On Thursday 12 November 2020 20:50:10 Dave Cole wrote: > Gene, > > Where did you buy that H bridge board ? Ebay ? > > Dave
Yes, Thats a BTS7960 board. I tried it out tonight, ran the motor at about half speed for about half an hour. No detectable heating of the motor or the device. Running on a 350 watt 24 volt switcher. Found I needed to do some work on the hal file as I was only getting encoder B output back into the 5i25 encoder.01. Probably have an is_output being applied to one of the gpio's that is an input on the bob. But by then I was beat, so that is tomorrows troubleshooting job. For a full test I need to dummy up a hone switch for an index on the the motor since its not yet mounted on the BS-1. Need to figure out how to put one on it that is still out of the way and protected. Someplace behind the front disk I think, and detect a passing screw with an ATS-667 should work ok. Just have the find the giddy-up to do it. I'm finding that with a 30% pump, my giddy-up goes away too easy. That and make a couple saddles to put the motor in strong enough it won't get knocked coocoo by the choker straps I handle the BS-1 with as its about 200 lbs with the motor and 160mm 3 jaw mounted. Take care and stay well, Dave. > > Its taken way too long, but I may have found the driver I need. > > Miniature board and heat sink for about $13/copy. Has a pair of > > Infineon BTS7960B chips on a pcb about 1.5" square, rated for up to > > 45 volts and 43 amps for each chip and 2 make a full H-bridge. From > > the looks, its not the datasheet hookup, but has a 74HCT244 in tsop > > style for an input buffer. Looks like it needs a ground and 5 volts, > > and probably an enable input, and up and down pwms, mode 2 IOW. > > Needless to say, no example hookups are to be had. But I'm prowling > > around in googles output now. Found them: > > > > <https://www.handsontec.com/dataspecs/module/BTS7960%20Motor%20Drive > >r.pdf> > > > > Interestingly, this one is stated to only be good till 27 volts, not > > the infineon 45 volts. Bridge chips are labeled with an extra B. > > 2nd grade stuffs? Probably. I'll advise how it works when I get it > > wired up. See above, its going to work great once the encoder and pid are programmed. > > Cheers, Gene Heskett > > _______________________________________________ > 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
