Objective: Sew a saleable patch pocket with mitered corners and clean topstitching by controlling needle position, pivoting, and foot pressure through bulky layers on the Janome MC6650.
Simple straight seams rarely sell a product; buyers notice corners and topstitch consistency. A patch pocket brings together three challenges you now combine. First, mitered corners: fold and press the pocket's seam allowance, then fold each corner diagonally so the two sides meet at a clean 45-degree joint instead of a bulky lump. Second, controlled pivoting: on the MC6650, set the needle to stop in the down position (press the up/down button so the indicator shows needle-down). When you reach a corner, the needle stays buried in the fabric, you lift the presser foot, pivot the work exactly 90 degrees, lower the foot, and continue — the stitch line stays unbroken. Use the adjustable needle position to move the needle left or right so your topstitch sits a consistent 3-6 mm from the folded edge; pair it with the quarter-inch or edge-guide foot for repeatable spacing. Third, bulk management: where folded layers stack at corners, the foot can ride up and skip stitches. Lengthen the stitch slightly (to about 3.0 mm) for crisp topstitching, reduce foot pressure one or two steps via the pressure dial so the feed dogs still grip without crushing layers, and slow down using the speed slider for precision. The MC6650's start/stop button lets you sew hands-free at a controlled speed, and memorizing a fixed stitch length in a pattern-memory slot means every pocket on every item matches.
Example: Make a 12 cm square cotton pocket. Press the top edge under 1 cm then 2.5 cm and topstitch the hem. Press the remaining three sides under 1 cm; at each bottom corner fold the point in diagonally and press so the folds meet in a neat miter. Select straight stitch, set length 3.0, needle-down on, move needle position so the line falls 4 mm from the edge, lower foot pressure one notch. Place the pocket on the garment, start sewing down one side, and 1 cm from the corner stop with needle down, lift foot, pivot 90 degrees, lower foot, continue. Backstitch at start and finish at the top corners (reinforce with a small triangle) for strength. Result: four sharp corners, even 4 mm topstitch, no skipped stitches at the bulky miters.
Try it: Cut one 12 cm fabric square and a scrap backing piece. Press a mitered pocket as described, set the MC6650 to needle-down, stitch length 3.0, and a 4 mm needle offset. Topstitch the pocket onto the backing, pivoting at all four corners with the needle down. Inspect your corners and topstitch distance, then write down which setting (pressure, length, or speed) you would change to improve the next one.