ESAB MEK 4 Service Manual Download Page 8 | Manualshive

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cmek0de1

cmek0e04

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Circuit board 0486 205 880 is supplied with capacitor C35, on circuit board 0486 205 882

capacitor C35 is replaced by diode D35. See the description of operation, items 4a and 4b.

Component positions, circuit board AP01

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Summary of Contents for MEK 4

Page 1: ...cmek0p00 0740 800 085 Valid for serial no 431 xxx xxxx to 826 xxx xxxx 040426 MEK 4 Service manual...

Page 2: ...E 25 CONTROL PANEL AND CONNECTIONS 26 ACCESSORIES 27 SPARE PARTS 28 NOTES 28 READ THIS FIRST Maintenance and repair work should be performed by an experienced person and electrical work only by a trai...

Page 3: ...lding unit in accordance with applicable standards S Do not touch live electrical parts or electrodes with bare skin wet gloves or wet clothing S Insulate yourself from earth and the workpiece S Ensur...

Page 4: ...time RP04 Potentiometer 10 k for setting the crater fill time SA01 Switch 2 4 stroke changeover When the switch is closed 4 stroke control mode is selected SA02 Switch Crater fill function On Off Whe...

Page 5: ...5 cmek0de1 WIRING DIAGRAM Valid for serial no 431 xxx xxxx MEK 4 cmek0e01 See page 17...

Page 6: ...6 cmek0de1 WIRING DIAGRAM Valid for serial no 514 xxx xxxx to 826 xxx xxxx MEK 4 See page 17...

Page 7: ...D35 See items 4a 4b and 8a 8b in the Function Description See also the component positions diagram 5 The circuit board is now contained in a larger screened enclosure item 227 in the Spare Parts List...

Page 8: ...04 Circuit board 0486 205 880 is supplied with capacitor C35 on circuit board 0486 205 882 capacitor C35 is replaced by diode D35 See the description of operation items 4a and 4b Component positions c...

Page 9: ...on terminals G01 and G02 supply 42 V to a Miggytrac unit if this is used together with the MEK 4 DC power supplies Diodes D30 D33 rectify the 42 V supply to 60 V Capacitor C61 smooths the supply which...

Page 10: ...ling cmek0e09 The emitter of the transistor in optocoupler IC10 is connected to 0 VB i e to the neutral of the power unit voltage reference The crater fill function operates as follows Phase 1 When in...

Page 11: ...e 2 continues also for a maximum of 1 27 seconds Phases 3 and 4 Phases 3 and 4 are repeats of phases 1 and 2 After phase 4 during which wire feed speed is 50 of the original value welding concludes wi...

Page 12: ...B and 0 VB voltages are supplied by the power unit via connector XP01 The voltage adjustment circuits are galvanically isolated from the other circuits at circuit board AP01 The remote control unit fo...

Page 13: ...tentiometer RP02 on the front of the unit can be used to control the power unit output voltage The 15 VB and 0 VB voltages are supplied by the power unit via connector XP01 The voltage adjustment circ...

Page 14: ...d unit is being used its gas valve is connected via pins K and J in the remote control connector XS13 5b Gas valve Applies to MEK 4 with serial number 514 and above cmek0e24 The gas valve is connected...

Page 15: ...sed 4 stroke control mode is selected This means that first closure of the trigger switch operates the gas valve with the wire feed motor starting and the power unit contactor operating when the trigg...

Page 16: ...ontrol unit Potentiometer RP01 is disengaged when a remote control unit is connected to input XS13 The circuit board microprocessor senses that the remote control unit is connected by means of the vol...

Page 17: ...board 0486 205 880 will start at a speed of 3 m minute when the creep start is activated If the set speed is less than 3 m minute wire feed starts at the set speed cmek0e16 Activation of creep start c...

Page 18: ...diate wire feed unit or for a PKE push pull welding gun If an intermediate wire feed unit is being used in extreme applications low mains voltage and long cables an additional 4700 F smoothing capacit...

Page 19: ...of 660 Hz Comparator IC5 2 converts the sine wave signal from the tachogenerator to a square wave at the same frequency Pins XP01 R and XP01 S are used if there is a separate display unit for showing...

Page 20: ...op to too low a level wire feed is stopped as described in section 1 above The processor also monitors speed If the wire speed deviates from the set value by more than 1 5 m min for more than five sec...

Page 21: ...S13 S MEK 25 intermediate wire feeder unit 15b Remote control input 23 pole Applies to MEK 4 with serial number 514 and above cmek0e26 Remote control input The following items can be connected to the...

Page 22: ...kits differ for the MEK and the LAW units The instrument can be used only when the wire feeder unit is connected to an LAW power unit The display board has two rows of 7 segment displays with three di...

Page 23: ...23 cmek0de1 Circuit diagram display board AP02...

Page 24: ...g surface Limit the angle of rotation of the wire feed cabinet using the straps supplied When moving the equipment do NOT pull on the torch WARNING MAINTENANCE Regular maintenance is important in ensu...

Page 25: ...the pressure is not too high Figure 1 Figure 2 To check for correct feed pressure feed the wire out against a piece of insulating material such as a piece of wood With the pistol held about 5 mm from...

Page 26: ...only 882 and 883 models 11 Strap securing points The strap must be used to secure the wire feed unit to the power unit during transport 12 Hole for fitting connector for PKE welding gun with integral...

Page 27: ...836 883 0469 836 888 0469 836 893 0469 836 898 Connection set 25 metre 0469 836 884 0469 836 889 0469 836 894 0469 836 899 Connection set 35 metre Item Ordering no Denomination 3 0455 173 881 Digital...

Page 28: ...28 notes SPARE PARTS The spare parts list for the MEK 4 is published in a separate document with filename ordering no 0469 952 990 NOTES...

Page 29: ...29 notes...

Page 30: ...l AB Gothenburg Tel 46 31 50 90 00 Fax 46 31 50 93 60 SWITZERLAND ESAB AG Dietikon Tel 41 1 741 25 25 Fax 41 1 740 30 55 North and South America ARGENTINA CONARCO Buenos Aires Tel 54 11 4 753 4039 Fax...

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