Se coloca el carrete de hilo en el soporte superior y se usa la devanadora lateral para llenar la bobina pequeña que irá en la parte inferior.
En modelos como la Rapida , existen palancas o diales laterales que controlan el ancho, largo y tipo de puntada (recta, zigzag o decorativa mediante levas/discos). máquina de coser wertheim como funciona
| System | Function | How It Works on a Wertheim | |--------|----------|----------------------------| | | Engages/disengages needle movement | Pulling the handwheel out (or turning a knob) disengages the needle for bobbin winding. | | Needle Bar | Moves needle up/down | Driven by crankshaft from handwheel. | | Thread Take-Up Lever | Controls thread tension & pulls stitch tight | Moves in sync with needle – down as needle goes down, up as needle rises. | | Tension Discs | Controls upper thread tightness | Thread passes between two spring-loaded discs. Knob adjusts pressure. | | Bobbin & Case | Holds lower thread | Fits into shuttle hook under needle plate. Spring tension controls bobbin thread. | | Feed Dog Mechanism | Moves fabric | Eccentric cam under machine moves the feed dogs in a rectangle pattern. | | Stitch Length Regulator | Changes stitch length | Adjusts how far the feed dogs travel forward each cycle. | | Stitch Width (Zigzag models) | Moves needle side-to-side | A cam mechanism shifts the needle bar horizontally when you select a stitch pattern. | Se coloca el carrete de hilo en el
| Feature | Older Wertheim (pre-1970s) | Modern Wertheim (Singer/Pfaff era) | |---------|----------------------------|--------------------------------------| | | Oscillating hook (swings back/forth) | Rotary hook (full circle) – quieter, faster | | Stitches | Straight stitch only, or basic zigzag | Multiple built-in stitches (cams or electronic) | | Bobbin | Class 15 or 66 (metal) | Class 15 plastic or drop-in (transparent) | | Motor | External belt-driven clutch motor | Built-in electronic speed control | | Tension | Front dial or external discs | Front dial with color-coded guides | | | Needle Bar | Moves needle up/down
Ubicado a la derecha, permite subir y bajar la aguja manualmente. Importante: Siempre debe girarse hacia el usuario para evitar enredos de hilo.
El núcleo de una Wertheim es un sistema de transmisión de movimiento sincronizado: