support 3 axes. The "yemc" program,
> which is an interrim test GUI we wrote, will display up to six axes. It
> was done to support the EMC on a hexapod machine. For example, in your
> .ini file, you can do this:
>
> [TRAJ]
> AXES = 6
> COORDINATES = X Y Z R P W
>
> to get the yemc to display 6 values, X-Y-Z-roll-pitch-yaw. W denotes yaw
> since Y is taken. In the COORDINATES entry you put whichever subset of
> these you want and the labels are set accordingly and the proper values
> are taken out of the controller and printed.
>
> Note that this is not suitable for machining centers, which use ABC
> format instead of RPW. Even with this obstacle, the EMC motion planning
> only supports Cartesian XYZ motion at this point, and the interpreter
> only supports XYZ.
>
> Summary: wait for full 6-axis motion planning, a G code interpreter that
> handles ABC format, and a GUI revision that displays all your axes.
> Estimated time of arrival is a few months.