Here is the preview url to copy
+

https://www.fivesgroup.com/jp/preview
Skip to main content Skip to page footer

Cranfield
Precision OGM

ultra-precision freeform optical grinding

The ultra-precision freeform grinding of large optics requires a machine that can offer ultimate stiffness, thermal stability and the flexibility to meet the needs of your application. The Cranfield Precision OGM delivers on all counts.

large optical component Grinding

If you’re looking for a machine capable of ultra-precision freeform grinding of large optics, you’ve come to the right place. The OGM is used to produce freeform mirrors used in extreme ultra-violet semiconductor lithography, as well as mirrors for space telescopes.

Check out our Cranfield Precision OGM flyer to learn more.

Download

 

Advanced software solutions

The Cranfield Precision OGM is equipped with our MöbiusCAM software. This software performs the computations required to generate associated machine commands and brings additional precision and flexibilty to the machine. Furthermore, this standalone software allows you to select from a number of surface definitions and operations, including:

  • Spheric, aspheric and freeform mode
  • Spiral and raster grinding path modes
  • Edging: circular boundary
  • Edging: non-symmetrical edge profiling
  • Chamfering
  • Light weighting
  • On-machine metrology

Innovative system to meet your specifications

The Cranfield Precision OGM also features our minimal hysteresis, and patented vertical axis counterbalance. This innovative system enables us to hold tight specifications, minimize form errors and sub-surface damage.

additional features

A number of design features enable us to meet the specific demands of these challenging industries, which include:

  • Hydrostatic bearings for very high stiffness and damping, enabling ultimate precision
  • Twin linear motors, eliminating backlash and ensuring complete control
  • FEA optimized base and bridge
  • 2,500 rev/min work spindle (5,000 RPM optional)
  • 60 rev/min 800 Nm rotary table
  • Direct drive work spindle and rotary table
  • In-situ measuring probe
  • Secondary spindle for I/D & O/D grinding and light-weighting
  • Wheel dressing station

specifications

  OGM 1200 OGM 1600 OGM 2500
MACHINING CAPACITY    

Max. diameter

1,200 mm

1,600 mm

2,500 mm

Max. workpiece height capacity

200 mm

600 mm

800 mm

Max. workpiece mass

1,200 kg

1,600 kg

2,000 kg

Y AXIS (HORIZONTAL WORKPIECE TRAVEL)    

Axis stroke

1,430 mm

2,000 mm

2,200 mm

Min. command resolution

0.05 μm

0.05 μm

0.05 μm

Max. linear motor force (continuous)

1,640 N

1,640 N

1,640 N

Max. working feed rate velocity

3,000 mm/min

3,000 mm/min

3,000 mm/min

Z AXIS (VERTICAL GRINDING WHEEL INFEED)    

Axis stroke

275 mm

455 mm

655 mm

Min. command resolution

0.05 μm

0.05 μm

0.05 μm

Max. working feed rate velocity

3,000 mm/min

3,000 mm/min

3,000 mm/min

C AXIS (COMPONENT WORK TABLE)    

Axis rotation (continuous)

+/- 360°

+/- 360°

+/- 360°

Max. axis velocity

60 rpm

60 rpm

60 rpm

Encoder resolution

0.0001°

0.0001°

0.0001°

S1 GRINDING SPINDLE    

Spindle speed (standard spindle)

100 - 3,055 rpm

100 - 3,055 rpm

100 - 3,055 rpm

Theoretical stiffness (radius and axial)

950 N/μm

950 N/μm

950 N/μm

Rated spindle power (continuous)

20 kW

20 kW

20 kW

Dimensions    

Dimensions (W x D x H)

2,180 x 6,000 x 3,050 mm

2,600 x 7,550 x 3,850 mm

3,600 x 8,750 x 4,100 mm

Machine weight

30,000 kg

40,000 kg

55,000 kg

  OGM 1200 OGM 1600 OGM 2500
MACHINING CAPACITY    

Max. diameter

47"

63"

98.4"

Max. workpiece height capacity

7.9"

23.6"

31.5"

Max. workpiece mass

2,646 lb

3,527 lb

4,409 lb

Y AXIS (HORIZONTAL WORKPIECE TRAVEL)    

Axis stroke

56.3"

78.7"

86.6"

Min. command resolution

0.05 μm

0.05 μm

0.05 μm

Max. linear motor force (continuous)

1,640 N

1,640 N

1,640 N

Max. working feed rate velocity

118 in/min

118 in/min

118 in/min

Z AXIS (VERTICAL GRINDING WHEEL INFEED)    

Axis stroke

10.8"

18"

25.8"

Min. command resolution

0.05 μm

0.05 μm

0.05 μm

Max. working feed rate velocity

118 mm/min

118 mm/min

118 mm/min

C AXIS (COMPONENT WORK TABLE)    

Axis rotation (continuous)

+/- 360°

+/- 360°

+/- 360°

Max. axis velocity

60 rpm

60 rpm

60 rpm

Encoder resolution

0.0001°

0.0001°

0.0001°

S1 GRINDING SPINDLE    

Spindle speed (standard spindle)

100 - 3,055 rpm

100 - 3,055 rpm

100 - 3,055 rpm

Theoretical stiffness (radius and axial)

950 N/μm

950 N/μm

950 N/μm

Rated spindle power (continuous)

20 kW

20 kW

20 kW

Dimensions    

Dimensions (W x D x H)

7’ x 20’ x 10’

8.5’ x 24.8’ x 12.6’

11.8’ x 28.7’ x 13.5’

Machine weight

66,138.7 lb

88,185 lb

121,254 lb