My home made machine connects the enables to the machine enable. I don't think it was my idea - I think it was based on one of the servo examples. E-Stop is completely independent - connects to the e-stop switch, and axis limit switches and kills power to the spindle and servos (originally it cut ALL power, but shutting the PC down was silly).
-----Original Message----- From: John Dammeyer [mailto:jo...@autoartisans.com] Sent: Wednesday, 10 February 2021 4:09 PM To: 'Enhanced Machine Controller (EMC)' Subject: [Emc-users] Dealing with Servo Faults Quick question. There's a multi-axis operation in progress. For whatever reason one of the servos throws out a fault and of course stops. Should just the enables to the other servo drives be removed or should power be cut to all drives. I'm not really in favour of dropping out power because that would mean you also lose the ability to easily recover. The other drives and spindle were working so you really just want them stopped and things like coolant shut off. This isn't the same as an ESTOP which does remove all power that could result in motion. Low voltage control and PC are left running. For my PMDX-126 BoB my faults are consolidated and brings the PMDX /FAULT input low. That disables the ChargePump which in turn disables all outputs including the enable to all the drive. And the orange button beside the red one on the user screen goes greyed out. After 4 seconds the /FAULT input is once again brought high (inactive) and now the orange ENABLE button on the screen (or F2) can be clicked which then asserts the ENABLE output to the drives and allows hardware to be controlled again. For my servos taking the ENABLE signal FALSE and then TRUE resets the FAULT condition. If the fault is still there then the /FAULT is brought low again. Etc... What do other systems (including commercial) do when a drive faults on one axis. John _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
