CAM Roller Hollow Rotating Tables

1

Drive unit:

the "source" of power input

The driving unit is usually composed of a servo motor or stepper motor and a reduction mechanism, responsible for providing rotational power. The motor is connected to the camshaft through a coupling or synchronous belt, transmitting rotational motion to the cam mechanism. To meet different load requirements, the drive unit can be paired with motors of different powers (such as 50W~750W servo motors), and the output torque can be increased through reduction ratio design (commonly 1:10~1:100) to meet the needs of light load high-speed or heavy load low-speed scenarios.

2

Cam and roller mechanism: the "gapless guarantee" of the transmission core

This is the core transmission component of the platform, which determines the transmission accuracy and stability. The cam adopts high-precision grinding processing, and the contour curve is designed according to the motion requirements (such as uniform rotation and indexing positioning); Rollers are usually cylindrical or drum shaped, made of high-strength bearing steel (such as SUJ2), and the surface is hardened (hardness ≥ HRC60) to enhance wear resistance. Multiple rollers are evenly distributed on the inner side of the turntable, closely in contact with the cam profile, and driven by the rotation of the cam to drive the turntable to rotate. Due to the surface contact between the roller and the cam, and the elimination of clearance through pre tensioning design, there is almost no return error during the transmission process, and the positioning accuracy can reach within ± 10 arc seconds.

3

Cross roller bearings:

a rigid support "skeleton"

Cross roller bearings are key components that support the turntable. Their internal rollers are arranged in a 90 ° cross pattern, and they can simultaneously withstand radial forces, axial forces, and overturning moments (which are difficult to achieve with ordinary deep groove ball bearings or thrust bearings). The inner ring of the bearing is rigidly connected to the turntable, and the outer ring is fixed on the base. Through interference fit or pre tightening force adjustment, it ensures that the turntable has no significant deformation under high-speed rotation or heavy load. The rigidity can reach 100N/μ m or more, effectively suppressing vibration and deflection.

4

Hollow turntable:

a "channel" for functional integration

The turntable is a circular structure with a hollow hole at the center (usually 20mm~200mm in diameter, can be customized for larger sizes), used to pass through cables, gas pipes, optical fibers, or workpiece positioning axes. The surface of the turntable is equipped with evenly distributed screw holes, which facilitate the installation of loads (such as fixtures, testing equipment, and end effectors of robotic arms). The material is mostly high-strength aluminum alloy (such as 6061-T6) or cast iron, which is anodized or quenched to improve surface hardness and wear resistance.

5

Auxiliary components:

a stable operating 'guarantee system

Including limit sensors (for origin positioning and overtravel protection), dust covers (to prevent dust and coolant from entering), lubrication interfaces (to regularly add lubricating grease to reduce wear), etc. Some high-end models also integrate temperature sensors and vibration monitoring modules to achieve real-time monitoring of operating status, improving equipment lifespan and reliability.

1

Ultra high positioning accuracy and repetitive positioning accuracy

Through the seamless transmission of cam rollers and the rigid support of cross roller bearings, the platform positioning accuracy can be controlled within ± 5~± 30 arc seconds (1 arc second ≈ 0.00028 °), with a repeat positioning accuracy of ≤ ± 5 arc seconds. This accuracy is sufficient to meet micro level requirements such as semiconductor wafer inspection and optical component assembly.

2

High rigidity and load-bearing capacity

Cross roller bearings can withstand radial loads (usually 500~5000N), axial loads (300~3000N), and overturning moments (10~500N • m). With the surface contact transmission of cam rollers, even under heavy loads or high-speed rotation (up to 300rpm), the radial and axial runout of the turntable can be controlled within 0.01mm, ensuring the stability of the machining or testing process.

3

Low noise and smooth operation

Due to the absence of gear meshing impact and friction during the transmission process, the operating noise of the platform is usually ≤ 60dB (equivalent to normal conversation volume), and the vibration acceleration is ≤ 0.1g, making it suitable for environments such as medical equipment and laboratory instruments that are sensitive to noise and vibration.

4

Integration convenience of hollow structure

The central hollow hole allows pipelines to pass directly through, avoiding the motion limitations caused by pipeline entanglement in traditional rotating platforms and simplifying equipment wiring design. For example, in automated welding equipment, welding wire and protective gas tube can be directly connected to the welding gun through hollow holes, reducing pipeline interference problems.

Series

CAM roller type hollow rotating platforms

Model

TMW68

TMW90

TMW115

TMW215

TMW315

TMW415

Photos

Design load (kgs)

≤80kgs

≤280kgs

≤500kgs

≤1600kgs

≤2.5Tons

≤4.5Tons

Max dia of rotating plate(mm)

≤ 500 mm

≤ 900 mm

≤ 1200mm

≤ 2000mm

≤ 2500mm

≤ 3000mm

Motor type

Planetary gear+Servo motor

Planetary gear+Servo motor

Planetary gear+Servo motor

Planetary gear+Servo motor

Planetary gear+Servo motor

Planetary gear+Servo motor

Motor in configuration

0.4kw/0.75kw

80 flange Servo

80/130 flange Servo

130/180 flange Servo

180 flange Servo

180 flange Servo

Reduction ratio of rotating body

1:20i

1:20i

1:20i

1:40i

1:60i

1:60i

Overturning moment

400 N.m

625N.m

1028N.m

3500N.m

14000 N.m

30000 N.m

Allowable input torque

≤30 Nm

≤72 Nm

≤90 Nm

≤500 Nm

≤500 Nm

≤500 Nm

Rated output torque

≤600 N.m

≤1440 N.m

≤1800 N.m

≤20000 N.m

≤30000 N.m

≤30000 N.m

Allowable moment of inertia

75N.m

220 N.m

260 N.m

18000 N.m

Allowable input speed

2000 R/min

2000 R/min

2000 R/min

1200 R/min

2000 R/min

2000 R/min

Repeat positioning accuracy

±5 arc-sec

±5 arc-sec

±5 arc-sec

±5 arc-sec

±5 arc-sec

±5 arc-sec

Positioning accuracy

±10 arc-sec

±10 arc-sec

±10 arc-sec

±10 arc-sec

±10 arc-sec

±10 arc-sec

Platform concentricity

0.02mm

0.02mm

0.02mm

0.02mm

0.02mm

0.02mm

Platform Parallelism

0.02mm

0.02mm

0.02mm

0.02mm

0.02mm

0.02mm

Accuracy life

20000 ( intermittent motion )

Structure type

Cam roller+cross roller bearing

Protection Grade

IP50

IP50

IP50

IP50

IP50

IP50

Weight (kg)

16kgs

24

45

120

200

300

Driver and Cable

Driver and cable provided if Motor provided by Tallman Robotics Limited (Usually, we configure Delta, Inovance )

Face rotating Plate

Provided if needed.(Drawing provided by the clients)

Sensors

Photoelectric sensor, brackets, sensor plates, screws are for options.

1

3C electronic manufacturing:

the core of precision assembly and testing

In the production of electronic products such as mobile phones and computers, platforms are used for PCB board indexing and positioning (such as angle adjustment during drilling and mounting), screen module bonding and alignment (repeated positioning accuracy needs to be ≤± 10 arc seconds), and camera lens assembly (ensuring optical axis alignment). For example, in the assembly wiring of a certain mobile phone manufacturer's camera module, the platform drives the module to rotate to different angles, and cooperates with the visual system to achieve high-precision bonding of lenses and sensors, resulting in a yield rate of over 99.5%.

2

Numerical Control Machine Tools and Machining Centers:

The "Precision Responsibility" of the Fourth Axis

As the fourth rotation axis of CNC machine tools, the platform can drive workpieces to achieve multi angle machining (such as milling, drilling, carving), especially suitable for the machining of complex curved parts (such as molds, aviation components). For example, in the processing of small precision molds, the platform drives the rotation of the mold blank and, in conjunction with the spindle, achieves 360 ° no dead angle cutting, with a processing accuracy of ± 0.005mm.

3

Medical equipment:

stable guarantee for precise operation

In medical testing instruments such as biochemical analyzers and CT equipment, the platform is used for rotating and dividing the sample tray to ensure accurate switching of samples between different testing stations; In surgical robots, the platform serves as a joint rotation unit to achieve fine adjustment of surgical instruments (such as angle control in laparoscopic surgery), avoiding the impact of mechanical vibration on surgical accuracy.

4

Semiconductor and Photovoltaic Manufacturing:

A Key Link in Micro scale Control

In semiconductor wafer inspection equipment, the platform drives the wafer to rotate and, in conjunction with a laser detector, completes surface defect scanning with a positioning accuracy of ≤± 5 arc seconds; In the string welding equipment of photovoltaic cells, the platform realizes the rotation and alignment of the cells, ensuring precise contact of the welding electrodes and improving the conversion efficiency of the cells.

5

Packaging and labeling equipment:

an efficiency engine for high-speed positioning

In high-end packaging production lines (such as cosmetics and pharmaceutical packaging), the platform drives the rotation of packaging boxes and cooperates with labeling machines to complete multi-faceted labeling (such as circumferential labeling of cylindrical containers). The operating speed can reach 200rpm and the labeling accuracy is ± 0.1mm, meeting the aesthetic requirements of high-end packaging

Case

Requirement

Solution

Effect

A certain automotive electronic sensor assembly line

To achieve precise assembly of sensor chips and metal shells, it is required that the alignment error between the chip pins and the shell interface be ≤± 0.02mm, and the assembly cycle time be ≤ 2 seconds per piece.

Adopt a cam roller hollow rotating platform with a load of 100kg and a positioning accuracy of ± 10 arc seconds, paired with a visual positioning system. The platform drives the shell to rotate to the assembly station. After the visual system recognizes the pin position, the platform adjusts the angle to achieve precise alignment, and then the mechanical arm completes the press fit.

The assembly error is controlled within ± 0.015mm, the cycle time is stable at 1.8 seconds per piece, and the equipment utilization rate is increased to 98%.

A certain optical lens testing equipment

To test the sphericity and refractive index uniformity of the lens, the lens needs to pause every 5 ° within a 360 ° range, with a vibration of ≤ 0.001mm at the moment of pause.

Choose a high rigidity cam roller hollow rotating platform, achieve indexing positioning through servo motor closed-loop control, and reduce external vibration interference with a shock-absorbing base.

The vibration amplitude during each pause is ≤ 0.0008mm, and the repeatability error of the detection data is ≤ 0.5%, meeting the requirements of high-precision optical detection.