On Thu, Jun 28, 2012 at 12:18 AM, Viesturs Lācis <viesturs.la...@gmail.com>wrote:
> > 1) use shielded cables for encoders AND for motor power; shield is > grounded only on one end of cable, most probably the drive end; > We use Mitsubishi J2S servo drivers for plasma machines. Its encoder cable is shielded, while its power cable is not. We had EMI issues with servo drivers at beginning. Then we realized that we need an isolated pulse/encoder interface for such machine. So, we developed one, and it solves the EMI issue. > 2) connect the machine frame and all the moving constructions and > everything possible to earth grounding; > 3) route plasma cable separately from motor/encoder/signal/whatever > cables wherever possible; > Those are correct wiring strategies for signal integrity. > And last one - I would like to share a video of Anthony's 5 axis > plasma cutting machine. I think that he has built very nice machine > and I find his design of the rotary head to be very interesting (well, > take a look at other of his videos for some closeups). > > The video shows the taper control module in action, running a > testcode, consisting of 2 arcs. > http://www.youtube.com/watch?v=myNtcNJBcTA Nice machine! Just, I heard significant motor noise from the video. Is it driven by open-loop stepper motors? Yishin ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
