Absolute glass scale for CNC machine tools / from 70 mm to 3'240 mm / ± 3 μm

GVS 608

• Absolute optical scale with glass grid, especially suitable for CNC machine tools.
• Serial interface SSI-BiSS C (unidirectional), with or without 1 Vpp analog signal, Siemens DRIVE-CLiQ and FANUC α-αi.
• Resolutions up to 10 nm.
• Degree of accuracy ± 5 μm in the standard version and ± 3 μm in the high-precision version (± 2 μm for measuring lengths up to 720 mm).
• Profibus-DP, Profinet, CANopen, DeviceNet and ModBus protocols via conversion gateways.
• Non-extensible sealing lips, along the sliding surface of the reading head, attached to the lateral ends.
• Innovative device inside the scale for the disposal of liquids coming from inefficient filtration systems.
• The special sealing lips and the device for the disposal of liquids provide excellent protection of the grille
  from refrigerant fluids that are often used during machining.
• A metrological certificate is supplied with each scale.
• Linear coefficient of thermal expansion λ = 8 x 10-6 °C-1.
• High accuracy and stability of signals even at high speeds, strong accelerations and vibrations.
• Adjustable connection cable output.
  Connector inside the transducer.
• Protected against power supply polarity reversal and short circuits at the outputs.
• Small size to allow installation in tight spaces.
• Interchangeable with the previous model AGS.
• Filter system for pressurization available on request.

Type	Resolution 1 Vpp	Resolution absolute measure	Grating pitch	Accuracy grade	Max. traversing speed	Measuring length	Serial interface	Protection class	Data sheet
GVS 608 T	up to 0.1 μm	1 µm - 0.1 µm	20 µm	± 5 μm ** standard version ± 3 μm ** high-accuracy version (± 2 μm for ML up to 720 mm)	120 m/min	from 70 up to 3,240 mm	SSI - BiSS C (unidirectional)	IP 54 standard IP 64 pressurized
GVS 608 D	up to 0.1 μm	1 µm - 0.1 µm	20 µm	± 5 μm ** standard version ± 3 μm ** high-accuracy version (± 2 μm for ML up to 720 mm)	120 m/min	from 70 up to 3,240 mm	Siemens DRIVE-CLiQ	IP 54 standard IP 64 pressurized
GVS 608 F	up to 0.1 μm	1 µm - 0.1 µm	20 µm	± 5 μm ** standard version ± 3 μm ** high-accuracy version (± 2 μm for ML up to 720 mm)	120 m/min	from 70 up to 3,240 mm	FANUC α-αi	IP 54 standard IP 64 pressurized

1. 10 nm Max. Resolution.
   ± 2 μm Max. Degree of accuracy.
   0.2 μm Max. Backlash error.
2. Serial interface SSI-BiSS, with or without 1 Vpp analog signal, Siemens DRIVE-CLiQ and FANUC α-αi.
3. Seal to protect the circuit (IP 67).
4. Connection inside the transducer.
5. PUR cable, suitable for continuous movements.
   Adjustable connection cable output.
6. Molded M12 connector (IP 67) or other models on request.
7. Horizontal or vertical pressurization.
8. Measuring length up to 3240 mm.
9. Robust and heavy aluminum profile.
   Dimensions 40×24 mm.
10. Optical glass grid for absolute reading (distance 20 μm).
11. Non-expandable sealing lips.
12. Block for the lateral attachment of the sealing lips.
13. Anticondensation device.

Accessories

Digital display devices:

• Vision 518
• Vision 700
• Vision 900

Positioning control:

• THESI 310
• THESI 320