I see that some of these use the VNH2SP30 and some use the VNH3SP30. Is one of them a newer revision of the same chip?
> On Oct 15, 2020, at 12:02 PM, Chris Albertson <albertson.ch...@gmail.com> > wrote: > > forgot the link https://www.pololu.com/product/705 > <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 > <mailto: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 <mailto:Emc-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/emc-users > <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
