Re: [beagleboard] Re: PWM: only a finite number of pulses? Controlling stepper motor
what is the end product you want ? cnc ? 3d printer ? Linuxcnc does all this and is proven and reliable and works on a beaglebone black ( machinekit) i am a moderator for Linuxcnc , and have worked with steppers for a lot of years , so give me some more information and see how it fits or not to your project needs it all depends on what else you want the BBB to do , as you only have limited resources A4988 is a standard stepper driver and works no differently than any other , if Linuxcnc is too much of bruteforce etc , see Derricks video here , it works very well http://derekmolloy.ie/beaglebone/driving-stepper-motors-in-embedded-linux-on-the-beaglebone/ Shout if i can be of help Dave see Linuxcnc.org Machinekit see http://www.machinekit.io/ google group machinekit -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to a topic in the Google Groups BeagleBoard group. To unsubscribe from this topic, visit https://groups.google.com/d/topic/beagleboard/hEql7u7kAlc/unsubscribe. To unsubscribe from this group and all its topics, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: PWM: only a finite number of pulses? Controlling stepper motor
see Linuxcnc.org and the beaglbone variant Machinekit does exactly that On Saturday, 18 October 2014 02:26:26 UTC+1, plla...@gmail.com wrote: http://electronics.stackexchange.com/questions/134356/beaglebone-generate-finite-pulse-train# I'm wanting to use the BeagleBone Black to generate a FINITE number of pulses, in order to control a stepper motor. For the controller I have, an A4988, each pulse is one step on the motor. How can I use the PWM on the BBB to send, say, 5 pulses, and no more or less than 5? Or I can use a GPIO. Whichever works. I have the Adafruit BBIO library https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/using-the-bbio-library installed. I have thought of doing this in a simple, stupid way - just using python's time.wait() and toggling a GPIO pin, however many times I'd like. But this seems very inaccurate, timing-wise, and moreover inelegant; is there a way to do this better? I'm also investigating events -- i.e., count the numberof pulses that have occured using another GPIO, then stop the PWM when the number of pulses I want has been counted. Any ideas? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: PWM: only a finite number of pulses? Controlling stepper motor
May be you can ask these guys here: http://www.halaser.eu/e1701m.php They're offering an industrial motor controller based on an BBB and should have solved this problem. Am Samstag, 18. Oktober 2014 03:26:26 UTC+2 schrieb plla...@gmail.com: http://electronics.stackexchange.com/questions/134356/beaglebone-generate-finite-pulse-train# I'm wanting to use the BeagleBone Black to generate a FINITE number of pulses, in order to control a stepper motor. For the controller I have, an A4988, each pulse is one step on the motor. How can I use the PWM on the BBB to send, say, 5 pulses, and no more or less than 5? Or I can use a GPIO. Whichever works. I have the Adafruit BBIO library https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/using-the-bbio-library installed. I have thought of doing this in a simple, stupid way - just using python's time.wait() and toggling a GPIO pin, however many times I'd like. But this seems very inaccurate, timing-wise, and moreover inelegant; is there a way to do this better? I'm also investigating events -- i.e., count the numberof pulses that have occured using another GPIO, then stop the PWM when the number of pulses I want has been counted. Any ideas? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: PWM: only a finite number of pulses? Controlling stepper motor
You could use the SPI interface Am Samstag, 18. Oktober 2014 03:26:26 UTC+2 schrieb plla...@gmail.com: http://electronics.stackexchange.com/questions/134356/beaglebone-generate-finite-pulse-train# I'm wanting to use the BeagleBone Black to generate a FINITE number of pulses, in order to control a stepper motor. For the controller I have, an A4988, each pulse is one step on the motor. How can I use the PWM on the BBB to send, say, 5 pulses, and no more or less than 5? Or I can use a GPIO. Whichever works. I have the Adafruit BBIO library https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/using-the-bbio-library installed. I have thought of doing this in a simple, stupid way - just using python's time.wait() and toggling a GPIO pin, however many times I'd like. But this seems very inaccurate, timing-wise, and moreover inelegant; is there a way to do this better? I'm also investigating events -- i.e., count the numberof pulses that have occured using another GPIO, then stop the PWM when the number of pulses I want has been counted. Any ideas? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
