When your packaging line stops, every minute costs money. Troubleshooting VFFS machines (Vertical Form Fill Seal machines) is an essential skill for any packaging plant operator or technician. These machines are reliable workhorses, but like any piece of equipment, they can develop issues that disrupt production.
In this guide, we’ll explore the most common VFFS problems and provide step-by-step solutions to get your machine running at full efficiency again.
Pro Tip: Regularly clean and lubricate rollers to prevent build-up that causes misalignment.
While troubleshooting VFFS machines helps fix problems quickly, prevention is always better than a cure. Here’s how to keep your machine in peak condition:
Perform daily cleaning after production runs.
Check wear parts weekly and replace as needed.
Lubricate moving parts according to manufacturer recommendations.
Train operators on correct machine operation and basic troubleshooting steps.
If you need a deeper dive into preventative care, PMMI’s maintenance best practices for packaging machinery offer excellent guidelines for keeping your equipment running reliably.
If you’ve tried these solutions but your VFFS machine is still giving you trouble, it may be time to get expert assistance. Our team specialises in diagnosing and repairing all types of vertical form fill seal machines, ensuring minimal downtime and maximum productivity.
Call us: 082 852 1458
Email us: sales@sapackman.co.za
Visit: https://www.sapackman.co.za/
We’ll help you get your packaging line back up and running quickly — with long-term reliability in mind.
By mastering troubleshooting VFFS machines, you can significantly reduce downtime, extend equipment lifespan, and maintain packaging quality. A proactive maintenance schedule, combined with quick problem-solving skills, ensures your packaging line stays productive and profitable.
If your VFFS machine continues to have recurring issues despite regular maintenance, it may be time to consult a professional technician or consider an equipment upgrade.
Common problems include bags not sealing properly, film tracking issues, inconsistent fill weights, jammed film rolls, incorrect bag length, and unstable production speeds. Most issues relate to settings, worn parts, or incorrect material handling.
Weak seals are often caused by wrong sealing temperature, uneven pressure, dirty sealing jaws, or improper film type. Check the film specifications and adjust the heat and pressure according to the material being used.
Inconsistent fill weights can result from improper calibration, worn dosing parts (auger or multi‑head weigher), product bridging in the hopper, or unstable product flow. Calibrating the filler and ensuring a consistent product feed usually resolves this.
Film tracking issues typically occur when the film is misaligned, the tension is incorrect, or the rollers and guides are worn or dirty. Realign the film, adjust tension, and clean rollers/guides to improve tracking.
Incorrect bag length is usually caused by wrong indexing settings, encoder issues, or miscalibrated pull belts. Check and recalibrate the length settings in the HMI (touchscreen control), and inspect pull belts for wear.
Film wrinkles often happen due to excessive tension, incorrect forming collar installation, or mismatched film width. Reduce tension, check the collar setup, and use film that matches your machine’s specifications.
Film jams are frequently caused by sharp edges on the film roll core, damaged film edges, or rollers with debris. Ensure film edges are clean, core edges are smooth, and rollers are debris‑free.
Unexpected stops may be caused by sensor misalignment, product fall‑back, safety guard switches, or emergency stop activation. Inspect sensors for contaminants, make sure safety interlocks are fully closed, and verify product flow.
Routine cleaning after each shift is ideal. Inspect and clean sealing jaws, forming tubes, film guides, and sensor windows daily. More thorough maintenance (lubrication, belt checks) should follow your service schedule.
Regular maintenance includes:
Tightening loose fasteners
Checking and replacing worn belts and rollers
Lubricating bearings and guides
Calibrating sensors and scales
Cleaning film paths and sealing components
This boosts uptime and reduces troubleshooting needs.
For electrical or control issues, first restart the machine safely, check for loose cables or blown fuses, and review error codes on the touchscreen. If the issue persists, consult your supplier’s support team.
If you’ve tried basic adjustments and the issue continues — especially electrical faults, complex mechanical failures, or recurring error codes — reach out to technical support for guided troubleshooting and spare parts assistance.
