CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] shielding for steppers

Posted by JanRwl@A...
on 2001-11-21 21:39:53 UTC
In a message dated 21-Nov-01 21:23:11 Central Standard Time, cncnut@...
writes:


> But do steppers need shielding. It appear to be
> unnecessary?


Peter: The steppers themselves, and their driver-outputs, do NOT need
shielding. However, many professional installations of steppers have
shielding around the four or six wires between the drivers and the motor,
often grounded ONLY one one end, to reduce the EMI to OTHER logic-circuitry
caused by the rather-substantial EMI caused by the high-current "square-wave"
switching of the motor-current. Opto-isolator inputs to the stepper-driver
circuitry can eliminate MUCH of the EMI effects you might otherwise realize
with only "TTL wiring" from PCB to PCB (or computer printer-port to
motor-driver circuit-boards, etc.).


[Non-text portions of this message have been removed]

Discussion Thread

cncnut@s... 2001-11-21 19:21:59 UTC shielding for steppers JanRwl@A... 2001-11-21 21:38:30 UTC Re: [CAD_CAM_EDM_DRO] shielding for steppers JanRwl@A... 2001-11-21 21:39:53 UTC Re: [CAD_CAM_EDM_DRO] shielding for steppers Jon Elson 2001-11-21 22:10:35 UTC Re: [CAD_CAM_EDM_DRO] shielding for steppers cncnut@s... 2001-11-22 10:12:30 UTC Re: shielding for steppers Jon Elson 2001-11-22 13:47:18 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers JanRwl@A... 2001-11-22 14:44:25 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers mariss92705@y... 2001-11-22 20:17:46 UTC Re: shielding for steppers Bill Vance 2001-11-23 02:10:12 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers wanliker@a... 2001-11-23 05:30:35 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers frenner@c... 2001-11-23 07:22:05 UTC Re: shielding for steppers cncnut@s... 2001-11-23 09:00:31 UTC Re: shielding for steppers mariss92705@y... 2001-11-23 09:25:09 UTC Re: shielding for steppers Carol & Jerry Jankura 2001-11-23 13:13:24 UTC RE: [CAD_CAM_EDM_DRO] Re: shielding for steppers Alan Marconett KM6VV 2001-11-23 14:01:27 UTC Re: shielding for steppers JanRwl@A... 2001-11-23 14:42:44 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers mariss92705@y... 2001-11-23 15:41:19 UTC Re: shielding for steppers shymu@b... 2001-11-23 19:38:44 UTC Re: shielding for steppers Steve Smith 2001-11-23 20:26:44 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers Bill Vance 2001-11-23 22:22:55 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers cncnut@s... 2001-11-24 02:25:40 UTC Re: shielding for steppers Bob Campbell 2001-11-24 07:18:01 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers mariss92705@y... 2001-11-24 11:00:28 UTC Re: shielding for steppers Alan Marconett KM6VV 2001-11-24 11:52:15 UTC Re: shielding for steppers JanRwl@A... 2001-11-24 13:53:28 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers JanRwl@A... 2001-11-24 14:29:58 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers Paul 2001-11-24 17:20:11 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers Steve Smith 2001-11-24 17:36:18 UTC Re: [CAD_CAM_EDM_DRO] Re: shielding for steppers