On 2/17/2019 4:23 PM, mugginsac wrote: > I have some old slow stepper drivers (Superior SS2000MD4), max frequency 20 > kHz, min pulse width 25 microseconds and min rise and fall times 1 > microsecond. > Will setting pru-period to 25000 wreak havoc with the pru code? Leave the PRU period set to something sensible and use the steplen, stepspace, and dirsetup/dirhold values to control the pulse timing. Based on the user manual, it looks like setting all four values to 25000 should work for you.
The rise/fall time is spec'd as *minimum*, not maximum, and any of the first three drive circuits listed in the manual should work with the BBB, depending on what you've got handy for parts and power rails. -- Charles Steinkuehler [email protected] -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
