Servo hoists for robot assembly and test labs

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FullSharp · since 1991

Quick answer: FullSharp supplies servo hoists and inverter hoists running on ceiling rail systems for humanoid robot production, assembly and test rooms in Taiwan and Vietnam. Servo hoists position from centimetres down to millimetres, lift smoothly and offer a float mode for assembling joints, hands and bodies; inverter hoists offer flexible speed control and high duty cycles for walking, load and fall tests. Many robot companies in Vietnam have chosen FullSharp as their partner for overhead support systems for moving robots.

Why robot production and test labs need servo hoists

Humanoid robots have a high centre of gravity and many expensive joints, sensors and cables. During assembly the robot cannot stand on its own; during walking, load or fall tests it can topple at any moment. A small impact can damage a joint module, a dexterous hand or a camera. Robot labs therefore need an overhead support system: wherever the robot goes, the hook follows, lifting smoothly and stopping exactly where needed.

FullSharp solves this with two types of hoist running on ceiling rails: servo balancing hoists for precision work and inverter hoists for high-intensity testing. FullSharp is installing these systems in robot production, assembly and test rooms in Taiwan and Vietnam.

Servo hoists: precise assembly without impact

A servo hoist uses a servo motor and closed-loop control, so speed and position are controlled continuously instead of simply switching on and off. In a robot assembly room this gives:

Fine positioning: height adjustment from centimetres down to millimetres for joining joints and mating the torso to the legs.
Soft acceleration and deceleration: no jerk or swing at the start or end of a lift.
Float mode: the operator guides the load by hand and the hoist follows, as if the part were weightless.
Suited to high-value parts: dexterous hands, joint modules, battery packs, robot bodies and final assembly.

Servo hoists above a humanoid robot assembly line

Servo hoists supporting robots at operation and training stations

Servo hoists and safety lines covering a robot training area

Inverter hoists: load capacity and endurance in the test room

In testing and reliability validation, inverter hoists come into their own. The inverter allows lifting speed to be set across a wide range with smooth starts and stops, so many load and speed conditions can be simulated. The hoist provides a safety tether during long walking tests, load tests and fall tests, and lifts the robot back up after each run. The design handles high duty cycles for continuously repeated tests.

Criterion	Servo hoist	Inverter hoist
Control	Closed-loop servo, position and speed control	Inverter, adjustable speed range
Accuracy	High, centimetres to millimetres	Sufficient for support and lifting
Float mode	Yes, follows a light push by hand	No, pushbutton control
Best stage	Joints, hands, bodies, final assembly	Walking, load, fall and endurance tests
Main benefit	Smooth, precise, protects costly parts	Durable, high duty cycle, cost-effective

Ceiling rail systems covering the whole robot lab

Hoists only reach their full value on a rail system that covers enough area. FullSharp designs ceiling-mounted rail systems with bridges travelling in two directions, covering assembly and test zones so the hoist and hook follow the robot wherever it moves. The rails take no floor space, leaving open lanes for walking practice and for engineers. Long test corridors can use light aluminum rails that install quickly and look clean. Power runs along the rail through conductor bars or festoon cables, with no cables on the floor.

Many robot companies in Vietnam have already chosen FullSharp as their partner for overhead support systems for moving robots, from site survey and rail design to installation and operator training.

FullSharp ceiling rail system covering a robot assembly room, with bridges travelling in two directions

A row of FullSharp servo hoists on steel rails, one hoist for each assembly station

FullSharp aluminum rail and servo hoist along a robot walking test corridor

FullSharp servo hoist supporting a humanoid robot during walking practice

How to plan a support system for a robot lab

Step 1: determine the weight of the robot and the heaviest parts, plus the lifting frame and safety lines.
Step 2: split the stages: precision assembly on servo hoists, repeated testing on inverter hoists.
Step 3: measure the area to cover and the ceiling height, and check whether the ceiling can carry load to choose ceiling rails or a freestanding frame.
Step 4: size the number of hoists by workstation so each engineer has a hoist and nobody waits.
Step 5: plan the power supply, control pendants and emergency stop positions in advance.

Safety note: always use latched hooks and correctly rated slings, check brakes and travel limits before each test shift, and never stand under a robot being lifted.

Frequently asked questions

How is a servo hoist different from a standard electric hoist?

A servo hoist uses closed-loop control, so position and speed are controlled continuously, lifting is smooth, stops are precise and a float mode is available. A standard electric hoist runs on pushbuttons at one or two speeds.

Why does a robot test room need an overhead support system?

During walking, load or fall tests a robot can topple unexpectedly. The support system catches it before it hits the floor, protecting joints and sensors, and lifts it back up quickly after each run.

Should a robot lab use servo hoists or inverter hoists?

Use servo hoists for precision assembly and inverter hoists for repeated, high-duty testing. Many labs run both on the same rail system.

Can hoist rails be installed on an office ceiling?

Yes, if the ceiling structure can carry the load; FullSharp surveys the ceiling before design. If not, a freestanding frame can be used.

Does FullSharp install robot support systems in Vietnam?

Yes. FullSharp has a factory in Hai Phong and an office in Binh Duong, and has installed hoist and rail systems for many robot companies in Vietnam.

Send FullSharp the lab layout, ceiling height, robot weight and the number of assembly and test stations to be covered, and our engineers will survey the site and propose the rail layout and the number of servo and inverter hoists.

Request a site survey See servo balancing hoists

FullSharp servo hoists for humanoid robot assembly and test labs