Long time, long journey, started in 2012, a project semi-finished after six years was completed, and it took not more than one week to be operative: CNC Embroidery is now fully working! Speed is still quite limited by torque of little Nema 17 stepper motor at high revolution speed of the flywheel. More or less actually the maximum speed is 200 stitches per minute, while I believe that with a bigger motor (Nema 23 with 430 oz in) I could reach a speed of 800 stitches per minute. A short video of the machine running with sewing machine internals: Cat size is approximately 3x2 cm (1.2" by 0.8") Following some work in progress experiment: Closeup, nice blue on white Most of the work was related to thread tension requirements. The old machine had a lot of trouble to maintain the correct thread tension. After some disassembly and reassembly, I noted a spring was missing from the thread tensioning system, so a lot of knots and not well pulled sewing thread on the back. The (still not 100%) completed machine: Frame tension setup to accomodate different kind of fabric Frame tension spring Entire setup You will need one of these plastic foot to obtain a good sewing result Brazed brass frame Little motor, do your job! You can find here previous posts, starting from 2012 (most in italian): CNC EMBROIDERY: Borletti, punti perfetti CNC EMBROIDERY: 100 € tondi tondi CNC EMBROIDERY: 100 € tondi tondi CNC EMBROIDERY: L'idea. CNC EMBROIDERY: Borletti, punti perfetti II CNC EMBROIDERY: Brasatura in corso CNC EMBROIDERY: Costruzione xy, parte I CNC EMBROIDERY: Costruzione xy, parte II CNC EMBROIDERY: Costruzione xy, parte III CNC EMBROIDERY: Costruzione xy, almost finished CNC EMBROIDERY: Costruzione xy, parte IV CNC EMBROIDERY: Costruzione xy, parte V CNC EMBROIDERY: sono arrivati i pezzi mancanti CNC EMBROIDERY: elettronica di controllo CNC EMBROIDERY: la base in legno CNC EMBROIDERY: la base in legno, parte II CNC EMBROIDERY: la base in legno, parte III CNC EMBROIDERY: il volantino in legno e la puleggia CNC Embroidery. Elettronica di controllo II EMBROIDERY CNC: Software completed
