I was able to get the steppers working pretty well by inverting the step signal, and by increasing step to 2000us instead of 500 (works MUCH better).
What sort of additional value might be needed to adjust for the opto isolators on the BOB? - Michael On Apr 6, 2009, at 6:39 PM, Stephen Wille Padnos wrote: > Michael Jones wrote: > >> Hi all, >> >> I'm currently running a small parallel port converted D&M4s mini mill >> (with a Campbell Designs BOB) on the demo version of Mach3. I'd like >> to try out the alternatives before putting out the money for Mach3 so >> I'm in the process of installing EMC. >> >> I've run the latency test, loaded I'm getting around 14200 unloaded >> about 8000-9000ish. Everything looks good there. >> >> When I run the stepconf wizard I allow the system to decide the step >> settings for the L297 configurations. When I get to the "test this >> axis" step, nothing moves. I can watch the lights flash on my BOB, >> but no information seems to get to the Steppers. I don't know who >> makes the steppers on this machine or what their specs are so I'm >> kind >> of in the dark here. I'm assuming that I have an issue with the >> step >> length setting, but where do I go to diagnose exactly what I need to >> plug in here? Do I just want to shot gun it? Take a wild guess and >> start increasing the numbers until they work? >> >> I can also activate the limit switches, hit E-Stop, turn the spindle >> on and off, etc from within Mach3 so I know I'm getting >> communication.. just no Stepper movement. >> >> Any assistance would be appreciated. >> >> > If you have a working Mach config, you should be able to look at the > ports and pins settings there (I think that's what it's called), and > make an EMC2 config that looks the same. > > There are several possibilities as to why you don't get any movement - > things like not enabling a motor enable output to the drive. The > scale > and acceleration could be wrong (though I'd expect at least some > vibration in that case). Step outputs could need to be inverted, or > the > step lengths may be completely wrong - again, look at the Mach config > and use the same parameters for the EMC2 config. > > The L297 timing is for directly connecting to the chip. If there's > anything else in the way (like the optos on the BOB), you may need to > change the timings. > > - Steve > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by: > High Quality Requirements in a Collaborative Environment. > Download a free trial of Rational Requirements Composer Now! > http://p.sf.net/sfu/www-ibm-com > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
