Jerry I didnt answer your question. to measure acceleration there's an industry standard 'step' test. The 'step' is to apply the voltage required to achieve max velocity. This voltage **instantly** rises from 0 to the value needed for max velocity. Thats where the name 'step' comes from, Its a square edge on a scope.
A second measurement is now needed, Some way to determine _when_ the maximum velocity is actually achieved. Old school dc motors gave us Tachos so this was easy. I dont know what you can put together. You could attach a voice coil to the end, I suppose. Measure when the output voltage goes constant ( at max vel ) A scope should show a 'knee' starting at 0Volts. But if you measure time from the 'step' until the max vel, you have the precise acceleration _time_. The acceleration time divide by time is the acceleration ( example .240 Sec accel time to achieve 800mm/minute velocity is .24 sec to achieve 13.333mm/sec is 55.555 mm/s/s 3.15"/sec / 0.02ec = 157.5in/s/s ) HTH TomP tjtr33 On 08/25/2015 04:09 PM, Jerry Scharf wrote: > Hi, > > My quick scan of the docs didn't find an explanation for how to calculate > this from manufacturer specs rather than experimentation. I want to make > sure I am doing this right. > > The actuator is rated a 3.15 inches per second and it can reach full speed > in under .02s for the load I will be putting on it. If I use a = v/t, this > comes out to about 150 inches per second square. Does this look right? > > The actuator is a SMC LXPB2BD-50S that I picked up used. > > jerry > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
