the manual says there is a 116 to 1 gear reduction in each servo that run the potentiometer. :)
sam Jonathan Hancock wrote: > Hi Jim. > > I forgot to mention there is an index o/p from the encoders also. The > travel of the pots on the motors are geared to match the complete > range of the joint so I can use the far ends of the resistance range > for limits (or any point in between) and a centre point for homing. > > When I get a minute I'll post some more photos to help everyone get an > idea of what I'm talking about... > > > > ----- Original Message ---- > From: Jim Coleman <[EMAIL PROTECTED]> > To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> > Sent: Wednesday, 3 September, 2008 10:05:29 PM > Subject: Re: [Emc-users] Puma560 > > possibility of replacing the encoders with one with index? > > would there be enough room on the us digital discs to drill a couple > holes closer to the center for the purpose of limits? > > On Wed, Sep 3, 2008 at 3:44 PM, sam sokolik <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > Well that sucks :) my plan is to make some inexpensive h-bridges > and using one of the mesa cards we have to run it. 40v and a few > amps should be easy. I am very surprised that it is sin/cos. > Darn. I will keep tabs on this thread for sure . > > Thanks again. > sam > > Jonathan Hancock wrote: >> Hi all - just a quick update on my Puma project. >> >> As a thought, the output from the original encoders is a sin/cos >> waveform (to see goto >> http://www.flickr.com/photos/[EMAIL PROTECTED]/ ). I will try to >> convert this low level signal into a ttl level square wave using >> an op-amp. The encoder has a pair of leds and photo sensors in. >> >> I am looking at using a pic adc to gain limit and homing signals >> from the pots on the back of the motors. This is looking quite >> promissing. >> >> I've installed ubuntu and emc2 on my machine and now baffled! >> >> Jon - am I sorting the correct things out to interface to your cards? >> >> I'll keep you posted... >> >> Jonathan >> >> >> >> >> ------------------------------------------------------------------------ >> ------------------------------------------------------------------------- >> This SF.Net email is sponsored by the Moblin Your Move >> Developer's challenge Build the coolest Linux based applications >> with Moblin SDK & win great prizes Grand prize is a trip for two >> to an Open Source event anywhere in the world >> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >> <http://moblin-contest.org/redirect.php?banner_id=100&url=/> >> ------------------------------------------------------------------------ >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net <mailto:Emc-users@lists.sourceforge.net> >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win > great prizes > Grand prize is a trip for two to an Open Source event anywhere in > the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > <http://moblin-contest.org/redirect.php?banner_id=100&url=/> > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > <mailto:Emc-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > ------------------------------------------------------------------------ > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
