hmm, but something with step and direction signals has only one half of the maximum step pulses per second than a quadrature output has.
Therefore my design takes quadrature output of EMC, puts it into QENC module of PIC18F4431 (The one I badly wanted back in 2002/2003) and that one does output microstepped - pure analog waveforms, the current regulator is boosted L165 as per datasheet, the supply voltage is provided by two 16V 100W modules SMPS (~30USD each.) The motors are a bit expensive Shinano Kenshi SST83D ... but still the fastest steppers from all I have searched in many years of research, and powerful.. ~10Nm, 160W in high revolutions. A bit more heat generated than it would be with VC CS/S SMPS, but I think it is not worth all that complication. On 1/8/07, Paul Fox <[EMAIL PROTECTED]> wrote: > colin wrote: > > Method 1 > > > > Using the parport config to send a step signal and a direction signal for > > each axis. Run these signals into a stepper driver chip which is configured > > for the stepper phase that I require. This method should leave a few extra > > pins on my parallel port to play with later. > > this is the way most parallel port EMC setups are done. > > > Method 2 > > > > Use the functionality of the stepgen module to perform the required stepper > > phase for each axis. Amplify each signal into the motor. This method will > > use up more parallel port pins depending on the amount of coils in the > > stepper that I purchase, I may even need another port if 5 phases is > > required. > > i have a small mill that works like this. it requires a small > shim driver to generate the correct phases at the correct times > for my motors. > > i'd say, if you're still choosing your hardware, to choose > something with step and direction signals. and, as someone else > said, consider buying something off-the-shelf that's already > known to be supported by EMC. (of course, your choice will be > dictated by how much you want to spend, and by how much time you > want to spend using your mill vs building your mill. sometimes > building is more fun than using. :-) > > paul > =--------------------- > paul fox, [EMAIL PROTECTED] (arlington, ma, where it's 38.5 degrees) > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
