| Quantity: | |
|---|---|
The SGDT350G combines X and Z linear axes with B and C rotary axes for ultra-precision turning of optical and precision components. The use of the B axis and the process plan are evaluated against workpiece geometry and tool access.
SGDT350G machine illustration. Configuration is defined in the technical agreement.
As workpiece geometry or tool orientation requirements become more demanding, rotary-axis configuration, workholding and motion clearance need review. The addition of a B axis must be assessed together with the toolpath, control configuration and acceptance criteria.
SGDT350G uses static-pressure guideways and spindle bearings with linear motor drives. Air spring isolation helps reduce floor-transmitted vibration. The machining capacity is φ650 mm × 300 mm; usable space is checked against the workpiece, workholding, tooling and motion clearance.
Grinding, high-speed milling, fast tool servo and ultrasonic or laser assistance can be evaluated as process options. Machining of complex geometries, spindle/C-axis architecture and interpolation capabilities are confirmed for the selected configuration.
Static-pressure motion system Static-pressure guideways and linear motor drives support a linear-axis positioning repeatability specification of ≤ 0.5 μm, evaluated using the agreed direction and method.
Spindle configuration choices Aerostatic and hydrostatic spindle options offer different speed, load and stiffness specifications for evaluation against the workpiece and process.
Axis configuration A B axis extends the X, Z and C configuration. The B axis uses a hydrostatic bearing and direct-drive torque motor, with angular travel of 0°–360°.
Item | Specification |
Axes | X / Z / B / C |
Machining capacity | φ650 mm × 300 mm |
Linear programming resolution | ≤ 0.01 nm |
Rotary programming resolution | ≤ 0.0000001° |
Larger capacities can be evaluated. Programming resolution is the numerical increment of CNC commands and depends on the selected controller. It is not feedback resolution, positioning accuracy or machining accuracy.
Item | Aerostatic spindle | Hydrostatic spindle |
Speed | Max. 10000 r/min | 0–1500 r/min |
Load capacity | 50 kg | 120 kg |
Axial stiffness | ≥ 350 N/μm | ≥ 600 N/μm |
Radial stiffness | ≥ 130 N/μm | ≥ 200 N/μm |
Rotational accuracy | < 30 nm | < 50 nm |
Workholding | Vacuum chuck | Vacuum chuck |
Spindle options and aerostatic C-axis specifications are listed separately. The C-axis value of 3000 r/min does not apply to the hydrostatic spindle. Maximum load, speed and accuracy are not assumed to apply simultaneously.
Rotational accuracy is a length-based specification. Direction, error components, measurement position and conditions follow the component test definition. It is not angular positioning accuracy.
Item | X | Z |
Travel | 350 mm | 300 mm |
Guideway type | Hydrostatic / aerostatic | Hydrostatic / aerostatic |
Drive | Linear motor | Linear motor |
Positioning repeatability | ≤ 0.5 μm | ≤ 0.5 μm |
Maximum travel speed | 4000 mm/min | 4000 mm/min |
Straightness / test length | 0.3 μm / 300 mm | 0.3 μm / 300 mm |
Repeatability follows the agreed direction and evaluation method. Straightness applies only to the stated test length, without extrapolation. Measurement direction, limit definition and acceptance method follow the technical agreement.
Item | B axis | C axis aerostatic configuration |
Bearing type | Hydrostatic | Aerostatic |
Drive | Torque motor direct drive | Torque motor direct drive |
Maximum speed | 50 r/min | 3000 r/min |
Angular travel | 0°–360° | Configuration-specific |
Axial / radial stiffness | ≥ 800 / ≥ 210 N/μm | Configuration-specific |
Angular positioning repeatability | ≤ 1.0 arcsec | ≤ 1.0 arcsec |
Rotational accuracy | < 100 nm | Configuration-specific |
Item | Requirement or configuration |
Vibration isolation | Air spring isolation |
Reference operating temperature | 20 °C ± 0.5 °C |
Base power supply | Three-phase, five-wire; 380 V; 50 Hz |
Air supply and installation | Clean, dry air; inlet requirements, dimensions and service space are supplied for the selected configuration. |
Applications include flat, spherical and cylindrical optical surfaces and precision components with corresponding ultra-precision surface requirements. Complex geometries require process evaluation of the selected configuration, workholding and toolpath.
Selection focus: assess the B axis against geometry, tool orientation and the process. If the process also requires a Y axis, SGDT350F can be evaluated.
Material | Application conditions |
Aluminum, suitable aluminum alloys and copper | Confirm suitability against composition, condition, tooling and the configured process. |
Nickel, single-crystal silicon and germanium | Subject to application review of the material grade, condition and machining requirements. |
Steel and suitable hard, brittle ceramics | Ultrasonic, laser or combined assistance can be evaluated. Material range and performance are established through sample trials. |
Machining Grinding, high-speed milling, fast tool servo, ultrasonic assistance, laser assistance, combined laser-ultrasonic assistance and in-situ balancing.
Metrology and tool setting Optical measurement and tool setting, contact tool setting and microscope-assisted centering.
Process support Vacuum workholding, zero-point locating, video monitoring, chip collection, mist lubrication, cooling and air treatment / filtration.
These options are subject to confirmation by model and process. The agreed configuration defines the scope of supply.
Left: pure-copper workpiece. Right: 3D display of the stepped microstructure.
Item | Illustrated information |
Material | Pure copper |
Feature | Stepped microstructure |
Step height | 10 μm |
The 10 μm value is a feature height, not machining error, positioning accuracy or surface roughness. The 3D display is not an acceptance report.
The images support discussion of workpiece geometry and process requirements. The source identifies neither the machine nor its axis count, so these images do not establish an SGDT350G four-axis machining result. Suitability requires process review and sample validation.
Review step height and width, edge geometry and permitted corner radius, material condition, workholding datums and measurement methods. Select the machining method and tool for the geometry, then check tool access and motion clearance.
SGDT350G provides X, Z, B and C axes. Use of the B axis, interpolation capability and the need for options such as fast tool servo depend on the target workpiece. The images do not establish simultaneous four-axis interpolation or a machining-accuracy value.
Q1: What is the SGDT350G ultra-precision diamond turning machine?
The SGDT350G is a 4-axis ultra-precision single-point diamond turning machine for optical and precision components. It combines X and Z linear axes with B and C rotary axes and uses static-pressure guideways and spindle configurations, linear motor drives and air-spring vibration isolation.
Q2: What axis configuration does the SGDT350G use?
The SGDT350G uses an X / Z / B / C four-axis architecture. The X and Z axes are linear axes, while B and C are rotary axes. Published linear travel is 350 mm on X and 300 mm on Z.
Q3: How does the SGDT350G differ from the SGDT350?
The SGDT350 uses X / Z / C axes, while the SGDT350G adds a B rotary axis to form an X / Z / B / C four-axis architecture. The published documentation does not state that every operation uses all four axes simultaneously; the final machining strategy depends on the selected configuration and application.
Q4: What materials can the SGDT350G machine?
Published material candidates include aluminum and suitable aluminum alloys and copper. Nickel, single-crystal silicon and germanium require application review. Material suitability depends on composition, condition, tooling and process configuration. Ultrasonic, laser or combined assistance can also be configured for steel and suitable hard, brittle ceramics, subject to sample-trial validation.
Q5: What optical surface forms can the SGDT350G machine?
The brochure lists flats, spheres and cylindrical surfaces. Complex geometries depend on the selected setup, workholding, tooling and process configuration.
Q6: What is the machining capacity of the SGDT350G?
The published machining capacity is φ650 mm × 300 mm. Larger capacities can be evaluated. Actual usable capacity must be checked against the workpiece, workholding, tooling and available motion clearance.
Q7: What are the published B- and C-axis specifications?
The B axis uses a hydrostatic bearing and torque-motor direct drive, with a published maximum speed of 50 r/min and angular travel of 0°–360°. The published aerostatic C-axis configuration uses a torque-motor direct drive with a maximum speed of 3,000 r/min. Angular positioning repeatability is listed as ≤ 1.0 arcsec for both axes under the stated test definitions.
Q8: What process and support options can be configured on the SGDT350G?
Published options include grinding, high-speed milling, fast tool servo, ultrasonic or laser assistance, combined laser-ultrasonic assistance and in-situ balancing. Metrology and support options include optical and contact tool setting, microscope-assisted centering, vacuum workholding, zero-point locating, video monitoring, chip collection, mist lubrication, cooling and air treatment or filtration.
Q9: What representative machining result is published for the SGDT350G?
The brochure shows a φ75 mm / SR250 convex spherical surface machined in high-purity aluminum alloy, with published form error PV ≤ 0.2 μm and roughness Ra ≤ 3.0 nm. These values apply only to the cited case and should not be interpreted as universal guarantees for other materials, geometries or the full machine capacity.
Q10: Does the published CNC resolution represent machining accuracy?
No. The published linear programming resolution is ≤ 0.01 nm and rotary programming resolution is ≤ 0.0000001°, but these values represent CNC command increments. They are not positioning accuracy or machining accuracy.
Q11: What installation conditions are specified for the SGDT350G?
The published reference operating temperature is 20 °C ± 0.5 °C. The base electrical supply is three-phase, five-wire, 380 V, 50 Hz. Clean, dry air is required, and final inlet, dimensional and service-space requirements are supplied according to the selected configuration.
Send the target model SGDT350G, part drawings or a 3D model, material grade and condition, dimensions and weight, form and roughness targets, planned production volume and installation conditions for configuration review and quotation.
Submit part details · Arrange a technical discussion · Request a machine-selection sample trial
