On Sun, 20 May 2012 20:57:06 -0700 Rafael Skodlar <ra...@linwin.com> wrote:
> On 05/20/2012 12:12 PM, Dave wrote: > > On 5/20/2012 12:40 PM, Rafael Skodlar wrote: > >> I wonder what kind of power and data cables would you recommend > >> for use in X-Y-Z CNC about 1.2mx1m size? Besides power, it's not > >> clear to me how many data lines for sensors, encoders, motor > >> control, etc. are needed in general. > >> > >> Is it preferable to carry power and handful of control signals to > >> the circuit on the gantry and preprocess some functions there or > >> have everything wired into the central box? That would dictate the > >> number of wires in the cable needed and what kind you need to buy. > >> > >> Would cable carrier from McMaster-Carr # 55835K432 be sufficient? > >> > >> Thanks, > >> > >> > > > > Figure out what cables you need to move back and forth and then > > choose the carrier. Jamming cables into a cable carrier is not a > > good idea. > > I'm well familiar with flexing and shielding issues in general since > early HP plotter days. I was hoping to get a simple answer based on > real life experience, get this or that cable with x number of > shielded and stranded or twisted wires ;-) That's why I mentioned > size as that would give one an idea of motor sizes and other > requirements. > > Is it better to have one cable with x number of wires to take care of > all needs or a number of smaller cables (y) with x/y wires? > > > If you don't do some figuring before you know what you are going to > > carry, you will either have too much, or not enough space. > > Guessing usually doesn't work out nearly as well. > > > > Agree, and that's why I tried to see what others are doing on this > issue as it seem to be poorly documented in general. I try to capture > this from numerous pictures but wires seem to generate little > interest in general. > > > As an alternative supplier; Igus sells direct in the US. > > http://www.igus.com/default.asp?c=us&L=en > > > > Dave > > > > Links are always encouraging. However, I'm still struggling with the > variety of cables mentioned on Igus site: data cable, bus cable, > servo cable, control cable. Lots of homework ahead I guess, and > that's before the experiment can begin. > > Thanks guys, > I've used shielded CAT5 with no problems for encoder cables. I usually buy 50' patch cables and cut them up. Seems to be the cheapest way to get there. SO in two conductor works well for servo power. I suppose it also comes in 4 conductor for 3 phase. Of course, there is no shielding. ;-( Dave ------------------------------------------------------------------------------ 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
