On Tuesday 22 September 2015 10:39:05 Mark Wendt wrote: > On Tue, Sep 22, 2015 at 10:20 AM, Gene Heskett <ghesk...@wdtv.com> wrote: > >> All it takes is a bit of interference in the band of radios waves > >> those devices use. I still prefer hardwired connections rather > >> than trusting radio waves on stuff like that. Or, as you > >> mentioned, the batteries. It only has to happen once. > >> > >> Mark > > > > This also is true, but I am not in an industrial environment where > > such interference is at all common. Whats in the shop or garage is > > not of course semi-shielded by the alu siding on this house and > > would be 10+ db more susceptible. This is a relatively quiet, 50 > > yards from the city limits residential area, with more electronics > > here than exists anyplace but a fast food place in the whole town, a > > physical limit enforced by a huge to me hill that only small > > children could negotiate, very thick brush, but don't as its also > > multiflora rose and copperhead country. So here, that interference > > has not been a problem. I think that isolation from technology is > > without a doubt a good thing for me. > > > > I have no experience in a busy job shop with 5 or more machines in > > the same big room. In the shop in the back yard, the toy mill and > > the lathe are about 4 feet apart, but the lathe is the only wireless > > equipt machine. The operating position of the toy mill is actually > > above the right end of its table, so I can see it well while jogging > > with my right hand. No need for the radios. > > > > In the garage with the GO704, I do need to put up a sheet of lexan > > to deflect airborne swarf between the operating position and the > > machine as it would help keep swarf out of both the keyboard and my > > coffee cup. :) > > > > OTOH, the spindle motors max at 1 hp here, are the strongest motors > > involved. All could throw a key on startup plenty hard enough to > > hurt. > > > > Axis motors are more than strong enough to break or crush tools > > though. I sheared a 4 mm capscrew sunday by leaving something on the > > bellows I had added to better shield the Y ball screw from debris, > > so they are certainly capable of crushing a wayward finger. One of > > todays projects I think along with finding a fly cutter to level the > > front of that jig addition installed yesterday. And I need to make > > some narrow, say 5" wide, binder high pocket shelving additions to > > the "furniture" for holding gcode manuals and printouts of some of > > the files so I don't forget what it was I was doing. :) > > > > Cheers, Gene Heskett > > Gene, > > Like I said, it's my dislike for radio waves in an environment where > they are the connection between the controller and the machine. Being > a radio tech in the USAF, working with both voice radios and ECM gear, > I know it doesn't take much to disrupt communications, both voice and > data. Voice is a little more forgiving than data. If a voice > transmission is disrupted/corrupted, you can ask for a repeat. If a > data transmission is corrupted, the machine isn't always smart enough > to ask for a repeat - it may take the corrupted packet as legit. > > There may not be any commercial or residential interference nearby > you, but there's that really big interference generator 93 million > miles away from your doorstep that appears every day. ;-) > > When something absolutely has to have a solid connection, whether it's > controller to machine, or keyboard to the controller, you just can't > beat a good shielded hardware connection between the two. > > Mark
Chuckle, good, shielded, and hardware. Pick any 2. :) Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
