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OPERATION MODES

PAGE

Operation modes

Pulse Width Modulation (PWM)

Pulse Width Modulation, or PWM, controls laser power by varying the duty cycle of p250’s RF amplifiers,

which in turn control the time-averaged RF power applied to the laser. The percentage of optical output

increases as duty cycle increases (at a constant PWM frequency) or as PWM frequency decreases (at a

constant duty cycle).
p250 lasers are designed to operate at Command signal base frequencies up to 100 kHz; however, the

choice of PWM frequency depends on the user’s specific application. When considering Command

frequencies at 5 kHz or below, please review Marking/engraving operation later in this section. For high-

speed motion applications that cannot tolerate any ripple in the optical beam response but still require

adjustable power levels, we recommend the use of higher PWM frequencies, up to 100 kHz maximum.

Command signal

The modulated Command signal applied between Pin 9, PWM Input, and Pin 1, PWM Return, of the User

I/O connector on the p250 laser has three parameters: signal amplitude, base frequency, and PWM duty

cycle. By changing these parameters, you can command the beam to perform a variety of marking,

cutting, welding, or drilling operations.

The first Command signal parameter, signal amplitude, is either logic low—corresponding to laser beam

off, or logic high—corresponding to beam on. The laser off voltage, typically 0 V, can range from 0.0 V

to +0.8 VDC while the laser on voltage, typically 5 V, can range from +3.5 V to +6.7 VDC. Please refer to

the following figures.
Pulse frequency, the second parameter, is the repetition rate of the PWM input signal. The p250’s pulse

frequency can range from a single-shot up to a maximum frequency of 100 kHz. The following figures

illustrate representative output energy profiles of the p250 laser at various PWM duty cycles and pulse

repetition frequencies (PRF).
The third Command signal parameter, PWM duty cycle, is the percentage of the period that the

Command signal is high. For example, if the Command signal’s amplitude (at 5 kHz) is high for 100

and low for 100

s, it has a 50% duty cycle; if the amplitude is high for 190

s and low for 10

s, it has a

95% duty cycle. The following figure illustrates typical PWM Command signal parameters.

Warning: Serious Personal Injury

Always us shielded cable when connecting to your PWM Command signal source to PWM

Input/PWM Return inputs.
In electrically noisy environments, long lengths of unshielded wire act like an antenna and may

generate enough voltage to trigger un-commanded lasing.

Содержание p250

Страница 1: ...ENGINEERED BY SYNRAD p250 Laser User Manual...

Страница 2: ...g and Cooling 11 Contents Description 12 Contents Description continued 13 Nomenclature 14 Nomenclature Continued 15 Laser Safety Introduction 16 Hazard Information 16 Terms 16 General hazards 18 Disp...

Страница 3: ...er I O connection summary 55 Input output signals 57 Sample I O circuits 65 DC power cables 69 p250 web interface 70 Set your computer s static IP address 70 Event log page layout 73 Changing the p250...

Страница 4: ...zard label locations 21 Table 2 1 Class 4 safety features 25 Table 2 2 European Union Directives 26 Figure 2 3 p250 Declaration Document 27 Figure 3 1 OEM p250 front panel controls and indicators 29 F...

Страница 5: ...presentative output energy profile 40 duty cycle 5 kHz 50 0 s Dev time base 50 Figure 4 18 Representative output energy profile 40 duty cycle 50 kHz 5 0 s Dev time base 51 Figure 4 19 Representative o...

Страница 6: ...a Connection Properties dialog 77 Figure 4 41 Internet Protocol TCP IP Properties dialog 78 Figure 4 42 Configure IP Address link on p250 home page 79 Figure 4 43 p250 Change IP Address page 79 Figure...

Страница 7: ...the control measures and safety guidelines provided by the laser s manufacturer and those established by your Laser Safety Officer LSO Radiation Safety Officer RSO or safety department of your busine...

Страница 8: ...49 9431 7984 0 Email photonics novanta com Milan Italy Phone 39 039 793 710 Email photonics novanta com China Novanta Sales Service Office Shenzhen China Phone 86 755 8280 5395 Email photonics china...

Страница 9: ...on unless otherwise instructed If your p250 laser fails within the first 45 days after shipment NOVANTA will pay all ship ping charges to and from NOVANTA when shipped as specified by NOVANTA Customer...

Страница 10: ...erve as the liaison between you and our Applications Lab in processing material samples per your specifications To speak to the Regional Sales Manager in your area call NOVANTA at 1 800 NOVANTA1 Custo...

Страница 11: ...755 8672 1125 E mail sales china Novanta com web www Novanta com Guidelines Content Refer to the drawings located in the technical reference chapter when installing and operating your p250 laser Also...

Страница 12: ...ings with fittings that accept 1 2 coolant tubing See the Connecting section for important installation details Cooling Tubing p250 carries cooling water from the chiller not included to the laser and...

Страница 13: ...CONTENTS DESCRIPTION CONTINUED PAGE 13 Contents Description continued Figure 1 1 p250 ship kit contents...

Страница 14: ...ct functional categories Keyswitch and OEM models In addition to a manual Keyswitch for resetting faults all Keyswitch equipped lasers incorporate a manual shutter switch to block the laser s output a...

Страница 15: ...NOMENCLATURE CONTINUED PAGE 15 Nomenclature Continued Figure 1 2 Anatomy of a model number...

Страница 16: ...re use and handling of Class 4 laser equipment Terms Certain terms are used throughout this manual or on the equipment labels Please familiarize yourself with their definitions and significance Warnin...

Страница 17: ...document Z136 1 2014 Safe Use of Lasers For laser systems being used or sold outside the U S A customers should refer to and follow the laser safety precautions described in European Normative and Int...

Страница 18: ...laser beam Eye wear protects against scattered energy but is not intended to protect against direct viewing of the beam never look directly into the laser output aperture or view scattered laser refl...

Страница 19: ...rtant quantity of source material per 10 CFR 40 13 c 7 Shaping grinding polishing or alteration of the optical component is prohibited Use of this optical component in contact lenses spectacles or in...

Страница 20: ...tps www Novanta com resources general_information lasersafetyresources contain an online laser safety handbook that provides information on 1 Laser Safety Standards for OEM s System Integrators 2 Lase...

Страница 21: ...ADDITIONAL LASER SAFETY INFORMATION PAGE 21 P250 label locations Figure 2 1 P250 hazard label locations...

Страница 22: ...ity for the compliance of the system into which OEM laser products are integrated Center for Devices and Radiological Health CDRH requirements Product features incorporated into the design of p250 las...

Страница 23: ...Information to the user Important Note The following FCC information to the user is provided to comply with the requirements of 47 CFR Part 18 Section 213 Interference Potential In our testing NOVANT...

Страница 24: ...this Standard since the final product will itself be subject to the Standard This means that Buyers of OEM laser components are solely responsible for the assurance that the laser processing system so...

Страница 25: ...se LED illuminates when the duty cycle of the command cycle is long enough to produce laser output No No Yes Five second delay Circuit Element Disables RF driver laser output for five seconds after Ke...

Страница 26: ...1 2010 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use Part 1 General Requirements EN 61000 6 4 Radiated Emissions Group 1 Class A EN 61000 6 4 Conducted Emiss...

Страница 27: ...EUROPEAN UNION EU REQUIREMENTS ROHS COMPLIANCE PAGE 27 Figure 2 3 p250 Declaration Document...

Страница 28: ...ere corneal injuries always wear eye protection when in the same area as an exposed laser beam Do not allow the laser beam to contact a person This product emits an invisible laser beam that is capabl...

Страница 29: ...abel before applying power to the laser 2 Laser Aperture provides an opening in the p250 s front panel from which the beam exits 3 Optical Accessories Mounting provides four threaded holes 8 32 UNC fo...

Страница 30: ...n TMP Temperature LED illuminates green to indicate laser temperature is within limits and lasing may be enabled the LED is red and lasing is disabled if laser temperature rises above safe operating l...

Страница 31: ...severe corneal injuries and seriously burn human tissue the OEM or System Integrator must ensure that appropriate safeguards are in place to prevent unintended lasing Caution Possible Equipment Damag...

Страница 32: ...grade describes how to perform an upgrade to the p250 s operating firmware Integrating p250 safety features describes how to integrate p250 safety features into your automated control system p250 gene...

Страница 33: ...sel that maintains the lasing environment the aluminum tube is also the structural platform that integrates the laser s optical electrical and cooling components Figure 4 1 Hybrid waveguide unstable r...

Страница 34: ...mperature for maximum stability Beam conditioning The p250 laser incorporates a novel beam conditioning system that first converts the beam to a circular profile cleans up the beam to remove side lobe...

Страница 35: ...into one housing Beam conditioning The p250 laser incorporates a novel beam conditioning system that first converts the beam to a circular profile cleans up the beam to remove side lobes and improve...

Страница 36: ...a Beam Quality Enhancer or BQE For example the Haas Laser Technology Part Number BQE 25 10 6 SYN incorporates both polarization and isolation into one housing that can easily be mounted onto the face...

Страница 37: ...ntaminants that will damage optical surfaces If compressed shop air is the only choice available it must be filtered to the specifications shown in the following table Table 4 1 Assist gas purity spec...

Страница 38: ...temperature of the surrounding air or when the system is shut down but coolant continues to flow through the laser for extended periods of time Cooling guidelines NOVANTA recommends that the laser s c...

Страница 39: ...inside the laser Cooling guidelines Refer to the following dew point temperature table for a range of air temperature and relative humidity values Remember that the laser s coolant temperature must b...

Страница 40: ...RF POWER SUPPLY PAGE 40 Table 4 3 Dew point temperatures Continued...

Страница 41: ...se the laser to respond predictably and almost instantaneously to PWM Command signals even when there is considerable delay laser off time between applied Command signals All p250 lasers incorporate a...

Страница 42: ...of marking cutting welding or drilling operations The first Command signal parameter signal amplitude is either logic low corresponding to laser beam off or logic high corresponding to beam on The la...

Страница 43: ...ll 48 VDC connections from incidental contact in accordance with local state and national code requirements for electrical insulation and labeling All AC input wiring and fusing to the DC power supply...

Страница 44: ...effect as shown in the figure below Figure 4 5 Typical power curve Important Note Because the p250 is a pulsed laser it will not operate when a constant 5V 100 duty cycle PWM signal is applied If thi...

Страница 45: ...OPERATION MODES PAGE 45 Figure 4 6 Representative output energy profile 5 duty cycle 100Hz time base 200 s Div Figure 4 7 Representative output energy profile 5 duty cycle 1kHz time base 50 s Div...

Страница 46: ...ative output energy profile 5 duty cycle 10kHz 50 s Div time base Figure below Shows details of the output energy waveform at approximately 85 of peak power Figure 4 9 Representative output energy pro...

Страница 47: ...OPERATION MODES PAGE 47 Figure 4 10 Representative output energy profile 10 duty cycle 10 kHz 20 0 s Dev time base Figure 4 11 Representative output energy profile 10 duty cycle 50 kHz 5 0 s time base...

Страница 48: ...pulsed output behavior with a 20 duty cycle at a frequency of 1kHz Figure 4 12 Representative output energy profile 20 duty cycle 1 kHz 100 s Dev time base Figure 4 13 Representative output energy pro...

Страница 49: ...OPERATION MODES PAGE 49 Figure 4 14 Representative output energy profile 20 duty cycle 50 kHz 5 0 s Dev time base Figure 4 15 Representative output energy profile 20 duty cycle 100 kHz 5 0 s time base...

Страница 50: ...PERATION MODES PAGE 50 Figure 4 16 Representative output energy profile 40 duty cycle 1 kHz 200 s Dev time base Figure 4 17 Representative output energy profile 40 duty cycle 5 kHz 50 0 s Dev time bas...

Страница 51: ...ERATION MODES PAGE 51 Figure 4 18 Representative output energy profile 40 duty cycle 50 kHz 5 0 s Dev time base Figure 4 19 Representative output energy profile 40 duty cycle 100 kHz 5 0 s Dev time ba...

Страница 52: ...ERATION MODES PAGE 52 Figure 4 20 Representative output energy profile 50 duty cycle 100 kHz 5 0 s Dev time base Figure 4 21 Representative output energy profile 45 duty cycle 10 kHz 5 0 s Dev time ba...

Страница 53: ...icipate when the next PWM Command pulse will arrive the tickle pulse which typically lasts for 2 6 s depending on the laser can effectively merge with a PWM signal that follows closely afterwards When...

Страница 54: ...figure below for the 15 pin female D type sub miniature connector on the p250 s rear panel The figure below illustrates the pin arrangement of the User I O connector Figure 4 22 User I O connector pi...

Страница 55: ...I O CONNECTION SUMMARY PAGE 55 User I O connection summary The following user I O pin descriptions table provides a quick reference summary to p250 User I O connections Table 4 4 User I O pin descript...

Страница 56: ...AGE 56 Important Note When connecting field wiring to the Remote Reset Start Request input use twisted pair and or shielded cabling Refer to NOVANTA Technical Bulletin 021 for details Table 4 4 User I...

Страница 57: ...I O connector provides auxiliary DC power for driving external inputs or outputs connected to the User I O port Pin 4 5 VDC Auxiliary Power and Pin 5 24 VDC Auxiliary Power are protected by self rese...

Страница 58: ...itive or negative polarity signal inputs These three signals also share a common return connection Input Common which is separate from chassis ground to completely isolate control signals for optimal...

Страница 59: ...n to provide maximum operator safety When the Remote Interlock input is opened voltage source removed the internal shutter automatically closes to block the beam path the RDY LED turns Off the SHT LED...

Страница 60: ...Quick Start Plug bypasses the laser s safety interlock function potentially exposing personnel in the area to invisible infrared laser radiation The Quick Start Plug is intended only for initial test...

Страница 61: ...it specifications Table 4 4 User I O pin descriptions Continued Note Shutter Open Request and Remote Interlock inputs are dependent control functions The internal shutter mechanism will not activate o...

Страница 62: ...und to allow high side or low side switching and to isolate control signals for optimum EMI performance p250 s optically isolated outputs are useful for sending laser status to a Programmable Logic Co...

Страница 63: ...INPUT OUTPUT SIGNALS PAGE 63 Table 4 4 User I O pin descriptions Continued...

Страница 64: ...The figure below illustrates the output circuit s equivalent internal schematic and the able that follows provides p250 output circuit specifications Figure 4 26 Output equivalent schematic Table 4 6...

Страница 65: ...e circuit Note that Pin 4 5 VDC Auxiliary Power could have been used instead depending on circuit voltage requirements Figure 4 27 Customer supplied interlock The following figure shows another variat...

Страница 66: ...le when only one p250 input is used Figure 4 29 PLC driven interlock signal When multiple PLC outputs are used connect p250 inputs to the PLC as shown in the figure below By supplying voltage VDC to P...

Страница 67: ...Auxiliary Power output Remember to size current limiting resistor R1 so that the current draw does not exceed 50 mA Figure 4 31 p250 output driving warning lamp Figure below illustrates a method for...

Страница 68: ...250 s outputs can drive the DC Input Module of a Programmable Logic Controller PLC By supplying voltage VDC to Pin 13 Output Common each p250 output is independently switched to activate individual PL...

Страница 69: ...ower supply ends are sized to fit M6 0 25 bolts When using a power supply other than the PS 401 we recommend using remote sensing so the power supply output remains at a constant voltage over varying...

Страница 70: ...sing a peer to peer Ethernet connection perform the steps in the following sections Important Note The following procedure may require the assistance of your IT Department if your facility s Ethernet...

Страница 71: ...in the following figure Important Note The Ethernet cable included in the laser s ship kit is a shielded crossover cable If your network application requires a straight through patch cable or you supp...

Страница 72: ...of the RF module Current A Displays DC current Amperage being drawn by each RF module Temperature C Displays the heat sink temperature of each RF module Relative Humidity Displays the measured relati...

Страница 73: ...igure above open your web browser type http 192 168 50 50 service html without the quotes and then press Enter The event log page opens and displays information recorded over the life of the laser Thi...

Страница 74: ...Change IP Address page opens 5 Remove DC power from the laser wait 30 seconds and then re apply 48 VDC power 6 Launch your web browser type the new IP address http xxx xxx xxx xxx and then press Enter...

Страница 75: ...ll is enabled notify your IT Administrator and disable the fire wall before continuing with this procedure Important Note You must carefully record and store the new IP address for future reference Af...

Страница 76: ...FIRMWARE UPGRADE PROCEDURE PAGE 76 Figure 4 37 Windows Control Panel Figure 4 38 Programs and Features dialog 3 In the Windows Features dialog Figure below check TFTP Client and then click OK...

Страница 77: ...es 2 In the Windows Control Panel double click Network and Sharing Center 3 In the Network and Sharing Center dialog click the Local Area Connection option 4 In the Local Area Connection Status dialog...

Страница 78: ...ser 2 Locate the Ethernet crossover cable in the ship kit and connect it between your computer and the p250 s Ethernet port 3 Remove the Quick Start Plug from the p250 s User I O connector 4 Apply 48...

Страница 79: ...it button This resets the laser s IP address to 192 168 50 50 Figure 4 43 p250 Change IP Address page Perform the firmware upgrade 1 In the firmware upgrade folder double click the Update bat file 2 W...

Страница 80: ...re Figure 4 44 p250 web browser display 7 If necessary click the Configure IP Address link at the bottom of the p250 web page and reset the default IP address to the specific address required for your...

Страница 81: ...e in the range of 5 24 VDC to Pin 2 the Remote Reset Start Request input Removing voltage allows power to reach the RF driver and begins a five second countdown after which lasing is enabled RDY LED i...

Страница 82: ...d when the Remote Interlock signal is removed INT LED red RDY LED off DC power is applied to the RF driver only when the INT LED is green and the RDY LED is yellow Remote interlock functionality is pr...

Страница 83: ...P250 GENERAL SPECIFICATIONS PAGE 83 p250 General Specifications Table 4 5 p250 general specifications...

Страница 84: ...P250 GENERAL SPECIFICATIONS PAGE 84 Table 4 5 p250 general specifications Continued...

Страница 85: ...P250 OUTLINE MOUNTING DRAWINGS PAGE 85 p250 Outline Mounting Drawings Figure 4 45 p250 outline mounting dimensions...

Страница 86: ...P250 OUTLINE MOUNTING DRAWINGS PAGE 86 Figure 4 46 p250 outline mounting dimensions mounting feet removed...

Страница 87: ...P250 OUTLINE MOUNTING DRAWINGS PAGE 87 Figure 4 47 p250 packaging instructions...

Страница 88: ...ncludes the following information Disabling the p250 laser Daily inspections Storage shipping Cleaning optical components Disabling the p250 laser Before performing any maintenance on your p250 laser...

Страница 89: ...chapter for p250 label types and locations Storage shipping When preparing the laser for storage or shipping remember to drain cooling water from the laser In cold climates any water left in the cooli...

Страница 90: ...sing any cleaning agents read Safety Data Sheets SDS and observe all necessary safety precautions Caution Possible Equipment Damage Even small amounts of contamination on optics in the beam path can a...

Страница 91: ...minor baked on vapors and debris 5 Gently and without applying pressure drag the damp lens wipe across the optical sur face in a single pass Do not rub or apply any pressure especially when using a co...

Страница 92: ...or the laser tube are outside the scope of this guide because they are not user serviceable assemblies do not attempt to repair them Contact NOVANTA or a NOVANTA Authorized Distributor for repair inf...

Страница 93: ...OPERATIONAL FLOWCHART PAGE 93 Operational flowchart Figure 5 1 p250 operational flowchart...

Страница 94: ...STATUS LED S PAGE 94 Status LED s Table 5 2 p250 Input Output LED Status Signals...

Страница 95: ...voltage in the range of 24 5 VDC is applied to Pin 15 For remote Interlocks with respect to Pin 11 and Input Common on the User I O Connector please refer to User I O connections in the Technical Ref...

Страница 96: ...ent of certain faults the RDY LED will blink an error code pause four seconds and then repeat the error code This sequence continues until the fault is corrected and the laser is reset by cycling DC p...

Страница 97: ...hese conditions To reset an under voltage fault first correct the voltage problem and ensure that 48 VDC is measured at the laser s DC power terminals Next cycle DC power off and then on again When th...

Страница 98: ...to rise and reach 95 lasing is halted and a fault is displayed in red within the error message section of the web page Blinking Shutter LED fault Possible Causes A No Strike fault has occurred possibl...

Страница 99: ...full continuous wave operation 2 the applied duty cycle is above the 50 limitation or 3 the applied pulse length exceeds 1000 s in duration When condition 1 occurs the laser begins lasing immediately...

Страница 100: ...commend the use of breathing quality air available in cylinders from a welding supply company Because compressed shop air contains minute particles of oil and other contaminants that will damage optic...

Страница 101: ...ound pin description 58 C Caution condensation 29 7 32 37 45 56 CDRH 23 Chiller temperature setpoint 40 Class IV safety features 26 Code of Federal Regulations CFR 23 24 Collimator 38 Command signal 4...

Страница 102: ...nual Version 1 9 L Label locations 22 Laser Active 57 pin description 64 Laser aperture 30 Laser Institute of America LIA 21 Laser Ready 64 pin description 57 64 M Maintenance daily inspections 91 dis...

Страница 103: ...s 74 RoHS 25 S Sales and Applications 10 Shorting plug see Quick Start Plug Shutter indicator 31 Shutter Open 64 pin description 58 64 Shutter Open request pin description 58 Shutter Open Request 61 S...

Страница 104: ...INDEX PAGE 4 W Warning air contaminants 7 8 Warranty information 9 Water Out In ports 31 Web interface accessing 71 web page layout 71...

Страница 105: ...INDEX PAGE 1 This page is intentionally left blank...

Страница 106: ...Engineered by Synrad part of Novanta Novanta Headquarters Bedford USA Phone 1 781 266 5700 Email photonics novanta com Revision X August 2022 2022 Novanta Corporation All rights reserved...

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