Singer Special Discs

thingiverse

I recently acquired a Singer 670G Golden Panoramic Touch & Sew vintage sewing machine, quite a mouthful indeed! Beyond being incredibly sturdy and strong, all-metal construction (no plastic gears!), another fascinating aspect of this machine is its utilization of Special Discs for creating advanced stitch patterns. The discs themselves are remarkably simple, prompting me to print some immediately. Not wanting to reinvent the wheel, I googled around a bit and landed on Leila's blog Grow Your Own Clothes, https://growyourownclothes.com/2017/10/11/3-step-zig-zag-disc-for-singer-slant-machines/, where she graciously shared her basic template. This inspired me to create my own version in OpenSCAD for easier experimenting. Stitch patterns are created by editing a few lines like shown below, with the needle position being "1". Each disc has 24 positions, requiring patterns to align properly to repeat. // Overedge stitch, stretch overcast_zz_short = [ "1........", // 1 "..1......", // 2 "1........", // 3 "..1......", // 4 "1........", // 5 "........1", // 6 "1........", // 7 "..1......", // 8 "1........", // 9 "..1......", // 10 "1........", // 11 "........1", // 12 "1........", // 13 "..1......", // 14 "1........", // 15 "..1......", // 16 "1........", // 17 "........1", // 18 "1........", // 19 "..1......", // 20 "1........", // 21 "..1......", // 22 "1........", // 23 "........1", // 24 "Overcast", // Name "zz short", // Name line 2 4 // Number of steps to rotate pattern ]; Bottom and top finish are not crucial since the needle position follower only touches the edge. These discs should function in 400, 500, 600, and 700 series machines; however, always try slowly with the hand wheel first. Feel free to experiment with your own patterns, but please post them here for others to use.