We were using shielded cable for communicating with a manual switch box. Then a few years back when we upgraded our floor PC server we went with an electronic switch box from Byteway. To this box we are running fiber optic cables. No pin connections required and no worries for interference with optics. We have a Bostomatic Mill, Hurco Mill and three Agie wire machines hooked up to the box via optic cabling with no problems.
Regards, Michael Senack -----Original Message----- From: genebo [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 27, 2003 11:26 AM To: Bigelow, Louis Cc: 'Lee Greer'; '[EMAIL PROTECTED]'; [EMAIL PROTECTED] Subject: Re: [mfg-smartcam] SmartCAM Comms Louis, Connect the shield at one end only to pin 1. It is an excellent way to trap radio frequency noise. Use a twisted, shielded pair for the pin 2-3 and pin 3-2 connections (the data lines). This will also reduce interference An RS-232C connection is only intended for use up to 50 feet. As you go longer, the signals weaken. We have used RS-232C as long as 200 feet in quiet locations, but that is really pushing it. For runs up to 900 feet, use a line modem on each end ($60-$100? each). That will cut out almost all interference. Sources of interference are welding, electric motors, fluorescent lights and EDM. Avoid them. Don't plug a radio into the same outlet as the computer or the CNC machine. It induces voltage drops and spikes on the AC line. Put a good 8' copper ground into the ground at the CNC machine if you can. Gene Bowen. Bigelow, Louis wrote: >delete the pin 1 connection!!!! >this is a frame ground pin and can (and has at our plant) >pass considerable current if there is any difference >in the ground potential. (we already had a $4,000 repair >bill from Okuma.) >Louis > > ====================================================================== To find out more about this mailing list including how to unsubscribe, send the message "info mfg-smartcam" to [EMAIL PROTECTED] ====================================================================== ====================================================================== To find out more about this mailing list including how to unsubscribe, send the message "info mfg-smartcam" to [EMAIL PROTECTED] ======================================================================
