Vietnamese engineer builds rubber-tapping robot to replace human labor

Standing more than six feet tall, the machine glides up to a tree in a plantation in southern Dong Nai Province, extending a cylindrical arm that clamps securely around the trunk.

The clamp forms a sturdy guide track as the cutting head pivots smoothly along the curve, slicing a clean groove through the bark. Tam, who founded Tan Y Robot and Rubber, spent four years refining the machine to replicate the work of a seasoned manual tapper. Weighing over half a ton and encased in a rugged metal chassis, the unit operates with a level of cutting force and mechanical precision that exceeds even that of the most skilled human hands.

Tam explained that the machine makes a continuous, unbroken cut—something laborers cannot sustain simply due to physical fatigue. Human tappers typically rely on a stop-start rhythm, pulling the blade an inch or so, pausing to reset their momentum, and slicing forward again. This pulsed motion prevents the knife from digging too deep into the vital wood core or skimming too shallowly and losing sap. Yet every stuttering pause inevitably crushes the delicate latex vessels lining the bark, restricting fluid flow compared to a single, uninterrupted groove.

That fluid advantage showed up clearly during field trials with Dong Nai Rubber Corporation, where the machine drew more than 50% more latex across a test block of 51 trees than human benchmarks.

"Rubber tapping is far better suited to robots than to people," Tam noted.

 

 

Vietnamese engineer builds rubber-tapping robot to replace human labor

Kỹ sư Việt chế tạo robot cạo mủ cao su thay người

Four years of dialing in the cut

Tam first conceived the robot in 2022 after consulting on automation needs with a local rubber company. Harvesting natural latex requires working between 2 a.m. and 5 a.m., when internal tree pressure peaks, across slippery, damp, poorly lit hillsides heavy with carbon dioxide. Over time, harvesters frequently suffer from chronic anemia, skin discoloration, latex allergies, and persistent respiratory problems. Because of these conditions, authorities classify the occupation as hazardous and strenuous, qualifying workers for early retirement.

Off-the-shelf automation options have largely fallen flat. Most rely on standalone gadgets strapped permanently to individual trunks, an approach that balloons capital costs: replacing a single laborer requires over 2,000 separate units running into billions of dong (VND1 billion = US$38,937). Because these compact devices lack power, they depend on vibrating blades to gnaw through the bark, which bruises the capillary ducts and depresses yields.

Drawing on an extensive background in precision machining, Tam and his colleagues set out to design an agile machine that could meaningfully alleviate the severe labor shortages squeezing the sector.

When the team rolled their initial prototype into the groves in late 2022, problems surfaced immediately: the chassis misaligned, cuts wandered off target, and sloping trunks threw the mechanism off entirely.

The initial trials underscored the massive gulf between a motorized cart and a practical replacement for an experienced field hand. The machine had to identify each target tree, dock its arm accurately, and steer the blade across trunks of wildly differing angles, girths, and bark textures.

A model of rubber tapping robot. Photo from Tan Y Robot and Rubber Co., Ltd

The steepest hurdle, Tam said, was stabilizing the knife path. His team only perfected the cutting motion in the middle of this year. The blade must maintain a clearance of just 1 to 1.3 millimeters from the inner cambium, shaving deep enough to fully open the latex vessels without wounding the core. Each pass can peel away only a whisper-thin ribbon of bark, extracting peak volume while safeguarding the productive life of the tree.

Striking that balance is tough even for seasoned veterans. In manual harvesting, workers face docked bonuses or lower pay grades whenever they gouge into the core, leading many to shave cautiously shallow and leave valuable yield behind.

The engineering crew solved this with an adaptive tracking mechanism that hugs the contour of the bark, paired with internal memory that logs individual depth profiles for every trunk. Today, the surface-sensing module limits positional error to under 0.3 millimeters. Both the mechanical assembly and the core cutting method have received exclusive patent protection.

Mechanical strength provides the other major edge. Backed by rigid tracking accuracy, the machine pulls the blade with steady, uninterrupted force, cleanly severing every capillary vessel down the trunk so latex bleeds out smoothly and generously.

Beyond delicate knife control, autonomous navigation, instinctive for humans, posed its own headaches in the field.

Tam said the unit navigates via lidar, mapping distance and angular bearings using laser pulses without needing GPS, holding its parking error to around an inch. Once parked, the robotic arm swings the cutting head into position and begins the incision.

 

 

Vietnamese engineer builds rubber-tapping robot to replace human labor

Kỹ sư Việt chế tạo robot cạo mủ cao su thay con người

Deploying in real world

While the robot yields far more latex, aligning, rolling between trees, and setting up its arm takes time. For now, it remains slower than a nimble worker, clocking about 45 seconds per cycle. The development team is banking instead on millimeter accuracy, reliable depth control, and tireless overnight endurance to bridge the widening deficit of skilled field hands.

Tan Y spokesperson noted that the team is steadily trimming cycle times, targeting a 20-second pace that matches human hands.

Under their operational blueprint, the machines run from 8 p.m. to 6 a.m., working longer shifts than laborers to offset the slower cutting pace. A single technician monitors a fleet of 10 units to troubleshoot mechanical snags. During daylight hours, field hands collect the latex tapped overnight and inspect the cut lines while the robots charge and undergo maintenance.

Tam expects each unit to sell for VND420 million (US$16,500). Operating a 10-unit fleet with accompanying ground staff, the team expected to break even in around 2.7 years.

At the finals of the 2026 Science Innovation Contest, judges highlighted the project's strong market prospects, noting that Vietnam has 300,000 rubber tappers out of 2.5 million globally and chronic labor deficits.

The jury praised the technology for proving how robotics can liberate humans from dangerous and debilitating labor, selecting the design as one of the top five enterprise innovations in the competition.

An updated version of the robot featuring protective casing and a rain canopy. Photo from Tan Y Robot and Rubber Co., Ltd

Following the competition, Tam is seeking outside investment to ramp up production and begin field trials across commercial estates spanning 100 hectares or more.

"This technology has the potential to upend how the industry operates, raising yields to 150% or beyond," he said, acknowledging that winning over commercial plantations would take time as growers rethink centuries-old habits.