You might try hanging a current probe on the output of the Gecko to see if it is switching between run current mode and standby current mode when the direction line is being toggled. It shouldn't cause any harm, just more power used.
Ray --J. Ray Mitchell Jr. [email protected] (818)324-7573 "Normal people ... believe that if it ain't broke, don't fix it. Engineers believe that if it ain't broke, it doesn't have enough features yet." -- Scott Adams, creator of Dilbert comic strip On Sat, Feb 22, 2014 at 12:20 PM, Dave Cole <[email protected]> wrote: > Damage the Gecko?? > > That is extremely unlikely. > > If it is not going into standby your motor might get hot, but if you > have the Gecko properly heatsinked there should > not be an issue with it. > > Dave > > On 2/22/2014 2:57 PM, Mark Tucker wrote: > > Thanks > > That seems to have nailed it for me now i can very clearly understand > > why no pulse is emitted on the pulse line. > > Well that brings us back to the question of who is going to fix the > problem? > > Is there anyone else working on this other than charles that can maybe > > work around this using the stepgen velocity mode and deadband etc in Hal? > > I am a little worried about using it on a daily basis just in case it is > > damaging the Gecko. > > I will maybe see if i can get an explanation on one of the Geckodrive > > haunts. > > > > On 22/02/14 19:30, Peter C. Wallace wrote: > >> On Sat, 22 Feb 2014, Mark Tucker wrote: > >> > >>> Date: Sat, 22 Feb 2014 19:20:57 +0000 > >>> From: Mark Tucker <[email protected]> > >>> Reply-To: "Enhanced Machine Controller (EMC)" > >>> <[email protected]> > >>> To: "Enhanced Machine Controller (EMC)" < > [email protected]> > >>> Subject: Re: [Emc-users] Crackling motors using Beaglebone > >>> > >>> John > >>> > >>> Thank you so much for the insight of how that work and it explains a > lot. > >>> But as you stated it would be hunting back and forth.Which i assume it > >>> would have to pulse the step line? > >>> And a number of people have scoped the outputs and only found the Dir > >>> line hunting back and forth,i wonder why it is not detected on the step > >>> line.? > >>> And if it is only the dir line,why would the motors make a noise at > all? > >> The internal stepgen position has a resolution of a small fraction of a > step > >> (1/10000 of a step in Johns example) so it can hunt back and forth > without > >> emitting a step. > >> > >> As to why a step drive pays any attention to the dir signal without a > step > >> pulse I do not know, seems like a mistake to me. > >> > >> > >> Peter Wallace > >> Mesa Electronics > >> > >> > ------------------------------------------------------------------------------ > >> Managing the Performance of Cloud-Based Applications > >> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. > >> Read the Whitepaper. > >> > http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk > >> _______________________________________________ > >> Emc-users mailing list > >> [email protected] > >> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > >> > > > > > ------------------------------------------------------------------------------ > > Managing the Performance of Cloud-Based Applications > > Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. > > Read the Whitepaper. > > > http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > Managing the Performance of Cloud-Based Applications > Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. > Read the Whitepaper. > > http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
