Y-Axis Carriage for Bridge and Gantry Machines

Product Specifications

Technical details and manufacturing context for Carriage (Y-axis)

Definition

The carriage (Y-axis) is a critical linear motion component within a bridge or gantry machine structure. It is mounted on the bridge (X-axis) and moves perpendicularly along the Y-axis, providing the second axis of motion. Its primary function is to precisely position the tool head (in machining applications) or the workpiece (in positioning systems) in the horizontal plane. It forms the intermediate link between the X-axis bridge and the Z-axis spindle or tool holder. The carriage is typically constructed from cast iron, welded steel, or aluminum alloy, depending on the required stiffness, damping, and weight. It travels along precision linear guides (rails) mounted on the bridge structure, with motion provided by a ball screw or linear motor coupled to a servo drive system. Position feedback is achieved through linear or rotary encoders, enabling closed-loop control for high-precision positioning. The carriage's travel length typically ranges from 500 to 3000 mm, with a maximum load capacity of 500 to 2000 kg, including the tool head and workpiece. Positioning accuracy is typically ±0.01 to ±0.05 mm, and repeatability is ±0.005 to ±0.02 mm, per ISO 230-2. Maximum travel speed is 10 to 30 m/min, limited by the servo and guide system. Guide rails are typically linear roller type for heavy loads. The drive system can be a ball screw for cost-effectiveness or a linear motor for higher speed. Operating temperature range is 0 to 45 °C, and ingress protection is IP54 to IP65 per IEC 60529. Materials may include HT250 cast iron or 45# steel, per GB/T 9439 or GB/T 699. The carriage weight ranges from 150 to 800 kg, affecting inertia and motor sizing. Lubrication is typically automatic grease to reduce maintenance. These values are directory reference ranges and must be confirmed for the actual model and application with the legal manufacturer or supplier.

Working Principle

The carriage is driven along precision linear guides (rails) mounted on the bridge structure. Motion is typically provided by a ball screw or linear motor coupled to a servo drive system. Position feedback is achieved through linear encoders or rotary encoders on the motor/drive screw, allowing for closed-loop control and high-precision positioning along the Y-axis. The servo drive interprets command signals and adjusts motor torque to achieve the desired position, velocity, and acceleration. The linear guides support the load and ensure smooth, low-friction movement. The ball screw converts rotary motion to linear motion, while a linear motor directly generates linear force. Encoders provide real-time position data, which is compared to the commanded position, and any deviation is corrected by the control system. This closed-loop operation ensures accurate and repeatable positioning, essential for precision machining or positioning tasks.

Common Materials

Cast Iron, Welded Steel, Aluminum Alloy

Technical Parameters

Parameter	Typical range	Notes & selection driver
Travel Length	500–3000 mm	Customizable per machine size
Maximum Load Capacity	500–2000 kg	Includes tool head and workpiece
Positioning Accuracy	±0.01–±0.05 mm	Higher accuracy for precision machiningISO 230-2
Repeatability	±0.005–±0.02 mm	Critical for consistent partsISO 230-2
Maximum Travel Speed	10–30 m/min	Limited by servo and guide system
Guide Rail Type	Linear roller	Roller guides for heavy loads
Drive System	Ball screw or linear motor	Ball screw for cost, linear motor for speed
Operating Temperature	0–45 °C	Outside range may affect lubrication
Ingress Protection	IP54–IP65	Higher IP for dusty or wet environmentsIEC 60529
Material	HT250 or 45# steel	Cast iron for damping, steel for strengthGB/T 9439 or GB/T 699
Weight	150–800 kg	Affects inertia and motor sizing
Lubrication Method	Automatic grease	Reduces maintenance

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Carriage Body/Base Part
The main structural element that provides rigidity and mounting points for other components.

Material: Cast Iron or Steel
Linear Guide Blocks
Precision bearing blocks that interface with the linear rails on the bridge, enabling smooth, low-friction motion.

Material: Steel with Polymer/Composite Sliders
Ball Screw Nut Bracket Part
Mounting point that connects the carriage to the ball screw nut, translating rotary screw motion into linear carriage movement.

Material: Steel
Way Covers (Bellows) Part
Protective covers that shield the linear guides and screw from chips, coolant, and debris.

Material: Rubber, Polyurethane, or Fabric-reinforced Elastomer
Linear Motor Optional
Drives the carriage directly on linear-motor builds, so no screw is in the path.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Machine Structure (Bridge/Gantry)

View system integration details

Manufacturers of Carriage (Y-axis)

Manufacturer profiles associated with Carriage (Y-axis).

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Frequently Asked Questions

What is the primary function of the Y-axis carriage?

The Y-axis carriage moves along the Y-axis of a bridge or gantry machine, carrying the tool head or workpiece to provide precise positioning in the horizontal plane. It is the intermediate link between the X-axis bridge and the Z-axis spindle or tool holder.

What materials are commonly used for the carriage?

Common materials include cast iron, welded steel, and aluminum alloy. Specific grades such as HT250 cast iron or 45# steel may be used, as referenced in GB/T 9439 or GB/T 699. The choice depends on required stiffness, damping, and weight.

How is the carriage driven and controlled?

The carriage is driven by a ball screw or linear motor coupled to a servo drive system. Position feedback is provided by linear or rotary encoders, enabling closed-loop control for high-precision positioning along the Y-axis.

What are typical performance ranges for the carriage?

Typical ranges include travel length 500–3000 mm, maximum load capacity 500–2000 kg, positioning accuracy ±0.01–±0.05 mm, repeatability ±0.005–±0.02 mm, and maximum travel speed 10–30 m/min. These are reference ranges and must be confirmed for the specific model.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	N/A (mechanical component)
other spec:	Max load capacity: 500-5000 kg, Travel speed: 0.1-5 m/s, Positioning accuracy: ±0.01-0.1 mm
temperature:	-20°C to 80°C

Carriage (Y-axis)

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards