On 07/23/2015 07:42 PM, Tom Easterday wrote: > I am tweaking my Emco 120P lathe that is driven by Berger-Lahr 5-phase > stepper motors and Oriental Motor Vexta UDX5128NA drivers. Step/Dir is > supplied by a Mesa 6i25. I want to know what maximum velocity I can reliably > get from the motors. I have run them at 90ipm max for some time and have > never had a problem. But we want to do some movements that require higher > speeds (140-150 ipm) and I am wondering if I crank up the step pulses can > they handle it. The whole idea of the 5 phase steppers was to get much higher speeds that the state of the art in the 1970's with 2-phase steppers. > I turned up the parameters in my .ini file in order to step at 150ipm and I > get what I think is good movement. I moved around randomly and also in > specific increments and don’t see any error on the DRO. What tests can I do > to verify that the machine can RELIABLY handle this speed? > > Make a series of moves at varying speed, and then return to the original position and make a before/after measurement. If the position is actually the same, then there have been no lost steps. That is the only thing you care about.
The DRO on LinuxCNC will NEVER show errors unless you have fitted encoders to the axes. Jon ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
