TWS 800A/AZ - MHz Electronics, Inc
Contents
1. The soldering cycle starts by opening the drawer and placing the electric circuit in the drawer The preheat phase is started by closing the door To interrupt the cycle press reset Temperature and time during the preheat period and or during the reflow period can be read from the display The cooling state starts when after the soldering cycle the display indicates to open the door During the cooling phase the oven will emit an acoustic signal when the temperature has dropped to basic temperature To be ready to start a new soldering process is necessary to close the door 2 4 Hot bake cycle Hot bake function may be used to dehumidify fine pitch components One of the normal process of hot bake function is to set the temperature constant for 6 hours at 125 C It is always better to not submit the fine pitch to more than one hot bake cycle The hot bake function does not affect the intermetallic status of the pin Pressing the mode key you enter the edit mode now it is possible to recall the hot bake function Now set the chosen temperature to hot bake the fine pitch and set the hot bake cycle time expressed in hours Closing the door after having placed the PCB inside the oven it starts the hot bake cycle During the cycle the display visualises the running time from the beginning of the operation the internal temperature and the current function At the end of the cycle an acoustic signal informs the end of the hot bake cycle2. a person or thing liable to cause a hazard or loss Risk assessment document where it is indicated the possible risks caused by machines devices chemical substances etc Dangerous area any area next to the machine where the presence of a person constitutes risk or danger for himself Person in danger anyone inside the dangerous area Operator person allowed to set up use maintain clean and refurbish the machine Residuum risks Electrocution Contact with the machine Burns TWS AUTOMATION thanks you for your choice and wish to remind you that for any queries we welcome you to contact the customer assistance service TWS AUTOMATION Srl HEAD QUARTER Via Caboto n 9 54036 Marina di Carrara MS Italy Tel 0585 793989 Fax 0585 793739 TWS AUTOMATION Srl CUSTOMER SERVICE TECHNICAL ASSISTANCE Via Dorsale n 13 54100 Massa MS Italy Tel 0585 793989 Fax 0585 793739 e mail info tws automation com Web http www tws automation com
3. supply 220V one phase Power socket 220V 50 Hz Switch on the oven by the main switch located on the front next to the door Fig 3 CAP 7 WARRANTY CONDICTIONS TWS AUTOMATION guarantees this product as being free of defects in material design and workmanship at the time of original purchase and for a period of twelve 12 months immediately thereafter If during the period of the warranty this product malfunctions in normal use and service due to defective design materials or workmanship TWS Automation will repair or replace at its discretion the product under the conditions of the warranty The warranty is not applicable in circumstances other than defects in material design and workmanship The warranty does not cover the following B Period checks maintenance repair and replacement of parts due to normal wear and tear upgrading of software due to changes in parameters B Damage to the product resulting from Abuse or misuse including but not limited to failure to use the product for its normal purposes or in accordance with TWS Automation s instructions for use and maintenance of the product or the installation or use of the product in a manner inconsistent with the technical or safety standards in force Repairs performed by non authorised service workshops or opening of the product by non authorised persons Accident acts of God or any cause beyond the control of TWS Automation including but not limited t
4. 2 5 Controlled athmosphere cycle This function allows soldering in an atmosphere without oxygen Pressing the mode key you enter the edit mode now it is possible to recall the Nitrogen function Then it is necessary to set the temperatures and the soldering times Ton and Toff expressed in seconds suitable for the type of board one has to solder It also necessary to enter the activating and inactivating time expressed in seconds of the nitrogen in the pre heating phase and the oxygen set point you have to reach during the soldering phase The oven once one sets up the parameters will execute the process independently with the same operating functions of the soldering cycle described in the previous paragraphs the operator do not have to do anything more During the cycle the LCD visualises the temperature the elapsed time and the amount of oxygen inside the heating room In the pre heating phase the emission of nitrogen is made at regular intervals The operator can set the intervals The oxygen inside the heating zone decreases gradually The activation time allows decreasing the quantity of nitrogen 8 needed At the beginning of the soldering phase Heat State the emission of nitrogen will continue until the oven reaches the oxygen set point inside the heating room At the cooling phase the emission of nitrogen finish Once the heating room reaches the pre heating temperature the oven will be ready to start another soldering cycle
5. FORCED CONVECTION REFLOW SYSTEM TWS 800A AZ USER MANUAL ACKNOWLEDGEMENT The TWS 800A AZ Oven meets applicable safety standards The operator must satisfy all the requested safety standards The manufacturer declines any responsibility due to any damage and injuries derived to things and persons by an improper use of the machine and of the user s manual Information contained in this manual is subject to change without notice PREFACE Caution Read all instructions carefully before using this product Project and construction satisfy the following requirements UNI ISO 1 Concerning to safety this appliance conforms to the following directives CEI EN 60204 1 73 23 EN292 1 EN292 2 The present manual contains all the necessary information to use correctly and safety the item Take care of the manual and assure that who will operates the machine always read it especially the employer the responsible of safety the responsible for prevention of accidents the operator The manual is valid for all life of the machine One of the two given copies should be stored in an appropriate central archive the second one always kept close to the machine ready to be consulted In the case of property changing the customer must inform the manufacturer in order to inform the new proprietor of eventual and necessary modifications to apply to the machine NB no parts of this manual may be reproduced
6. Standard parameters are Ton during preheat 3 sec Toff during preheat 15 sec Oxygen percentage during reflow 0 1 2 6 Alarms and special functions If the set point temperature is not reached in the fixed time the oven will switch off automatically accompanied by an acoustic alarm If the soldering process is interrupted by opening the door the oven will start to cool down If the door is closed before the end of the cooling period the oven will emit an acoustic alarm In case of any functioning problem the oven will emit an acoustic alarm With an acoustic alarm on the oven will always switch off automatically CAP 3 OPERATION 3 1 Setting the soldering parameters The data memorised in the control unit by the manufacturer may be used for production These temperatures have been found to give good results according to our tests Depending on the thermal mass of the board to be soldered it s sufficient to vary the time of the process without modifying the temperatures The thermal mass of a PCB mainly depends on these factors Dimensions of the PCB large dimensions increases the thermal mass Thickness of the PCB large thickness increases the thermal mass Kind of components on the PCB for example large ICs large electrolytic capacitors or inductors and so on increase the thermal mass If a temperature recorder is available it s possible to obtain the best soldering profile by changing the temperatur
7. ality productivity consumption and dimensions Even if able to solder very large boards the oven structure has been design to be a bench top type to install it easily even in narrow spaces and thus is ideal for laboratories The electronic control system so as to minimise power consumption Even if is a small oven it is possible to obtain a great variety of thermal profiles so as to fulfil the most demanding request The oven s main parameters are constantly monitored by the LCD display of the computer always indicating the instruction for the operator and following parameters Temperature set point for each heating phase Actual temperature for each heating phase The forced convection of air is on horizontal line this due to a fan that blows the air from the inside to the surroundings The air flux is calculated to not shift those components from their original position The actual temperature of the heater is monitored by computer and a built in K type thermocouple TWS 800A AZ enables to use one more function denominated Hot Bake Hot Bake function is very useful to operators that handle fine pitch components Fine pitch components are designed with a case made of hygroscopic plastic material To avoid any humidity absorption they are available on market in sealed sticks and in under vacuum envelops Humidity may have negative effects on fine pitch components such as to cause a little oxidation status of the pin and or to provok
8. e definitive damage of the components itself during the soldering cycle This may happen because the humidity absorbed is concentrated only in some points of the fine pitch slowing down the warming up not uniformly Different temperatures inside the component may break it Before to solder the fine pitch on a PCB it is always better to submit it to a Hot Bake process which allows the evaporation of the humidity contained into the component In the nitrogen version the TWS 800A AZ oven has the function to solder in a controlled atmosphere It is possible to set the parameters to regulate the quantity of nitrogen inside the heating zone Once selected the Nitrogen function there are 3 settings more than time and temperature during pre eating The Ton function indicates for how many seconds the nitrogen introduction is activated On the contrary the Toff function indicates for how many seconds the nitrogen introduction is not activated It is possible to set the oxygen percentage inside the oven during the reflow the oven will maintain a lower oxygen percentage than the percentage set by the operator Soldering in an inert atmosphere Oxygen causes oxides on the joints surface and in the soldering paste causing a worse connection between the board s components Working with nitrogen you decrease the failure percentage and there are less residual of powder and solvent and less soldering balls More the boards assembled in nit
9. ersion Manufacturer limited liability The producer declines any responsibility due to an improper use of the machine such as e Non respect of the manufacturer s instructions e Non respect of the safety rules e Wrong assembling and installation of the machine e Wrong installation of the safety parts after maintenance Defected power supply not due to the machine e Serious loss of maintenance e Altering the equipment with no authorisation from the manufacturer e Using non original spare parts e Non observance of the instructions contained in this manual e Allowing personnel not well trained to come into contact with the item e Exposing the appliance to atmospheric agents such as rain sun humidity etc e Making useless temporary or permanently of electric protections e Allowing maintenance while the machine is on e Supplying the equipment with no safe material e Using the machine nearby unauthorised personnel CAP 1 INTRODUCTION 1 1 General description TWS 800A AZ is a powerful and compact reflow and convection oven with one heating zone ideal to perform soldering operation for small to prototype size SMT manufacturing to cure adhesive and pastes and to remove humidity from fine pitch parts prior to reflow using Hot Bake function The oven enables to solder boards up to 250mm s side Heating of the board is obtained by forced convection of hot air a well proven system giving the best compromise among qu
10. es and time parameters according to the thermal profile supplied by the manufacturer of the solder paste and to the specific kind of PCB 3 2 Board soldering Check that actual temperatures have gone over the warming up phase then it is possible to start the soldering process Usually the soldering cycle last approximately 5 minutes During the ready state it is possible to open the door and take off the board support using the appropriate tool and place the electric circuit on it After closing the door the preheat phase it will start 3 3 Reflow soldering The components and the PCB are heated by hot air which rises up gradually the temperature until the melting point of the metal particles of the solder paste is reached 3 4 Cooling The board cooling is obtained by opening the door of the oven Please wait 1 minute before to handle the board A relatively quick lowering of temperature gives also a finer lattice structure thus giving better mechanical characteristics anyway the cooling rate must not be as high as to procure a thermal shock to components CAP 4 TECHNICAL FEATURES 4 1 Board dimensions The heating surface may accept boards wide up to 250 mm depth 250mm with any height dimension 4 2 Heaters Infrared heater with heat resistant cable is used It is placed on the top of the heating room and transfers heat uniformly to all heating room reaching a perfect thermal balance 4 3 Temperature control Temperatu
11. ng the equipment 1 Maintain order in your working area Disorder in the working area increases the risk of an accident 2 Take conditions in your area into consideration Never expose your machine to rain Do not use the machine in damp or wet surroundings Provide good lighting Do not use the machine in the vicinity of combustible fluids or gases 3 Protect yourself against electrical shock Avoid body contact with grounded objects such as pipes radiators ovens etc 4 Keep non personnel away Do not let other persons use the machine Keep them away from your working area 5 Ptrotect your hands and store your boards in a safe place Always protect your hands when extracting boards Any tool and any soldered board not in use should be stored in a locked safe area 6 Do not overload your machine The machine operates better and safer in the performance range for which it is intended 7 Do not abuse the power cable Do not use the cable to pull the plug out of the power receptacle Protect the cable from heat oil and sharp edges 8 Do not overreach your work area Avoid abnormal body postures Maintain a safe distance and keep balance at all times 9 Avoid unintentional switch on Do not carry the machine that is connected to power whit your finger on the power switch Check that the switch is turned off before connecting the power cable 10 Repair only by electrical specialists The oven is in accordance with the releva
12. nt safety regulations Repairs must be performed only by an electrical specialist otherwise accidents can result for the operator Safety prescription Read carefully the user s manual in all its parts and follow the instructions Disconnect the plug from the power socket before carrying out any work of maintenance To transport the item uses the right instruments make sure that all operators keep themselves at the safety distance For any handling operations use and maintenance use always accident prevention devices Check that the socket is adequately earthen and that is suitable for the plug The oven reaches high temperature during operation To avoid burning it s necessary avoid absolutely to put hands inside the oven avoid absolutely to remove mechanical parts of the oven avoid to touch metal parts of the oven avoid to lay any object on the oven don t leave the oven unattended Avoid that children or unauthorised people may get close to the oven All the parts necessary to operate the oven are on the outside of the oven itself To prevent electrical shock hazard it s necessary avoid to remove parts to reach the internal of the oven if the power cord is not long enough to reach the socket make a prolongation by using wires of the same cross section of the original cable always remove the plug from the wall socket before making any servicing operation inside the oven Servicing must be done by au
13. o lightning water fire public disturbances and improper ventilation The product will not be considered defective in materials design or workmanship if it needs to be adapted changed or adjusted to conform to national or local technical or safety standards in force in any country other than that which the product was originally designed and manufactured This warranty shall not reimburse such adaptations changes or adjustment or attempts to do so whether properly performed or not or any damage resulting from them or any adaptation change or adjustment to upgrade the product from its normal purpose as described in the product manual without the prior written consent of TWS Automation Repair or replacement under the terms of this warranty shall not give a right to an extension to or a new commencement of the period of warranty Repair or replacement under the terms of this warranty may be fulfilled with functionally equivalent reconditioned units Replaced faulty parts or components will become the property of TWS Automation and must return to the manufacturers carriege paid This warranty covers only the eventual spares parts replacement or the eventual replacement of the entire machine excluding any other expenditure such as shipment of the good s or any eventual transport expenditures of our technicians GLOSSARY GENERAL INSTRUCTIONS ON SAFETY Danger anything that causes peril risk or that exposures to injury or loss Risk
14. re is controlled by a PID digital system with an accuracy of 3 A microprocessor controls the temperatures of the heater in real time switching it on and off so as to keep the actual temperature to the set point 4 4 Control unit The oven is equipped with a LCD control unit by which all the functions and parameters are controlled 4 5 Power supply and consumption The oven works at 200 Volt 50 Hz The maximum power consumption is 1 5 KW 4 6 Dimensions and weight The dimensions of the oven are width 560mm depth 350mm height 480mm weight 20 Kg CAP 5 SAFETY 5 1 Safety The employer must insures that the operator allowed to use the item must be instructed how to use the machine the operator allowed to use the machine must be instructed about the risks of their activity during the use of the machine and about the risks that other persons may cause TWS 800 oven is a professional machine so it is important to have good experience to obtain the expected results If the personnel is not well experienced he must be assisted by someone with enough experience with this type of machine The operator must be informed about the risks that TWS 800 oven may causes Caution When using power tools the following basic safety measures are to be observed to protect against electrical measures and to protect against electrical shock personal injury and risk of fire Read and observe these instructions before usi
15. rogen are more shining with no short circuits and the joints have cleaner contours The Tws 800 allows working in an inert atmosphere bringing nitrogen inside the soldering room An oxygen sensor directly from the control board controls the whole process CAP 2 FUNCTIONAL DESCRIPTION 2 1 Keyboard The function of the keys are the following RESET Reset of the soldering cycle confirms the modified data In editing state confirms the data as soon as it has been modified MODE Starts the edit mode to modify the internal parameters INC Increases the actual data Fig 1 DEC Decreases the actual data 2 2 Up dating menu Rotate the knob to start the oven Fig 2 To start the oven rotate the knob from position 0 to position 1 Fig 2 and the oven will reach the temperature as settled in the previous operation When the set point temperature is reached the oven is ready to start the soldering and or the hot bake process By the functioning key mode it is possible to access the editing status and so to modify thermal profiles data and to upgrade the temperature and preheating refusion processes To modify the data press mode again The display will indicate the actual data and the digit will flash every 0 5 sec Now confirm the data within 30 in order to record it otherwise it will come back the original data Pressing again mode the data will be recorded permanently 2 3 Soldering cycle
16. thorised and qualified people 13 connect the oven to a main socket having the same rated voltage and current of the oven The wall socket must be earthen Be sure the earth connection is efficient to remove the plug from the socket don t pull the cord pull the connector body protect the oven from rain moisture and spillage Use shoes giving adequate insulation from the floor It s also necessary do not close ventilation openings connect the exhaust outlet to the external environment TWS Automation disclaims any liability deriving from non observance of general safety rules and safety rules expressly specified herein 14 CAP 6 SET UP 6 1 Handling The oven is packed in a cartoon box on wood pallet Inside the packaging there is the user manual The weight of the oven 20 Kg and the package is such that two persons may easily set it on the installation site Handle it always by its bottom side The dimensions of the box are 580 mm length 500 mm depth and 370 mm height 6 2 Installation of the oven Connect the plug of the oven to the power socket dedicated to the oven 6 3 Air and nitrogen connection To operate with the nitrogen option it is necessary to set up the air and nitrogen system Pressure regulator Set the air pressure to 4 bar Air Pipe diameter 6mm Nitrogen pressure regulator on the cylinder Set the nitrogen pressure to 4 bar 15 6 4 Mains connection Power
17. transmitted stored in a retrieval system or translated into any language or computer language in any form or by any means without prior written permission All rights reserved This manual is divided into 7 sections Each section describes different aspects related to the use and maintenance of the unit INDEX Acknowledgement pag 1 Preface pag 2 Manufacturer limited liability pag 5 CAP 1 INTRODUCTION pag 6 1 1 General description pag 6 CAP 2 FUNCTIONING DESCRIPTION pag 7 2 1 Keyboard pag 7 2 2 Up Dating menu pag 7 2 3 Soldering cycle pag 8 2 4 Hot bake cycle pag 8 2 5 Controlled athmosphere cycle pag 8 2 6 Alarms and special functions pag 9 CAP 3 OPERATION pag 9 3 1 Setting the soldering parameters pag 9 3 2 Board soldering pag 9 3 3 Reflow soldering pag 9 3 4 Cooling pag 9 CAP 4 TECHNICAL FEATURES pag 10 4 1 Board dimensions pag 10 4 2 Heaters pag 10 4 3 Temperature control pag 10 4 4 Control unit pag 10 4 5 Power supply and consumption pag 10 4 6 Dimensions and weight pag 10 CAP 5 SAFETY pag 12 5 1 Safety pag 12 CAP 6 SET UP pag 15 6 1 Handling pag 15 6 2 Installation of the oven pag 15 6 3 Air and nitrogen connection pag 15 6 4 Mains connection pag 16 CAP 7 WARRANTY CONDICTION pag 17 Glossary pag 17 TWS 800A Az TWS 800 model Serial number Year of manufacturing Electric power Power supply Frequency Max length Max width Max height Weight KG V
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