On Sat, 2012-12-15 at 21:23 +0000, Ben Potter wrote: > > -----Original Message----- > > From: cogoman [mailto:[email protected]] > > Sent: 15 December 2012 20:55 > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] LinuxCNC documentation in russian > > > > I work with a CNC machine that uses an old Bandit controller. Even > > though it doesn't do any heavy lifting (all 2d work), sometimes we > > overflow the 512 program commands allowed (X1. Y2. counts as 2). I > > think that an old machine with reliable axes and spindle would be much > > more useable with LinuxCNC than with a program limit of 512 commands! > > I've got a machine with much the same limit (1200 line) - which is somewhat > frustrating at times. I couldn't figure out a way to (easily and cheaply) > convert it over to linuxcnc without replacing the existing drives and > resolvers - which made it a rather more time consuming and expensive task > than I was willing to undertake. Oddly enough, there was a post from Tim > James earlier today about a conversion chip which looks like it may allow me > to use the original resolvers - bringing the pain of conversion down to > tolerable levels. The other option would be to upgrade the controller to a > TNC 151 or 155 - but they seem to be rather rare these days.
http://pico-systems.com/resolver.html It appears to take one of these for each resolver so it is not cheap. If you can get encoders that will fit into the available space that might be the cheaper way to go. Dave > > > Right though, that you would want to select a motherboard that's > > reliable. Trying 2 MBs to get 1 good one wouldn't be all that > > expensive for a production environment. > > > > I think this depends on the value of labour more than anything - either you > have a low (relative) labour cost, in which case it's worth testing multiple > boards, changing caps, etc (or as used to be done, custom fitting bearings, > hand scraping, ...) or you have a high labour cost, in which case it's worth > spending more money on a highly reliable board in the first place > (universally matched precision bearings, ground ways). > > I'm a lot more willing to spend time repairing or upgrading components for > my hobby than I am for my day job. Fixing 'dead' motherboards by replacing > the failed caps used to be a darn sight cheaper than buying a new machine - > not so sure it is now. > > > ------------------------------------------------------------------------------ > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial > Remotely access PCs and mobile devices and provide instant support > Improve your efficiency, and focus on delivering more value-add services > Discover what IT Professionals Know. Rescue delivers > http://p.sf.net/sfu/logmein_12329d2d > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
