RE: Angular axes

[Chris Wagner <clwagner-at-eecs.wsu.edu>]

On  3 Jul, John Guenther wrote


> 
> Hi Chris.
> 
> I have determined this evening that it does not seem to make any difference
> whether the axis is configured as LINEAR or ANGULAR it just plain does not
> work at any reasonable speed with the INPUT_SCALE and OUTPUT_SCALE set to
> any thing less than 1000 steps per unit. It also appears to totally ignore
> the UNITS parameter on the fourth axis.  You are correct in that if the
> fourth axis is configured identically to the other axis it will work at
> reasonable speeds but you cannot tell it to move say 90 degrees other than
> by decimal numbers such as g0 a0.25 will get you a 1/4 revolution move.
> This is not how I want to use my rotary table.  Oh well, I am sure it will
> get fixed sooner or later.  Maybe I will have to brush up on my C skills and
> fix it may self, which is NOT what I want to do.  I want to build engines,
> not fix software.
> 
> John Guenther
> Sterling, Virginia
> 

Hi John,

I agree, the ANGULAR/LINEAR is not the problem (I also tried further
tests with TYPE=ANGULAR).  I think you are right about UNITS not
working on the fourth axis.  Furthermore if I have LINEAR_UNITS=0.039...
in TRAJ *all* AXIS section UNITS don't seem to matter.  I think this may
be the root of the problem "UNITS" does not work as expected.  So a
"different" axis can't be configured as needed.  I was not suggesting
that my fast-running setup was useable, just that emc was capable of
clocking all 4 axes at a reasonable speed.  We just need a way to get
the correct setup into emc...

-- 
Recreational Calculus - Just For Fun!

Chris Wagner
clwagner-at-eecs.wsu.edu