The maximum velocity depends on the voltage and as Jon said testing for lost step is needed.
For example look at the torque vs speed charts here http://www.automationdirect.com/static/specs/surestepmotors.pdf Also on the wiki is some formulas for steppers JT On 7/23/2015 7:42 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. > > 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? > > The relevant section on the step/dir timing from the Vexta driver manuals are > here: > http://bgp.nu/~tom/pub/vexta-1.pdf > and > http://bgp.nu/~tom/pub/Vexta-2.pdf > > > My current .ini settings are: > > [DISPLAY] > MAX_LINEAR_VELOCITY=2.5 > > [TRAJ] > MAX_VELOCITY=2.5 > > [AXIS_0] > MAX_VELOCITY=2.5 > MAX_ACCELERATION=50 > STEPGEN_MAXVEL=3.125 > STEPGEN_MAXACCEL=62.50 > DIRSETUP=10000 > DIRHOLD=5000 > STEPSPACE=5000 > STEPSPACE=5000 > STEP_SCALE=10159.997 > > > AXIS_2] > identical to AXIS_0 (except for “-“ on STEP_SCALE) > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
