On Wednesday 16 March 2016 13:26:47 Todd Zuercher wrote: > Bringing back an older thread. Went to start ordering the things I > need for the update and noticed that the conduit to the machine isn't > big enough for the new wiring. Right now the 9 single phase circuits > are run through two 3/4" conduits (4 in one 5 in the other). would it > be a really bad idea or against regs, to split the 3ph wiring between > the 2 conduits? (2+ground in one and 1+nutral in the other)
Thats a bad thought in general Todd. Any longitudinal noise is now cross coupled into both conduits and their contents. In fact, I would run one new conduit big enough to handle the power, put all the power in that one, and all the data in the other. > ----- Original Message ----- > From: "Gregg Eshelman" <g_ala...@yahoo.com> > To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> Sent: Saturday, February 6, 2016 > 6:10:07 PM > Subject: Re: [Emc-users] Rewire Question? > > On 2/6/2016 3:23 PM, Dave Cole wrote: > > Make sure whatever you do that you have a way to lock out the main > > breaker in the off position. > > Osha wants to see that and it makes good sense. Make sure you also > > have a couple of red "lock out padlocks" around also. Keep one with > > your tools. > > I had a guy come up to me and ask what I was doing just as I was > > packing up my things after servicing a machine at a manufacturing > > plant. The idiot who was with him ( a plant management person ) > > failed to mention that he was an Osha enforcement guy so I explained > > what I had done and then the Osha guy introduced himself. > > He asked if I lockout the machines I work on and I just pointed at > > my lock hanging on my tool bag strap and said, there's my lock. The > > truth is that the machines are impossible to debug with the power > > off. But that doesn't matter, as they will happily fine you > > regardless. The fines normally start with 4 digit numbers. > > I don't visit that plant much any longer. They now ship the > > machines to another location so they can be serviced. Their safety > > "rules" are so difficult to deal with that it makes no sense to try > > and do work in that plant. For the same reason they can't keep any > > decent engineers or technicians at that location. I predict the > > plant will be closing within the next 5 years. The plant machinery > > will probably end up in Mexico. > > I'm all for being safe since it is my butt that is on the line, but > > there is a level of common sense that must be used. > > > > Osha and some plants seem to forget that from time to time. > > On some other forum I read a post by a person who used to work in a > shop when a new CNC machining center was installed. > > From where the controls were, it was impossible to see the tools to > jog them into position if the door was closed. Open the door and > nothing could be moved. > > The fix was a wedge someone made to jimmy the door sensor so the > operator could see into the machine when jogging it. It could be > quickly removed if an inspector showed up. > > That's what happens when a machine is so over-saftied, it forces > operators to disable safety systems in order to make it usable. How it > should have been built is either with the controls mounted so that the > operator could see into the work space while standing at them, or the > door safety should only have locked out the spindle and turret > rotations, while limiting axis travel to slow speeds. That would have > made setting up quicker and safe. Select the tool, open door and set > position. Close door and select next tool. Repeat until all tools are > set. > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > > ---------------------------------------------------------------------- >-------- Site24x7 APM Insight: Get Deep Visibility into Application > Performance APM + Mobile APM + RUM: Monitor 3 App instances at just > $35/Month Monitor end-to-end web transactions and take corrective > actions now Troubleshoot faster and improve end-user experience. > Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ---------------------------------------------------------------------- >-------- Transform Data into Opportunity. > Accelerate data analysis in your applications with > Intel Data Analytics Acceleration Library. > Click to learn more. > http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users 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> ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
