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i opened up my g540, to verify that the db9 connectors outer housing is not connected to anything. my idea is to solder a strip of copper across the housings, and solder a wire from that strip into the grounding in my 230 vac outlet. then i could wire the shielding to the chassis part in the connector. does that sound correct? here is a picture of the opened drive, showing what i would like to do:
http://i918.photobucket.com/albums/a...ps36b28652.jpg
I'm pretty sure the shielding is already connected via the G540 top plate, which as far as I know is in steel or aluminum. So this would just not have any function.
no, it does not seem like the outer case is in direct contact with the ports.
You should preferebly have a common star point ground plate set up where all the machine grounds, the service earth ground, and bonding conductors go to.
Also when bonding is carried out, it is not practice to earth ground both ends of the shield.
http://www.automation.siemens.com/do.../emv_r.pdf?p=1
Al.
I hear you all but my own experience with shielded wire end up with me disconnecting them
All my cables are shielded and grounded at both ends, this makes for a great shielding on my machine.... I have never had any grounding faults on my machine...
If your using gecko cables that part of the cable is not connected as there is no contunuity from one end to the other ...there is no contuinity also from one connector to the next on the G-540.
Quote:
Originally Posted by Beargesen
shielding is usually grounded at the supply side only to avoid ground loops.Quote:
Originally Posted by IN-WondeR
Used to be.Quote:
Originally Posted by Claude Boudreau
See the Siemens link in post #4 ch6.
This if the recommended equi-potential bonding is done as well.
Al.
Use pins 2, 3 or 4 on the DB-9 connector for grounding a shield. The shield should be unterminated at the motor end. Be careful connecting the shield wire to the DB-9 connector, don't let it touch any of the other pins or it will result in instant death for that axis drive.
Is this why on the gecko cables I dont measure continuity from one end connector to the other ?Quote:
Originally Posted by Mariss Freimanis
I mean the metalic part of the db9 from one end to the other end.
Is this part connected to the shield? There is continuity on my db25...
I working with the same thought, the DB9 on the Gecko G540 are not ground to anything as via opening the controller and viewing the metal shield terminator.Quote:
Originally Posted by Beargesen
I have search many times on the Web and YouTube, yes use Shield cable but never have seen terminating a wire to transfer the ground.
The vast majority of my work was for customers, so I could not afford Intermittent problems.
I used one of the very best shielded cables for encoders etc.
Belden 9891. each pair individually shielded, OA shield plus single GND conductor. But very pricy$$$.
I adopted the custom suggested by the Siemens publication, equi-potential bonding of machine, and grounding shield both ends.
Never had a problem.
So why don’t you connect the shied wire to the DB9 pins 2,3 or 4 as Marris suggests as they are connected to ground?Quote:
Originally Posted by aggies
Cheers
Peter
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