Pressure Figure

Product Description

What is it?

In modern textile drafting systems (e.g., Ri-Q-Draft, Texparts, Accord, Top Weighting Arm), the pressure figure refers to the amount of pressure (in daN or kgf) applied by the top arm to press the top roller against the bottom roller to grip the fiber during drafting.

Common Pressure Figures (Reference Table):

1 daN (decaNewton) ‰ˆ 1.02 kgf

Why Pressure Figure is Important?

• Ensures uniform drafting and fiber control
• Avoids roller slippage
• Maintains consistent yarn quality
• Prevents roller damage if set too high

Pressure Figure in Flyer (Speed Frame)

Some people refer to "pressure figure" when talking about flyer presser tension €“ the downward force applied by the presser arm on the roving bobbin to control winding tension.

• Adjustable by spring or screw
• Too much pressure = compressed roving
• Too little = uneven winding

Air Pressure Figure in Pneumatics

If your machine uses pneumatic controls (like auto doffing, suction, or pressurized arms), the €œpressure figure€ may refer to:

• Suction pressure: ~ -0.5 bar to -0.7 bar
• Doffing air pressure: 4 to 6 bar (standard)
• Air consumption: Varies by brand/machine

How to Identify or Adjust Pressure Figures

• Check machine manual €“ Rieter, LMW, or Zinser provide charts.
• Use pressure gauge €“ mounted on pneumatic top arms.
• Digital top arms €“ show pressure digitally or via color-coded rings.
• Use torque wrench or weight scale (for mechanical settings)