On Sun, Dec 09, 2007 at 03:11:51PM +0100, Jes?s Bas wrote: > Sheldon, > > I'm suffering the same issue with my laptop Dell C610 and have also fixed > the SMI latency problem the same way. > Have you however tested EMC with your Dell laptop in a real machine? > Even with the latency issue resolved that way, I have not been able so far > getting my mill machine working properly. Moves are very erratic and making > a lot of rough noise from the stepper motors. > I was thinking about other unknown problems with this particular laptop but > now, looking to the emails in this list, there apparently are other > configuration issues with stepconf.
When I had similar trouble with a stepconf-generated config, the problem was the timing settings. My drives are L297-based, so I picked L297 on the menu, but I neglected to consider the schmitt trigger/RC filters on the inputs to the driver which make a much longer step pulse necessary. The timing settings MUST be right for your drivers to see the step pulses reliably. Stepconf generates "doublestep" configurations which allow a much faster step rate. That's nice but the trade-off is that people who have never had to worry about the timing requirements of their drives now have to, because things are happing much faster. Chris ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
