>> > The hardest part will probably be >> >finding out the right numbers to use for step length and direction hold and > >all those numbers that have to do with how fast your stepper drives can take > >>pulses. >Boy, you sure said what's true! I've been experimenting with those numbers >for a week now and I have the feeling it's getting worse... Apparently, EMC >is tuned for maximum stepper frequency, and I'm looking just about for the >opposite... >Peter Blodow
For most of the currently available simple stepper drivers, step length etc. is not a problem. they will work straight away with EMC2. Peter, Why don't you try starting again if you're having problems... rename your existing 'ini file' to protect it - open EMC2 and choose the basic stepper config from the menu. Now go back into your home/emc/configs folder and change the stepper file you have just copied into it to have a different name - now you can change the name of your original config back again.. Now, open the new .ini file in an editor like Gedit and change the values in all the MAX_VELOCITY and other XXX_VELOCITY entries to something like 1.5 and the XXX_ACCELERATION entries to maybe 2. Save the file and run it. Now if your steppers behave - but slowly, you can begin to re-edit the ini file and increase the MAX_VELOCITY gradually until the steppers begin to complain when you jog them manually.When they do, back off the values a bit and then begin to do the same with the XXX_ACCELERATION values.. Remeber that, when you get near to the limits of performance of the motors, higher speed needs slower acceleration and vice versa so you can fiddle about to get the kind of performance you are happy with. Always back off the maximum values a bit as when you put a load on the axes, the steppers may start to lose steps if you try to push them too hard. I find that editing the ini files by hand is much easier than using stepconf as I can understand what is happening and what I'm trying to achieve. YMMV... -- Best wishes, Ian ____________ Ian W. Wright Sheffield UK "The difference between theory and practice is much smaller in theory than in practice..." ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
