How Servo Control Improves VFFS Bag Accuracy and Speed

Older VFFS machines rely on mechanical cams and clutches; modern ones use servo motors. Servo control in VFFS machines makes film feeding, jaw timing and bag length adjustable in software, and Link Machinery has built these machines through 30 years of manufacturing experience.

Why Servo Drive Beats Mechanical Drive

A servo motor positions the film with an encoder and stops within milliseconds. Bag length changes become a number on the touchscreen instead of a gear change, which cuts changeover time dramatically.

Precise Film Feeding

• Servo feeding keeps print registration inside tight tolerance
• Film tension stays stable from roll start to roll end
• Acceleration curves reduce film stretch on thin materials

Jaw Timing and Bag Speed

Because the sealing jaws are also servo-driven, the machine synchronizes film pull and sealing perfectly at high speed. That is how a modern VFFS machine reaches 60–80 bags per minute without losing seal quality.

Easy Diagnostics

Servo drives report errors directly to the HMI, so operators see the fault and fix it fast. Spare servo modules can be swapped in minutes, keeping downtime short.

Ready to upgrade to a servo-driven VFFS line? Contact the Link Machinery team with your product, film and bag size.