Re: are homed axes active and enabled?

["Keith Rumley" <dscadcam-at-yahoo.com>]

Till,

    I ran into something similar with my 3-axis STG2  & Emerson FX490 setup.
I could easily move the axes by hand, even when 'enabled', until a
'following' error occurred (MIN_FERROR). I tried emcpanel to set the output
voltages manually and had the same result. The proper distance did show on
the screen, however.
    Turns out that my amp has its' own logic, and was set to 'Analog Torque'
mode, where input voltage was interpreted as a torque value. I had P values
of 8,000 before it'd hold position, but it was obviously somewhat choppy! At
P=150 it would do nothing. (I even had it running at P=20,000)
    I had to change a setting on the amp (FX-490) to read the voltage as a
velocity command, and lower the P factor down to sane limits. It worked like
a charm. (Of course, this was after I spent hours scanning e-mail posts and
EMC code in vain!)

 HTH,

Keith


----- Original Message -----
From: "Till Franitza" <till.franitza-at-isw.uni-stuttgart.de>
To: "Multiple recipients of list" <emc-at-nist.gov>
Sent: Tuesday, October 02, 2001 9:51 AM
Subject: are homed axes active and enabled?


>
> Hallo Developers!
> Nobody had an idea about my message "running without moving". Now I made
> a new observation:
> any axis that is homed stops bein controlled. PID-Calculation seem to be
> stopped. Even the position is not updated in the display when i turn the
> axis by hand. still, the amplifier remains enabled. So, one solution is
> that the PID IS active, but the counters are simply not read. I was
> searching in the code but didnt find the solution yet. I will keep
> searching until i find out or until one of you tells me the solution.
> What is the difference between Enabled and active?
> Thank you!
> Till
>
> --
> Dipl.-Ing. Till Franitza
> Institute for Control Engineering of Machine Tools and
> Manufacturing Units (ISW)
> c.o. FISW
> Rosenbergstr. 28
> D- 70174 Stuttgart
> Germany
>
> phone: ++49 (0)711 22 99 2-28
> fax:   ++49 (0)711 22 99 2-22
> email: till.franitza-at-isw.uni-stuttgart.de
> web:   www.isw.uni-stuttgart.de
>
>






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