On Apr 1, 2009, at 7:34 PM, Kirk Wallace wrote:
> On Wed, 2009-04-01 at 18:43 -0700, Dave Engvall wrote:
>>
>>
>> Am back from the beach and have tried things again.
>>
>> Finally found a fundamental mistake. 1525BR amps expect a
>> differential input; so battery boxes give the expected result.
On Wed, 2009-04-01 at 18:43 -0700, Dave Engvall wrote:
>
>
> Am back from the beach and have tried things again.
>
> Finally found a fundamental mistake. 1525BR amps expect a
> differential input; so battery boxes give the expected result.
> However, the dacs are ground referenced. After I fin
Len Shelton wrote:
> So, are you saying that it can't presently be done because no one has
> written the hal components to do it?
>
>
No, actually I do not believe any new HAL components are needed. You
need an and gate to detect when both home switches have been tripped.
This AND output set
Am back from the beach and have tried things again.
Finally found a fundamental mistake. 1525BR amps expect a
differential input; so battery boxes give the expected result.
However, the dacs are ground referenced. After I finally caught on I
wired the 1525 inputs with gnd to gnd and + dac t
Len,
steppers makes this problem very easy and it has indeed been discussed
before.
Searching on the term "two motors" I was able to retrieve a number of my
own posts about this.
http://article.gmane.org/gmane.linux.distributions.emc.user/8147/match=two+motors
is an older post describing a po
Thanks Chris and Kirk. EMC will load on my desktop with the change. Now
I'm headed out to the shop to see if I can make this work in the real world.
Thanks again.
Dean
-Original Message-
From: Kirk Wallace [mailto:kwall...@wallacecompany.com]
Sent: Wednesday, April 01, 2009 11:43 AM
To
So, are you saying that it can't presently be done because no one has
written the hal components to do it?
I have searched the archives and found very little.
FWIW - this machine uses steppers and no encoders.
>Len
-Original Message-
From: Jon Elson [mailto:el...@pico-systems.com]
Se
Len Shelton wrote:
> So let's say you have two drives, two motors, and two home switches on the
> same axis (gantry type machine). The problem with this arrangement is
> synchronization. The control needs to be aware of the two motors and needs
> to home both at the same time. While homing, we need
On Tue, 2009-03-31 at 22:04 -0400, Dean wrote:
> Kirk:
> That statement was already in my .hal file. But, I did comment out the
> 'motion.motion-inpos' line in the postgui.hal file and that did allow EMC to
> run. Thanks for the suggestion and I'll keep plugging away.
>
> Dean
>From Jeff's mess
Shabbir Hussain wrote:
> Is there any significant difference (in rapid moves) by running the machine
> with 7i43-P or 5i20?
The 7i43 and the 5i20 can both command movements of much higher speed
than any reasonable machine can move.
Really the only practical differences between them is how they
On Wed, Apr 01, 2009 at 02:11:34AM +, Chris Morley wrote:
> the pin motion.motion-inpos doen't seem to exist anymore
> try changing it to motion.in-position.
I made a note about this incompatible change on the wiki:
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?UPDATING
So let's say you have two drives, two motors, and two home switches on the
same axis (gantry type machine). The problem with this arrangement is
synchronization. The control needs to be aware of the two motors and needs
to home both at the same time. While homing, we need to bring both motors
towar
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