forgot the link https://www.pololu.com/product/705 This is different because the Polulu version has a MOSFET to protect from connecting the power supply backward. This likey matters more in battery-driven projects.
But really they are all the same H-Bridge. Just buy one rated for the volts and amps you need. On Thu, Oct 15, 2020 at 9:55 AM Chris Albertson <albertson.ch...@gmail.com> wrote: > Gene just Google the part number "VNH3SP30". Polulu has them. It is in > fact my "go to" driver. These were developed for automotive use for things > like driver seat adjustment motors. > > Polulu's version of this has reverse voltage protection but they seriously > de-rate the chip. Just read the datasheet that is linked from their site. > > Here is the way I used these... > I buy a slightly different version of the chip that comes on an > "Arduio Sheild" ebay link > <https://www.ebay.com/i/401089386943?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=401089386943&targetid=934793863816&device=c&mktype=pla&googleloc=9031026&poi=&campaignid=10877149888&mkgroupid=107912403075&rlsatarget=aud-622524042918:pla-934793863816&abcId=9300400&merchantid=101638797&gclid=CjwKCAjw5p_8BRBUEiwAPpJO6-QTPa9wyIxLjU-wVv6qq8PaY8DUPaxrZw7TRhXg8XKzfNEiapIrIhoCidAQAvD_BwE> > Then I buy a Nucleo board from STM www.digikey.com/...NUCLEO-F401RE > <https://www.digikey.com/en/products/detail/stmicroelectronics/NUCLEO-F401RE/4695525?WT.mc_id=frommaker.io> > These mate together with a bunch of 0.1" header pins. > > With some software in the STM32 I now have a USB connected dual motor > driver that can handle up to about 20 amps peak and 12 A continuously The > control PID loops run on the STM32 and I only have to send speed or > position commands over the USB cable. It would be about as easy to > assemble an Ethernet or SPI connected motor controller from these same > parts. The stack-up is a little bulky but it is so easy to do and cheap > I can put up with the excess cubic volume. > > > On Thu, Oct 15, 2020 at 9:12 AM Gene Heskett <ghesk...@shentel.net> wrote: > >> On Thursday 15 October 2020 08:32:07 Roland Jollivet wrote: >> >> > Maybe this is good for you, if available locally; >> > >> > https://www.olimex.com/Products/Robot-CNC-Parts/MotorDrivers/BB-VNH3SP >> >30/open-source-hardware >> > >> I give up, none of the 3 USA distributors are carrying that item. >> >> > On Wed, 14 Oct 2020 at 22:42, Gene Heskett <ghesk...@shentel.net> >> wrote: >> > > After it finally was delivered, testing looks good but now I need a >> > > controller, smaller and lower voltage than one of Jons pwm-servo's. >> > > >> > > This motor supposedly turns 220 rpms no load with 24 volts applied. >> > > >> > > It has an encoder on the rear which is making a 5.4khz quadrature >> > > signal when its running free, out of 4 wires, no index which is fine >> > > as I'll put a switch on the BS-1 for a home/index anyway. >> > > >> > > This motor draws 4 amps at max rated 100 watt input. >> > > No clue what the LRA amps is but it does jump pretty good getting >> > > started so I'd expect startup in-rush to be at least 10 amps. >> > > >> > > I'd like to control its position like a common rotary servo axis, so >> > > what do we have in our linuxcnc toolbox that looks like a bi-dir pwn >> > > controlled twin H bridge to run a 24volt brushed PMDC motor with a >> > > 10 amp in-rush as if it were a servo? >> > > >> > > Thanks all. >> > > >> > > Cheers, Gene Heskett >> > > -- >> > > "There are four boxes to be used in defense of liberty: >> > > soap, ballot, jury, and ammo. Please use in that order." >> > > -Ed Howdershelt (Author) >> > > If we desire respect for the law, we must first make the law >> > > respectable. - Louis D. Brandeis >> > > Genes Web page <http://geneslinuxbox.net:6309/gene> >> > > >> > > >> > > _______________________________________________ >> > > Emc-users mailing list >> > > Emc-users@lists.sourceforge.net >> > > https://lists.sourceforge.net/lists/listinfo/emc-users >> > >> > _______________________________________________ >> > Emc-users mailing list >> > Emc-users@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/emc-users >> >> >> Cheers, Gene Heskett >> -- >> "There are four boxes to be used in defense of liberty: >> soap, ballot, jury, and ammo. Please use in that order." >> -Ed Howdershelt (Author) >> If we desire respect for the law, we must first make the law respectable. >> - Louis D. Brandeis >> Genes Web page <http://geneslinuxbox.net:6309/gene> >> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > > -- > > Chris Albertson > Redondo Beach, California > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
