The problem with trying to buy used motor like that is how do you know what the motor specs are. There is nothing posted on the add, the Electrocraft part numbers are old and obsolete, or are a custom part number so you can't just look them up (at least not easily). What are the motor dimensions, V/rpm constant, max amps, encoder counts... all the important stuff you need to know about a servo before you buy it?
----- Original Message ----- From: "dragon" <tfishw...@gmail.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Monday, February 6, 2017 10:15:36 AM Subject: Re: [Emc-users] need a tutorial on 3 phase, 1.2 degree a step, motors There are several 'sellers' from NES Sales in New York state. I bought a total of 6 from two of them doing a make an offer and they both accepted my offers which ended up at just under $40 each by the time I added shipping. All 6 appear to be in working order, the brushes have little wear, and all of the encoders work, but one is missing the encoder cover. Here is the listing I last purchased from... http://www.ebay.com/itm/122072353227?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT As for drives, it just depends on what you need for current and voltage requirements. If you are running under 80v DC then the AMC B25A8 or B30A8 can be found for as low as $35 + shipping on ebay. There are Copley equivalents as well. I plan to run my DC supply at around 93v after rectification so I will end up spending a bit more as I will need higher voltage amplifiers. I don't mind the extra cost for the increased performance. On 02/06/2017 08:48 AM, John Thornton wrote: > Do you have a link to the $40 servo and $50 drive? All I can find on > fleabay is $52 and up for the servo + $26 to $32 for shipping. > > JT > > > On 2/6/2017 7:27 AM, dragon wrote: >> On another note... you can get E661 servos with encoders off of ebay for >> $40 to your door and they are a great match for your Sheldon. Grab some >> used servo drives for about $50 each depending on your power supply >> situation. > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
