Re: anyone using 4th axis ?

[Ray Henry <rehenry-at-up.net>]

Jon

The refresh on tkemc is set to 0.2 in the default .ini.  I run it at 0.1 on
my setup and it seems to work fine.  It is labeled cycle_time under the
display section.  I got it messed up once because there are two cycle_times
near each other.

I haven't run a 4th. The RS274NGC paper says that the interpreter and
motion planner will accept commands for a 4th. as B words -- but it doesn't
work for me.  

Tkemc only computes position display for three axis.  I did the same
playing with xemc and yemc and tkemc that you've tried there.  I can fix
tkemc for a fourth display whenever you need it.  The size of position
display letters just needs to be a little bit smaller, or the screen area a
little bigger and add the computation and emc_update stuff within tkemc.  

We'll have to get Fred to explain what we need to do for the interpreter
and motion planner.

Ray


At 01:16 AM 12/31/1999 -0500, you wrote:
>Hello,
>
>I have finally upgraded to the latest EMC (20-Dec-1999) and have
>been trying a few things.  The biggest problem I had was that the
>sense polarity of the limit switches seems to be working backwards
>of what I had before (or else, the old version of EMC was ignoring
>the limit switches, which could be).  Anyway, once I got those set
>right, both xemc and TkEmc user interfaces worked fine.  I notice
>the TkEmc updates the screen a bit slower than xemc - not a big
>problem.
>
>But, I'm looking at adding a rotary (angular) axis to my 3 linear axes.
>I added the block of info for the 4th axis, as well as specified 4
>axes, and their names, etc.  I tried xemc, TkEmc and Yemc.  The
>first 2 totally ignored the 4th axis, but Yemc left a blank space
>under the Z part of the display.  That was as far as it got.  I was
>hoping that all the work that had ben done to emc was going to
>bring a 4th axis closer to working.
>
>Has anyone else been working on a 4th independant axis?