look at pwmgen. http://linuxcnc.org/docs/2.3/html/man/man9/pwmgen.9.html it has a pwm up/down mode.
I have goofed around with it a bit.. http://www.youtube.com/watch?v=eUmFKOVepYY sam Ian W. Wright wrote: > Thanks Dave and Kirk for your suggestions, they are food for > thought. The little motor I have will be powerful enough for > the time being and runs at 10,000rpm - almost all the > milling I do is with cutters of 3/16 and under - mostly 1mm > or less. I won't be using the motor as the spindle - I have > a nice ball-raced spindle that I made with preloaded races, > and so I will be belt driving it at almost 1:1 ratio. I did > think I had seen a reference to just hooking the parallel > port to a FET but I couldn't locate the reference again and > I am a bit hesitant about getting high power so close to the > parallel port. I will probably try an H-bridge of FETs or > power transistors with some buffering between that and the > parallel port. Has anyone figured out how to output forward > and reverse PWM signals yet or a PWM signal with two other > pins giving a forward and reverse signal? I noticed one post > mentioning PDM - what's that? > Thanks, Ian > > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day > trial. Simplify your report design, integration and deployment - and focus on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.425 / Virus Database: 270.14.65/2502 - Release Date: 11/14/09 > 07:43:00 > > ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
