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Mach4 General Discussion / Re: M03 yes, but no M05
« on: November 05, 2017, 10:17:46 AM »
I assume that this router is driven by a variable frequency drive (VFD). If so, it could be that the VFD is configured for a momentary normally open start signal and a normally closed stop signal instead of the more common FWD and REV signals that must be held on to run. Some VFD manuals refer to momentary start signal method as a "3-wire control" configuration.
Using this configuration would could cause the router to start when the M3 is executed, but not react when the signal is removed by executing an M5 because something must break the normally closed signal in the VFD's stop loop. Mach4 would need a macro and an normally closed output to work with a "3-wire control" configuration. It would be much simpler to change the parameters in the VFD to use the more common "maintained" FWD and REV control setup.
Here is a link to a description of 3-wire-control from a Toshiba technical support site:
https://www.toshiba.com/tic/datafiles/1.0_S15_3-Wire_Control_App_Note.pdf
Steve Stallings
www.PMDX.com
Using this configuration would could cause the router to start when the M3 is executed, but not react when the signal is removed by executing an M5 because something must break the normally closed signal in the VFD's stop loop. Mach4 would need a macro and an normally closed output to work with a "3-wire control" configuration. It would be much simpler to change the parameters in the VFD to use the more common "maintained" FWD and REV control setup.
Here is a link to a description of 3-wire-control from a Toshiba technical support site:
https://www.toshiba.com/tic/datafiles/1.0_S15_3-Wire_Control_App_Note.pdf
Steve Stallings
www.PMDX.com