CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] Re: Limit Switch Installation

Posted by Jon Elson
on 2000-11-15 23:15:45 UTC
jmw@... wrote:

> OK--but what happens if EMC decides pi is a rational number?

If things go really bad, the watchdog on the STG card will timeout
in a couple of milliseconds and cause an E-stop. If the DACs get
sent a sudden full-throttle command, the servo amps will get an
overcurrent and trip offline, causing an E-stop, too. If the
following error gets too big, it will cause an E-stop.

I have the E-stop set up to disconnect the DC power supply from the
servo amps, and connect an energy dump resistor to the amps, to
rapidly decelerate the motors.

There are manual E-stop buttons, too.

Jon

Discussion Thread

jmw@c... 2000-11-15 14:56:31 UTC Limit Switch Installation Wally K 2000-11-15 15:37:09 UTC Re: Limit Switch Installation Jon Elson 2000-11-15 15:43:56 UTC Re: [CAD_CAM_EDM_DRO] Limit Switch Installation jmw@c... 2000-11-15 15:44:04 UTC Re: Limit Switch Installation Alan Marconett KM6VV 2000-11-15 15:51:32 UTC Re: [CAD_CAM_EDM_DRO] Limit Switch Installation Wally K 2000-11-15 17:53:28 UTC Re: Limit Switch Installation Jon Elson 2000-11-15 23:15:45 UTC Re: [CAD_CAM_EDM_DRO] Re: Limit Switch Installation