TLG-4000 Toric Lens Generator


Design Features

  • Fast tool servo designed specifically for cutting toric lens profiles
  • 4000 microns of total travel
  • Compact drive technology
  • Non-proprietary, open programming syntax
  • High-performance in a cost-effective package
  • Reaction mass design minimizes vibration-induced errors on lens turning platform
  • Small size and low moving mass enable higher machine throughput

The TLG (Toric Lens Generator) is a single-axis, high-speed oscillating tool optimized for the production of toric lens profiles. Competitive oscillating tools are designed to manufacture multi-faceted lens profiles in metallic materials. As such they are over-designed for turning toric profiles in materials commonly used in the manufacturing of IOLs and contact lenses. This “excess” capability results in a system that is overpriced, oversized, and unnecessarily complex to program.

The Aerotech TLG was developed with the primary purpose of creating toric lens profiles in IOL and contact lens materials rotating at speeds of up to 6000 rpm. By limiting the application scope of the product, Aerotech is able to develop a smaller, less costly solution than competitive products. The TLG is equipped with an advanced reaction-mass design that virtually eliminates vibrational errors that would otherwise be introduced into the lens manufacturing platform, thus resulting in a high-quality lens surface finish. Furthermore, a tool micro-height adjuster allows for ±500 µm of adjustable range using a very-high-resolution adjusting mechanism that greatly reduces or eliminates tool centering errors resulting in reduced polishing time.

Open Programming Language

The TLG and its supporting drive technology are designed to work with Aerotech’s A3200 Automation platform, a scalable networked system capable of supporting up to 32 axes. The A3200 system is programmed directly in industry standard G-code or with AeroBasic™ commands that provide access to capabilities beyond standard machine-tool syntax. Tool paths are created using the standard toric “Z” height algorithm which is completely accessible to the user. The algorithm can be customized to support an aspheric base profile or non-orthogonal major and minor toric axes.

Compact Design

The TLG uses Aerotech’s Ndrive-FCL drive technology. The linear power stage reduces following errors during the direction reversals of the tool resulting in submicron-level form errors. At 100 x 223 x 174 mm in size the Ndrive-FCL is significantly smaller than competitive drive products allowing it to be mounted inside the machine base, reducing the overall size of the machine.



Mechanical SpecificationsTLG-4000
Travel 4000 µm
Maximum Speed 600 mm/s
Maximum Acceleration 20 g
Servo 0 dB Crossover Frequency(1) >500 Hz
Maximum Pk-Valley Sinusoidal Motion Continuous(2) 75 µm @ 200 Hz (6000 rpm)
305 µm @ 100 Hz (3000 rpm)
1200 µm @ 50 Hz (1500 rpm)
Peak 90 µm @ 200 Hz (6000 rpm)
560 µm @ 100 Hz (3000 rpm)
3300 µm @ 50 Hz (1500 rpm)
Stage Mass 3.3 kg
Material Aluminum Body/Black Anodize Finish
Tool Height Adjustment ±500 µm
Tool Height Adjustment Resolution 25 µm/rev Differential Screw
  1. Certified with each stage. Requires Aerotech controller.
  2. Requires 10 psi cooling air to be supplied to the stage.
  • TLG Amplitude versus Frequency
  • Measurement of a 100 micron, 12 mm diameter tilted flat
  • LensPRO-200 and Surface Finish


  • TLG-4000

Ordering Information

TLG-4000 Toric Lens Generator

Cable Length (Required)

Option Description
-CBL1 300 mm cable length
-CBL2 800 mm cable length
-CBL3 1300 mm cable length

Mounting Plate (Optional)

Option Description
-MP Mounting plate

Integration (Required)

Aerotech offers both standard and custom integration services to help you get your system fully operational as quickly as possible. The following standard integration options are available for this system. Please consult Aerotech if you are unsure what level of integration is required, or if you desire custom integration support with your system.

Option Description
-TAS Integration - Test as system
Testing, integration, and documentation of a group of components as a complete system that will be used together (ex: drive, controller, and stage). This includes parameter file generation, system tuning, and documentation of the system configuration.
-TAC Integration - Test as components
Testing and integration of individual items as discrete components. This is typically used for spare parts, replacement parts, or items that will not be used or shipped together (ex: stage only). These components may or may not be part of a larger system.