Actually, many of the sewing machine motors are now BLDC, with a controller containing one of those power bricks. Here's one of the motors <https://www.google.com/imgres?imgurl=https%3A%2F%2Fae01.alicdn.com%2Fkf%2FHTB1orD5Xx_rK1RkHFqDq6yJAFXa6%2FSewing-Machine-Energy-Saving-Servo-Motor-Instead-Clutch-Motor-600W-AX-WX600-Y.jpg_.webp&tbnid=pnoAKRzn81xI6M&vet=12ahUKEwj5y_ui58f-AhUpTUEAHST9C18QxiAoBHoECAAQGA..i&imgrefurl=https%3A%2F%2Fwww.aliexpress.com%2Fi%2F32885904802.html&docid=BY86wNeRkzJ67M&w=1000&h=694&itg=1&q=sewing%20machine%20motor&client=firefox-b-d&ved=2ahUKEwj5y_ui58f-AhUpTUEAHST9C18QxiAoBHoECAAQGA>
They could be used as a spindle, but often the casing is so customised that the re-work wouldn't be worth the effort. Like this one <https://www.google.com/imgres?imgurl=https%3A%2F%2Fsc04.alicdn.com%2Fkf%2FHTB1e.ismZnI8KJjSsziq6z8QpXaZ.jpg&tbnid=1uvdSuSm7-cB4M&vet=12ahUKEwjC_6SE6Mf-AhVBM8AKHSUjBrMQxiAoBHoECAAQJQ..i&imgrefurl=https%3A%2F%2Fwww.alibaba.com%2Fproduct-detail%2FIndustrial-sewing-machine-clutch-motor_1708595049.html&docid=q_Tzxb1xHED4AM&w=800&h=800&itg=1&q=sewing%20machine%20motor&client=firefox-b-d&ved=2ahUKEwjC_6SE6Mf-AhVBM8AKHSUjBrMQxiAoBHoECAAQJQ> Re-working might be worth it if you buy it as used. Buying as new wouldn't be worth it. Roland On Tue, 25 Apr 2023 at 19:37, Chris Albertson <albertson.ch...@gmail.com> wrote: > For my robotics application, I'm drivnjg 100+ W BLDC motors with a driver > that is maybe one square inch. All you need are 6 mosfets and a tiny > microcontroller. I have a larger one that handles 50 amp per phase and it > is about 6 sq. in. Look at the typical drone, there are four 100+ W BLDC > motors and four drivers are 35 mm square and handle four motors. Stuff > designed for the machine tool wold assumes you have apple space and power. > Stuff designed to fly is typically very light and small. > > In any case, what it seems like you need is maybe a sewing machine motor. > They are NOT "BLDC", work on line voltage and the speed is controlled by > something like a light dimmer. > > On Tue, Apr 25, 2023 at 8:07 AM gene heskett <ghesk...@shentel.net> wrote: > > > On 4/25/23 09:27, Thaddeus Waldner wrote: > > > What I mean is that specific driver would not fit into my space. I am > > currently using a custom 24v BLDC driver that I built. But the only > option > > for power supply at this point is a wall wart that is about twice the > size > > of your typical laptop charger, which I’d like to eliminate. > > > > > > > I'm with Todd, confused. > > The psu for such a motor all by itself would be smaller than the psu for > > the typical 3d printer, but that is still going to be bigger than the > > driver, which for one of the motors I'm thinking of needs a length of > > 118mm, a depth from mount face to terminals of 86mm, and thickness of > > 34mm, part of which is heat sink it does not need unless working really > > hard. > > > > These new drivers can function with up to 90 volts, delivering 5 to 6 > > amps into the motor, dependent on the detected error. Motor current is > > not fixed, but varies with the detected error so the motor normally runs > > dead cool, much more energy efficient than std 2 phase steppers. This is > > the power that spins the electrical meter determining your monthly power > > bill. The error, if only 1 count between the step-gen count and the > > encoder, feeds less than an amp to the motor, 2 count error, maybe an > > amp, 10 counts, 4 amps. This is micron accuracy in most direct drive > > situations. Their speed limit is more likely to be determined by the > > speed of the opto-isolators in the drive input circuitry. Testing these > > motors just laying on the table with no load, I've run them with a > > function generator at 375 kilohertz! At a /8 microstep, that's over 3000 > > revs at 24 volts. At 90 volts, it might be possible to hit the 5000 revs > > and still have usable torque to turn the load. > > > > It might take another box to contain the psu and driver, but I think the > > motor itself is capable to doing the job. Wired into hal correctly, a 5 > > micron error will stop linuxcnc in a millisecond. Tested, works, but has > > yet to occur doing a job. Currently the driver costs more than the > > motor, but I suspect that will equalize and lower once the NRE costs > > have been recovered, say about a year from now. > > > > Bleeding edge tech usually has a bleeding edge price... TANSTAAFL. > > > > >> On Apr 25, 2023, at 7:00 AM, Todd Zuercher <to...@pgrahamdunn.com> > > wrote: > > >> > > >> I'm a little confused, a BLDC motor is still going to need a > > drive/driver, weather or not it runs at line voltage, that you say you > > don't have space for. How is that going to help you? > > >> > > >> Todd Zuercher > > >> P. Graham Dunn Inc. > > >> 630 Henry Street > > >> Dalton, Ohio 44618 > > >> Phone: (330)828-2105ext. 2031 > > >> > > >> -----Original Message----- > > >> From: Thaddeus Waldner <thadw...@gmail.com> > > >> Sent: Monday, April 24, 2023 5:40 PM > > >> To: Enhanced Machine Controller (EMC) < > emc-users@lists.sourceforge.net> > > >> Subject: [Emc-users] Medium voltage BLDC motor > > >> > > >> [EXTERNAL EMAIL] Be sure links are safe. > > >> > > >> HI, > > >> > > >> I have an application where I need a NEMA 23-size 80-120 watt > brushless > > DC motor. The machine housing doesn't have space for a 100w DC 24v power > > supply, so I would like to use a controller and motor that runs at line > > voltage. > > >> > > >> Does anyone know of a small BLDC/PMAC/Synchronous AC motor that is > > designed to run at about 150v coil voltage? > > >> > > >> Motors this size/voltage are apparently quite common in kitchen > > appliances that use pumps or fans, but I cannot seem to find a plain > motor > > with output shaft. > > >> > > >> > > >> > > >> Thanks, > > >> > > >> Thaddeus Waldner > > >> > > >> _______________________________________________ > > >> 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 > > > > > > > > > > > > _______________________________________________ > > > 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, 1940) > > If we desire respect for the law, we must first make the law respectable. > > - Louis D. Brandeis > > Genes Web page <http://geneslinuxbox.net:6309/> > > > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > -- > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > 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
