LT ULTRA · 2 ADOPTIC-80 2005 English LT ULTRA ... linear) should be possible to generate intermediate ... Retarder 210310 208.30.1 PR 1,00. 13 ADOPTIC-80

1 ADOPTIC-80 2005 English

LT ULTRA

INSTRUCTION MANUAL

BENDING MODULE ADAPTIVE (90°)

ADOPTIC-80

Please read carefully before using the unit.

© LT Ultra-Precision Technology GmbH, 2004.

ENGLISH-VERSION

LT Ultra-Precision Technology GmbH Tel.: +49-(0)7552-40599-0 Wiesenstrasse 9, Aftholderberg FAX: +49-(0)7552-40599-50 D-88634 Herdwangen-Schönach E-Mail: [email protected] Germany Internet: http://www.lt-ultra.com


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CONTENTS 1 INTRODUCTION 2 PRELIMINARY PRECAUTIONS 3 TECHNICAL DATA 4 INSTALLING AND USING ADOPTIC-80

4.1 Connecting the Cooling-Water and Gas-Flushing Lines 4.2 Safety Precautions 4.3 Aligning the Mirror 4.4 Replacing the Mirrors

5 REPLACEMENT-PARTS LIST 6 DIMENSIONAL DRAWING 7 DOCUMENTATION 8 DISPOSAL OF DISCARDED COMPONENTS 9 PRESSURE SERVO VALVE AND PRESSURE SENSOR

1 INTRODUCTION Adaptive module ADOPTIC-80 is used for integration of our elliptical adaptive optic. Without any combination with a flat mirror a 90° bending is realized.

The favourite use of this optical component is for beam path compensation and beam size variation or as a final optical component for focal shift in or before a cutting / welding head. For optimal cooling, the adaptive mirror surface is direct water cooled and separated from the actuating medium. 1.1 General The ADOPTIC adaptive mirror is actuated pneumatically by a high precision servo valve, being controlled by an analogue voltage (0 – 10 V) or current (4 – 20 mA) interface. In common, the current interface should be favoured due to its significantly lower sensitivity against Electro-magnetic emission. The accuracy of the servo valve (linearity and hysteresis) on delivery is at about 1% of the nominal stroke. But please keep in mind that only the stroke is proportional to the control signal; in general, the variation of both „shift of position of the desired diameter“ and focus shift will follow more complicated rules. Expect non-linear functions, depending on the used laser’s properties and the system configuration.


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1.2 System integration The determination of the above mentioned functions or look-up tables of the desired shift vs. control signal is a customer‘s task. In general, it must be performed once per laser/machine combination. If desired, we can support you. These functions or look-up tables can be utilised either by your CNC/PLC or, if desired, by a control unit delivered from LT to generate the appropriate control signals. If using look-up tables, an interpolation (linear or, even better, non-linear) should be possible to generate intermediate values. Please discuss this objective with us in advance. If ever possible, you should use your machine’s CNC/PLC to generate the control signals. Preconditions are: - 1 analogue output, 0 - 10 V (optionally 4 - 20 mA) - Resolution min. 8 bit - Time delay < 50 msec, for focus shift if possible < 10 msec - Ability to handle look-up tables (with interpolation) or non-linear functions - Input value: overall position of the focusing head (sum of all axis positions) Additionally, the cooling water flow rate and the cooling water temperature on exit must be checked. Therefore, two analogue or digital inputs for each ADOPTIC system are required. Using digital inputs, you can only detect instantaneous failures and react on them with Emergency Off or Interlock, according to your safety philosophy. The use of analogue inputs allows for the detection of slow degradation and, setting appropriate warning thresholds, for planning of the necessary repairs. If the control unit is to be delivered by LT, please contact us in advance to discuss your requirements and your interface protocol/specification. In any case, we need the following issues: - Output of a signal representing the present overall position of the focusing head (sum of all axis

positions), as an analogue signal (4 - 20 mA / 0 –10 V, 1024 increments) or digital signal (BCD, HEX, BIN; resolution 1024 increments)

- Analysis of warning and Emergency Stop signals generated in the LT control unit - Definition of the whole safety philosophy and technology by the customer prior to quoting - Integration of the LT control unit into the system by the customer - Full liability of the customer versus the end user


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1.3 Assembly and alignment Principally, the input beam must both strike and leave the mirror surface under AOI 45°. If this is not granted by the machine’s mechanical design under very narrow tolerances, the beam bender incorporating the ADOPTIC mirror mandatory must be adjustable in two linear axes. LT’s standard alignment tool is a cross-hair target. This target has identical dimensions as the respective mirror and replaces the mirror during alignment. (See figure) In any case we strictly recommend contacting us for alignment questions right in advance.


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1.4 Summary For the operation of ADOPTIC systems, the following conditions are mandatory: - Pressurised air, dry, fine-filtered (< 5 µm), input pressure ≥ 6 bar - Electric connection 220VAC, 50 Hz or 24V DC, power consumption max. 5 W - Determination of the actual overall position for internal or external ADOPTIC stroke signal

generation For the integration of ADOPTIC systems into the machine control: - Analogue output 4 - 20 mA . resp., 0 - 10 V min. 8 bit - Two analogue / digital inputs for coolant flow rate and temperature check - With analogue check: programmable warning for the determination of slow degradation General: - The ADOPTIC must be mounted in a way that centric beam input is granted. - All apertures must be sufficiently dimensioned (≥ 1, 5 x beam diameter, better 2 x beam

diameter) - Please discuss all questions and technical details sufficiently in advance with LT.


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2. PRELIMINARY PRECAUTIONS Read all of the detailed instructions appearing in Section 4 of this manual before proceeding to use the unit in order to preclude malfunctioning of the unit or damage to the unit or its components. Basic adjustments that have been factory preset have been locked in position with a dab of lacquer and should not be altered by users. The safety precautions covered in Section 4.2 of this manual should be observed at all times when using the unit.


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3 TECHNICAL DATA 3.1 Adaptive Mirror ADOPTIC-60

Clear aperture mirror 80mm ( @ 90° )

Useful aperture Max. 45mm ( @ 90° , depending on stroke )

Weight ( incl. plate and connectors) 2,0 Kg

Water cooling Copper

Cooling water temperature 15 - 25°C ( +/- 0.5°C )

Pressure Cooling Water 4-6 bar

Frequency Max. 10 Hz

Dimensions W x L x H 126x115x35

Laser power (rated) 6 KW ( CW )

Resulting Variation of Focal length, max. (Flat surface @ 3 bar)

+ 8m/0m/-8m

3.2 Pneumatic Precision Servo Valve

Medium Pressurised air or Nitrogen (Cutting grade)

Input pressure 6 bar

Operating pressure (nominal) 6 bar

Pressure output 0,05 bar – 5,95 bar

Linearity < 1% of max. operating pressure

Temperature range (operation) 0°C - 50°C

Medium requirements non-condensing (< 5,5 g/m3), oil-free (<0,1 mg/m3), filtered (<5µm)

Weight 0,3 kg

Supply voltage 24 V ± 15%

Signal Input 0 - 10 V for 0 - 6 bar, (4 - 20 mA optional)

Sensor output 0 - 10 V for 0 - 6 bar

Power consumption 5 W

3.3 SPECS

Parameter

Value

1 Clear apertures: Housing, Bender BU-60 Adaptive Mirror

80 mm 45 mm

2 Max. cooling-circuit pressure G 1/8"-fittings

5 bar DN 8 mm

3 G 1/8” – fittings actuating gas DN 6 mm

4 Mirror specifications Radii-of-curvature tolerances Surface figures ( complete system )

± 3 %

λ/20 at 10.6 ym

5 Cooling-water flow rate 4 litres / min at 4 bar

6 Weight (bender including mirror)

kg


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4.1 CONNECTION WATER / GAS

Water circuit is connected to the optics by quick-change connectors outside of the housing. (Tubes optional) Both mirrors can be pipes serial.

Connector’s adaptive optic ADOPTIC-60

Pressure transmitter

Connector cooling water

Connector actuating gas

Connector cooling water


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4.2 Safety Precautions

Make certain that the laser has been switched off and that it cannot be restarted by others at any time before alignment procedures have been concluded and any laser beam opening is covered by the replaced mirror or any other cover.

All alignment procedures should be performed using a low-power alignment laser only, and performed by specially trained qualified, personnel only.

The housing may be optionally supplied with an interlock on its cover.

CAUTION! PERSONAL-INJURY HAZARDS DUE TO LASER RADIATION!


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4.3 Aligning the Optics

Two adjusting screws are included on the side at which the optics is secured. The optics can be aligned in two axes by turning these screws.

Do not open or move any screws which are secured with locking compound.


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4.4 Replacement of the Optics

• Make sure that the laser source is switched off and secured against inadvertent activation.

1. Make sure that the cooling system has been depressurized, and that the self-sealing quick couplings

for the feed and return lines have been disconnected.

2. Always insert the mirror units into the housing plane-parallel to the mating surface of the leveling

platform, and aligned to the three mounting holes, without exerting force.

3. Make sure that the three mating surfaces around the M6 mounting threads on the housing and

the mirror units are clean. Clean with a soft, lint-free cloth if necessary.

4. Mount the mirror units to the housing with the three screws (max. tightening torque: 3 Nm), and

reconnect the cooling circuit.

5. Observe correct connection direction (see description in section 4.1).


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5. REPLACEMENT-PARTS LIST

KG

Article Code Code OLD Net

1 ADAPTIVE MIRROR UNIT ADOPTIC-80

uncoated, direct water-cooled

clear aperture 80mm ( useful clear aperture max. 45mm )

Flat surface @ 3 bar, Focal length +/- 8m

2,00

1-1 Refurbishing Pos. 1, uncoated, new membrane 2,00

2 ADAPTIVE MIRROR UNIT ADOPTIC-80

coated Super enhanced, direct water-cooled

clear aperture 80mm ( useful clear aperture max. 32mm )

Flat surface @ 3 bar, Focal length +/- 8m

210288 2,00

2-2 Refurbishing Pos. 2, coated Super enhanced, new membrane 210247-R 2,00

3 Pneumatic precision valve 0 - 6 bar, 0 - 10 V 700061 DS15R-6-V 0,40

4 Pneumatic precision valve 0 - 6 bar, 4-20mA 700065 DS15R-6-A 0,405 Pressure transmitter 0 - 6 bar, 0-10V 700062 401001-6-V 0,106 Pressure transmitter 0 - 6 bar, 4-20mA 700064 401001-6-A 0,10

7 BEAM BENDER STANDARD BUS-80, ( clear aperture 80mm ) 230244 218.0.1 1,30

8 Safety Switch ( SCHMERSAL ) 230341 218.509 Cross-Hair Insert 230237 208.33.2 1,00

9-1 Extra Cards for Cross-Hair Insert ( set of 50 cards ) 700095 0,10

10 FLAT-MIRROR UNIT, clear Ap. 80mm, uncoated 210215 208.30.1 1,0011 FLAT-MIRROR UNIT, clear Ap. 80mm, coated Molybdenum 210308 208.30.1 MO 1,0012 FLAT-MIRROR UNIT, clear Ap. 80mm, coated SEC 210309 208.30.1 SEC 1,00

13 FLAT-MIRROR UNIT, clear Ap. 80mm, Phase Retarder 210310 208.30.1 PR 1,00


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6 DIMENSIONAL DRAWING


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7 DOCUMENTATION

The entire water-cooling system has been pressure-checked at 6 bar prior to shipment with both mirrors installed.

The results of interferometric testing of the surface figures of both mirrors will be found in the accompanying test reports.

8 DISPOSAL OF DISCARDED COMPONENTS

Any components, such as mirrors, that are no longer needed may be returned to us for proper disposal, provided that they are returned to us with all shipping charges prepaid.

9 PRESSURE SERVO VALVE AND PRESSURE SENSOR

(see the following pages)

Documents

LT ULTRA · 2 ADOPTIC-80 2005 English LT ULTRA ... linear) should be possible to generate intermediate ... Retarder 210310 208.30.1 PR 1,00. 13 ADOPTIC-80