Soft Gripper Solution for Leafy Greens Automation | Baby Bok Choy (Small Green Vegetables) Handling Case Study
In modern food and agricultural automation, one of the most difficult tasks is handling leafy greens. Unlike rigid industrial parts, vegetables like baby bok choy (small green vegetables) are soft, uneven, and highly sensitive to pressure.Recently, a customer sent us real samples of small leafy greens to evaluate an automated picking solution. The goal was to design a soft gripper-based system that can gently and reliably handle fresh produce without bruising or damage.
Leafy greens such as baby bok choy present multiple challenges for traditional robotic grippers:
- Soft and delicate leaf structure
- High moisture content and surface sensitivity
- Irregular shape and size variation
- Weak stem structure that can easily break
- High requirement for freshness preservation
Conventional rigid robotic grippers often apply concentrated force, which can crush leaves or damage the product, making them unsuitable for vegetable handling automation
Our engineering team conducted a detailed evaluation of the samples, focusing on real handling conditions found in production environments.
Several gripping approaches were tested to simulate real vegetable packing automation scenarios.
After evaluation, a soft gripper end effector was selected as the optimal solution for leafy green handling.Instead of wrapping the leaves, the gripper is designed to gently grasp the central stem area between the leaves (leaf-stem junction), ensuring a stable pickup point while avoiding direct pressure on the leaf surfaces.This center-point gripping strategy provides a secure and consistent hold on the vegetable’s structure without damaging the surrounding leaves, significantly reducing the risk of bruising or deformation.The result is a stable, controlled, and gentle handling process throughout the entire pick-and-place cycle.
This case highlights a key trend in modern automation: handling natural, delicate products requires adaptability, not force.By using soft gripper technology, manufacturers can significantly reduce product damage while improving efficiency in leafy greens handling and packaging.As food automation continues to evolve, soft robotics is becoming a core enabling technology for reliable, scalable, and gentle vegetable handling solutions.