On Feb 13, 2012, at 7:29 AM, Viesturs Lācis wrote: > > In wiki I did not see any file for a diagram, but HAL file comment says: > # Define Singals (see block diagram for comments) > I see you found the logic diagra.
> > 2) I have another 2 questions about the servo motors. Do I understand > correctly from the link in wiki page that You have brushed DC servo > motors? And what is approximate travel distance on x and y joints for > a full turn of motor? Yes, they are brushed DC servos. We talk about the distance in the Motors section. We have the Keling KL-34GH101 10:1 gearboxes on the X and Y joints (http://kelinginc.net/CNCGEARBOX.html) with a 2" diameter pinion gear. 1 rev moves the truck 0.6283”. > > 3) Any particular reason to run the servo drives in step/dir mode? In > Granite Devices homepage I see that the drives accept also pwm signal, > which can be created in Mesa card just as easily as step signals. We started with step/dir on the Geckos and since the Granite's accept that we just stuck with it. We had some issues with noise and tuning that may be related to using step/dir and at one point I was tempted to try PWM but it just never happened and we worked out our issues. I am curious about it, but not sure if I am curious enough to spend the time. Perhaps at some point in the future... > Thanks and congratulations on finishing such a nice and pretty > sophisticated project! Thanks, Tom ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
