> Nicklas, when I built a pcb drilling machine some years ago, I found > constant acceleration and deceleration to top speed worked best, as > for the most part trying to go instantly to the maximum speed the > motors are capable of results in lost steps. > You will need a bit of experimentation to determine the rate and > length of both acceleration ramps as it will depend on the mass of > your machine and the motors and power supply you are using. > > Ken.
Constant acceleration and deceleration to top speed worked best fit very well with physics. Stepper motor magnets induce a voltage proportional to speed which limit maximum speed. Torque is about the same regardless of speed and there are some intertia. Regards Nicklas Karlsson > > On Sat, Mar 19, 2016 at 5:46 AM, Nicklas Karlsson > <nicklas.karlsso...@gmail.com> wrote: > > I am planning to use a micro controller for stepper step pulse generation. > > I have considered to use an inverter card but special purpose stepper > > circuits are cheap so I use one of these instead. It should be possible to > > feed timer values then toggle should happen via DMA timer output compare > > values. > > > > Can anyone suggest how an ideal step generation curve should look? Constant > > acceleration up to top speed? Constant deceleration from top speed to zero? > > Or just stop generating pulses? > > > > Regards Nicklas Karlsson > > > > ------------------------------------------------------------------------------ > > Transform Data into Opportunity. > > Accelerate data analysis in your applications with > > Intel Data Analytics Acceleration Library. > > Click to learn more. > > http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ > Transform Data into Opportunity. > Accelerate data analysis in your applications with > Intel Data Analytics Acceleration Library. > Click to learn more. > http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
