Ultra-precision Twin Turret Grinding System

Specifications

Major Functions / Key Features

The Cranfield Precision TTG achieves precision grinding of complex freeform surfaces thanks to the precise interpolation control of the two rotary turret axes. These axes work in combination with the linear axis and the rotary component workhead.
It is capable of optical grinding and diamond turning with very low sub-surface damage, micro-milling and pre-polishing, all on the same platform.
To further optimize stiffness, the rotary axes have large hydrostatic thrust bearings mounted directly on the machine base. This gives highly stiff, damped axes an excellent bearing ratio in all directions for ultimate precision and repeatability.
The Cranfield Precision TTG 350 has the capacity to produce components up to 350mm in diameter, engineered specifically for optics and molds, medical and aerospace components.

MACHINE CAPABILITY
< 300 nm/60 mm P-V form accuracy
< 1 nm Ra surface texture capability
< 1 arc sec turret accuracy

MACHINE PROCESS OPTIONS
Plunge mode: Plano, spheres (concave/convex)
Generate mode: concave/convex aspheres, spheres
Freeform mode: Surface generation
Edging: Circular boundary
Edging: Non symmetrical edge profiling
Chamfering: (circular boundary)
Coring
Flat milling
Scooping
Slicing and dicing
Prism cutting/grinding
Milling
Diamond turning
Hard turning
Pre-polishing