I have my router working really well with the following configuration. Solid state tiny computer running win 10. Mach 3 latest version Pokeys USB CNC thing connected to a PDMX.

I am finally getting smooth motion no lost steps etc etc. Everything works except.

Occasionally Mach3 just stops and is totally unresponsive. Can not reset, jog etc. The diag screen shows all ins and outs off. I have to kill Mach 3 and start again.

I am pretty sure that every time it does this, when I restart the 4th axis DRO shows 4099.xxx? the 4th axix is angular.?

I am running a gcode with a subroutine that repeats over and over with a tool change to allow inserting a new part for machining. i am also using the subroutine to make it possible to count parts.?

when this failure happens is always close to the spindle motor going on or off. it is a three phase servo run by a high quality US inverter. Forgot the name right now but it is a good inverter not Chinese no name stuff.

I am pretty sure the spindle motor is causing noise that kills the Pokeys. I have proper grounding and shielding.?

I changed the inverter carrier frequency from the default of 5Khz to 2khz and have not had the problem yet but it some times does not happen for a considerable time.?

any ideas? does the 4099 signify some overflow?? does it sound like it is inverter noise? might the lower carrier frequency be the fix?

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Best regards, Spencer Chase
67550 Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
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(425) 791-0309
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