For the new Pfaff 3834 a thread tension control has been developed that automatically adjusts the thread tension to the material thickness currently being handled. The material thickness detection and real-time adjustment (360° monitoring) feature ensures optimum stitch formation, even when sewing over cross-seams and interlinings. By using the roller presser (running close to the needle), the material can be worked in with pinpoint accuracy. Optimal work with a clear view of the sewing material is assured. The new machine guarantees smooth seams and even stitch formation, especially when sewing sensitive and difficult fabrics.

The coated roller presser comes as standard with the machine. Optionally, a cross-toothed roller presser is available, which significantly expands the machine's range of applications. This means that the machine can be switched from fine, delicate fabrics to coarse/heavy, hard fabrics in seconds.

 Further features of the Pfaff 3834:

• Stitch-length and fullness amounts in increments of 1/10 mm (within the seam areas the stitch length can be changed)
• Teach in seam programming – size is free selectable
• Mirrored seam for alternating left or right sleeve
• By entering the grading values the sewing programs for all sizes are called up automatically
• Select starting point of seam is possible

The touch control panel BDF-P1

When sewing in sleeves, the dexterity of the operator plays an important role. The new Pfaff 3834 provides programmed and sensor-supported features that significantly reduce the workload of the user and lead to a better, more reliable sewing performance. These functions can be called up or changed via the control panel:

• Program number input (97 programs)
• Manual correction of the fullness
• Current thread tension value
• New: automatic thread tension regulation
• Manual alteration of the active thread tension value
• Basic stitch length
• Current seam segment length (in millimetre)
• Select garment size
• Automatic change from right to left sleeve is activated
• Display of the current segment

Working methods of sleeve setting ungathered sleeves

Manual method: The operator activates the required fullness by a second pedal, and the fullness is indicated by a bar diagramm on touch-screen control panel. This is recommended for training on the machine and for small batches.

Programmed sleeve setting: The seams are programmed by the teach-in method while sewing in the right sleeve of a basic size. The fullness input by the operator. When the grading values are input, all sizes of a style are automatically saved. The same applies to programming the seam for the left sleeve. An automatic change switches from the right to left sleeve or vice versa.