On Sat, 17 Jan 2015, Andrew wrote: > Date: Sat, 17 Jan 2015 18:34:50 +0200 > From: Andrew <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Subject: Re: [Emc-users] MESA 7i87 support > > 2015-01-17 17:42 GMT+02:00 Peter C. Wallace <[email protected] > <https://mail.google.com/mail/u/0/?view=cm&fs=1&tf=1&[email protected]>>: > >> >> all sserial remotes work with linuxcnc >> >> > Great. Thanks! > > BTW what is possible software PWM frequency on GPIO outputs on 7i76, 7i77?
pretty slow since they are only updated at the servo thread rate (say 1 to 5 KHz) On the 7I76, If you need PWM and you are not using all 5 step/dir pairs, you can use the step/dir outputs and a custom config that includes hardware PWM generators wired to these pins. Also if PFM (Pulse frequency modulation) will work you can get that out of a stepgen directly (set the step length to say 10 usec, the step space to 0 and use the stepgen in velocity mode) now setting the velocity from 0 to 100 KHz will give you 0 to 100 % duty cycle You can also use the serial exapnsion port on the 7I76 or 7I77 for PWM out if one channel is enough (thsi requires a custom configuration) > > -- > Andrew > ------------------------------------------------------------------------------ > New Year. New Location. New Benefits. New Data Center in Ashburn, VA. > GigeNET is offering a free month of service with a new server in Ashburn. > Choose from 2 high performing configs, both with 100TB of bandwidth. > Higher redundancy.Lower latency.Increased capacity.Completely compliant. > http://p.sf.net/sfu/gigenet > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
