A friend of mine has refurbished a number of sewing machines with them. You can’t tell by looking at them whether they are induction or synchronous motors, but i suppose it doesn’t matter. Original equipment on industrial sewing machines usually involve some sort of clutch or belt tension device for stop-go control. This is a big improvement. It is low noise and Just Works. The controller has a robust lever that you hook up to your treadle.
Problem for me is they are 6 times the power and size that I need. A bit of searching on compact power supplies led me to this: https://nexgenpowersystems.com/solutions/compute-solutions/ 1” thick, 3.8” square 240W power supply. Their advertised secret sauce is gallium nitride transistors, allowing them to bring switching speeds to over 2MHZ, which leads to smaller inductors and capacitors. Anyone know where I can buy something like this? Thaddeus > On Apr 26, 2023, at 10:06 AM, Roland Jollivet <roland.jolli...@gmail.com> > wrote: > > 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 > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
