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The SGDT350F combines X, Y and Z linear axes with B and C rotary axes for ultra-precision machining of optical and precision components. Workpiece geometry, tool access and machining method determine how the axes and optional modules are used.
SGDT350F machine illustration. Configuration is defined in the technical agreement.
Complex surfaces and multiple machining processes may require a combination of linear travel, rotary motion and auxiliary modules. Selection requires checks on tool access, motion clearance, material suitability and measurement methods. Axis count alone does not establish process capability.
SGDT350F 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 The configuration includes a Y axis with 150 mm travel and a B rotary axis. The hydrostatic Y-axis option includes adaptive pneumatic counterbalance.
Item | Specification |
Axes | X / Y / 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 | Y | Z |
Travel | 350 mm | 150 mm | 300 mm |
Guideway type | Hydrostatic / aerostatic | Hydrostatic / aerostatic | Hydrostatic / aerostatic |
Drive | Linear motor | Linear motor | Linear motor |
Positioning repeatability | ≤ 0.5 μm | ≤ 0.5 μm | ≤ 0.5 μm |
Maximum travel speed | 4000 mm/min | 2000 mm/min | 4000 mm/min |
Straightness / test length | 0.3 μm / 300 mm | 0.3 μm / 150 mm | 0.3 μm / 300 mm |
Vertical-axis balance | — | Adaptive pneumatic counterbalance | — |
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: define the roles of Y and B in the process and check travel, tool access and interference. A five-axis configuration does not imply simultaneous five-axis interpolation for every process.
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: off-axis mirror. Right: reference machining setup.
Process planning for off-axis optical surfaces requires review of the surface definition, workholding position and tool clearance. The images illustrate workpiece geometry and a machining setup. Appearance alone does not establish material, surface equation, finished accuracy or machine axis count.
The source identifies neither the machine nor its axis count. These images are not evidence of an SGDT350F five-axis machining result or acceptance.
Provide the surface equation or 3D model, clear aperture, off-axis distance, material grade, workholding datums, and form and roughness targets. Review tool access, motion clearance and axis travel before selecting the machining method.
SGDT350F combines X, Y, Z, B and C axes. The roles of Y and B, interpolation and optional modules are confirmed for the process. An off-axis mirror does not inherently require simultaneous five-axis machining.
Define the measurement datum, evaluation area, surface fitting and removed terms, and measurement method. APEX can coordinate machine selection and sample validation using the part data. The technical agreement and contract define final specifications and delivery scope.
Q1: What is the SGDT350F ultra-precision diamond turning machine?
The SGDT350F is a 5-axis ultra-precision single-point diamond turning machine for optical and precision components. It combines X, Y 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 SGDT350F use?
The SGDT350F uses an X / Y / Z / B / C five-axis architecture. Published linear travels are 350 mm on X, 150 mm on Y and 300 mm on Z. The B and C axes provide rotary motion.
Q3: How does the SGDT350F differ from the SGDT350 and SGDT350G?
The SGDT350 uses X / Z / C axes, the SGDT350G uses X / Z / B / C axes, and the SGDT350F adds a Y linear axis to form an X / Y / Z / B / C five-axis architecture. The published documents define the axis architecture but do not claim that every machining operation uses all axes simultaneously.
Q4: What materials can the SGDT350F machine?
Published material candidates include aluminum and suitable aluminum alloys and copper. Nickel, single-crystal silicon and germanium are subject to application review. Suitability depends on composition, material condition, tooling and process configuration. Ultrasonic, laser or combined assistance can also be configured for steel and suitable hard, brittle ceramics, subject to sample trials.
Q5: What optical surfaces can the SGDT350F machine?
The brochure lists flats, spheres and cylindrical surfaces. Complex geometries depend on the selected setup, axes, workholding, tooling and process configuration.
Q6: What is the machining capacity of the SGDT350F?
The published machining capacity is φ650 mm × 300 mm. Larger capacities may be evaluated, while usable capacity depends on workpiece size, workholding, tooling and motion clearance.
Q7: What are the published linear-axis specifications of the SGDT350F?
The X, Y and Z travels are 350 mm, 150 mm and 300 mm respectively. Published positioning repeatability is ≤ 0.5 μm for all three axes. Maximum travel speed is 4,000 mm/min on X and Z and 2,000 mm/min on Y. Published straightness values apply to the stated test lengths and should not be extrapolated beyond those conditions.
Q8: What are the published B- and C-axis specifications?
The B axis is specified with a hydrostatic bearing and torque-motor direct drive, while the published C-axis configuration is aerostatic with torque-motor direct drive. The B-axis maximum speed is 50 r/min and published angular travel is 0°–360°. The aerostatic C-axis configuration is listed up to 3,000 r/min.
Q9: What machining and support options can be configured on the SGDT350F?
Published machining 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.
Q10: What representative machining result is shown for the SGDT350F?
The brochure shows a φ75 mm / SR250 convex spherical surface in high-purity aluminum alloy with published form error PV ≤ 0.2 μm and roughness Ra ≤ 3.0 nm. These are representative case values and are not universal performance guarantees across all workpieces, materials or machine configurations.
Q11: Does a 5-axis configuration automatically mean simultaneous 5-axis machining?
The published technical documentation defines the SGDT350F as an X / Y / Z / B / C five-axis machine, but it does not state that every operation uses simultaneous five-axis interpolation. Spindle and C-axis architecture and interpolation depend on the selected configuration.
Q12: Does the 0.01 nm programming resolution represent machining accuracy?
No. The published linear programming resolution is ≤ 0.01 nm, but this value is the numerical increment of CNC commands. It is not feedback resolution, positioning accuracy or machining accuracy.
Q13: What installation and utility conditions are specified for the SGDT350F?
The published reference operating temperature is 20 °C ± 0.5 °C. The base power supply is three-phase, five-wire, 380 V, 50 Hz. Clean, dry air is required, with inlet requirements, dimensions and service space defined for the selected configuration. Air-spring vibration isolation is specified.
Send the target model SGDT350F, 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.
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