Related Manuals for EWM PMW 20
Summary of Contents for EWM PMW 20
- Page 1 Operating instructions welding torch PMW 20 099-002897-EW501 Observe additional system documents! 22.06.2023...
- Page 2 +49 2680 181-0. A list of authorised sales partners can be found at www.ewm-group.com/en/specialist-dealers. Liability relating to the operation of this equipment is restricted solely to the function of the equipment. No other form of liability, regardless of type, shall be accepted.
- Page 3 Service documents (spare parts) ................ 12 3.2.4 Part of the complete documentation ..............13 4 Machine description – quick overview ..................14 PMW 20 ..........................14 5 Design and function ........................15 Scope of delivery........................ 15 Transport and installation ....................16 5.2.1...
- Page 4 Notes on using these operating instructions 10 Accessories ..........................34 10.1 General ..........................34 10.2 Welding torch cooling system ..................... 34 11 Replaceable parts ........................35 11.1 PMW 20 ..........................35 12 Appendix ............................. 36 12.1 Searching for a dealer ......................36 099-002897-EW501 22.06.2023...
- Page 5 For your safety Notes on using these operating instructions For your safety Notes on using these operating instructions DANGER Working or operating procedures which must be closely observed to prevent imminent serious and even fatal injuries. • Safety notes include the "DANGER" keyword in the heading with a general warning symbol. •...
- Page 6 For your safety Explanation of icons Explanation of icons Symbol Description Symbol Description Indicates technical aspects which the Activate and release / Tap / Tip user must observe. Switch off machine Release Switch on machine Press and hold Incorrect / Invalid Switch Correct / Valid Turn...
- Page 7 For your safety Safety instructions Safety instructions WARNING Risk of accidents due to non-compliance with the safety instructions! Non-compliance with the safety instructions can be fatal! • Carefully read the safety instructions in this manual! • Observe the accident prevention regulations and any regional regulations! •...
- Page 8 For your safety Safety instructions WARNING Risk of injury due to improper clothing! During arc welding, radiation, heat and voltage are sources of risk that cannot be avoided. The user has to be equipped with the complete personal protective equipment at all times.
- Page 9 For your safety Safety instructions CAUTION Smoke and gases! Smoke and gases may lead to shortness of breath and poisoning! The ultraviolet radia- tion of the arc may also convert solvent vapours (chlorinated hydrocarbon) into poiso- nous phosgene. • Ensure sufficient fresh air! •...
- Page 10 For your safety Transport and installation CAUTION Obligations of the operator! The respective national directives and laws must be complied with when operating the machine! • Implementation of national legislation relating to framework directive 89/391/EEC on the int- roduction of measures to encourage improvements in the safety and health of workers at work and associated individual guidelines.
- Page 11 For your safety Transport and installation CAUTION Risk of accidents due to supply lines! During transport, attached supply lines (mains leads, control cables, etc.) can cause risks, e.g. by causing connected machines to tip over and injure persons! • Disconnect all supply lines before transport! Risk of tipping! There is a risk of the machine tipping over and injuring persons or being damaged itself during movement and set up.
- Page 12 3.2.1 Warranty For more information refer to the "Warranty registration" brochure supplied and our information regarding warranty, maintenance and testing at www.ewm-group.com! 3.2.2 Declaration of Conformity This product corresponds in its design and construction to the EU directives listed in the decla- ration.
- Page 13 Intended use Documents which also apply 3.2.4 Part of the complete documentation This document is part of the complete documentation and valid only in combination with all other parts of these instructions! Read and observe the operating instructions for all system components, especially the safety instructions! The illustration shows a general example of a welding system.
- Page 14 Machine description – quick overview PMW 20 Machine description – quick overview PMW 20 Figure 4-1 Item Symbol Description Plasma nozzle Shielding gas nozzle Torch shaft Torch body 099-002897-EW501 22.06.2023...
- Page 15 Design and function Scope of delivery Design and function WARNING Risk of injury from electrical voltage! Contact with live parts, e.g. power connections, can be fatal! • Observe the safety information on the first pages of the operating instructions! • Commissioning must be carried out by persons who are specifically trained in handling power sources! •...
- Page 16 Design and function Transport and installation Transport and installation CAUTION Risk of accidents due to supply lines! During transport, attached supply lines (mains leads, control cables, etc.) can cause risks, e.g. by causing connected machines to tip over and injure persons! •...
- Page 17 Design and function Functional characteristics Figure 5-1 Item Symbol Description Electrode High voltage Plasma gas Gas nozzle Work piece Plasma nozzle Shielding gas 5.3.2 Welding torch cooling system Material damage due to unsuitable coolants! Unsuitable coolant, coolants mixed with other types / liquids or use in an unsuitable tempera- ture range will result in material damage and loss of the manufacturer's warranty! •...
- Page 18 Design and function Functional characteristics Figure 5-2 Item Symbol Description Water cooling Shielding gas Shielding gas exit Part of the heat is released to the cooling system of the welding torch over the plasma nozzle and gas lens, and part of the shielding gas is blown out of the welding torch. 5.3.2.1 Permitted torch coolant Coolant...
- Page 19 Design and function Welding torch connection Welding torch connection Depending on the machine, various adapter sets are required to connect the welding torch. Figure 5-4 Item Symbol Description Quick connect nipple (9 mm / 0.35 inch) Coolant feed (blue) Quick connect nipple (9 mm / 0.35 inch) Coolant return (red) Quick connect nipple (5 mm / 0.2 inch) Shielding gas (yellow)
- Page 20 Design and function Ultraviolet radiation Ultraviolet radiation WARNING Risk of injury due to radiation or heat! Arc radiation can lead to skin and eye injuries. Contact with hot workpieces and sparks can lead to burns. • Use hand shield or welding helmet with the appropriate safety level (depends on the appli- cation).
- Page 21 Design and function Gas supply (shielding and plasma gas) 5.6.2 Plasma gas Figure 5-5 Item Symbol Description Pressure regulator Output side of the pressure regulator Shielding gas cylinder Cylinder valve • Place the shielding gas cylinder into the relevant cylinder bracket. •...
- Page 22 Design and function Tables of current carrying capacity A reduced quantity of plasma gas (item 2 on 4) results in a softer arc characteristic and a shallow penet- ration. An increased quantity of plasma gas (item 4 on 2) results in a deeper penetra- tion >...
- Page 23 Design and function Wear part replacement 5.7.1 Guide values for various setting parameters For the first welding tests, the following empirical values can serve as a guide for the various setting para- meters: Plasma gas quantity 0.2 l/min / 0.05 gal/min Shielding gas quantity 2-5 l/min / 0.5-1.3 gal/min Pilot arc current...
- Page 24 Design and function Wear part replacement 5.8.2 Changing the contact tip The choice of the plasma nozzle depends on the application and the associated current load > see 5.7 chapter. The plasma nozzle should be replaced when the nozzle channel is damaged and therefore no longer cir- cular.
- Page 25 Design and function Wear part replacement 5.8.3.1 Regrinding the electrode The electrode shape is decisive for a good welding result. Therefore, it is necessary to grind electrodes by machine to the correct shape before use. The electrode must be replaced if the electrode tip is exces- sively worn, tarnished too much or burned back asymmetrically.
- Page 26 Design and function Wear part replacement 5.8.3.2 Setting the electrode gap The electrode setting gauge is adjustable with a screw. As the electrode setting gauge is only pre- adjusted at the factory, make sure to check before first use that the electrode protrudes 14.8 mm / 0.58 inch (19.8 mm / 0.78 inch for the dental nozzle).
- Page 27 Commissioning Start of welding Commissioning Start of welding Before starting to weld, the arc has to briefly stabilise. At this stage, the burning pilot arc is not centred. Figure 6-1 6.1.1 Double arc When the current load is too high or the torch held at too steep an angle, a second arc will form between workpiece and plasma nozzle.
- Page 28 Maintenance, care and disposal General Maintenance, care and disposal General DANGER Risk of injury due to electrical voltage after switching off! Working on an open machine can lead to fatal injuries! Capacitors are loaded with electrical voltage during operation. Voltage remains present for up to four minutes after the mains plug is removed.
- Page 29 Information on returning used equipment or collections can be obtained from the respective municipal administration office. Devices can also be returned to EWM sales partners across Europe. Further information on the topic of the disposal of electrical and electronic equipment can be found on our website at: https://www.ewm-group.com/de/nachhaltigkeit.html.
- Page 30 Rectifying faults Checklist for rectifying faults Rectifying faults All products are subject to rigorous production checks and final checks. If, despite this, something fails to work at any time, please check the product using the following flowchart. If none of the fault rectification procedures described leads to the correct functioning of the product, please inform your authorised dea- ler.
- Page 31 Rectifying faults Checklist for rectifying faults Pilot arc ignites but no main arc forms Distance between workpiece and torch too high Decrease distance to workpiece Contaminated workpiece surface Bad current transfer on ignition Check the setting on the "Tungsten electrode diameter/Ignition optimisation" rotary dial and in- ...
- Page 32 Rectifying faults Vent coolant circuit Vent coolant circuit Figure 8-1 • Switch off the machine and fill the coolant tank to the maximum level. • Unlock the quick-connect coupling with a suitable tool (connection open). To vent the cooling system always use the blue coolant connection, which is located as deep as possible inside the system (close to the coolant tank)! Figure 8-2 •...
- Page 33 Technical data PMW 20 Technical data PMW 20 Duty cycle DC at 40° C 20 A (100 %) Machine cooling indirect water cooling Coolant requirement 1 l/min (2-3 bar) Coolant pressure min. 2,0 bar Coolant pressure max. 4,0 bar min. Coolant flow 0,5 l/min (Coolant return) max.
- Page 34 Performance-dependent accessories like torches, workpiece leads, electrode holders or intermediate hose packages are available from your authorised dealer. 10.1 General Type Designation Item no. EAG PMW 20 Electrode setting gauge 094-025465-00000 10.2 Welding torch cooling system Type Designation Item no.
- Page 35 094-020283-00000 1.2 x 24.2 Plasma nozzle 394-002697-00000 0.8 x 29.2 Dental Plasma nozzle (dental) 394-001118-00000 CP PHW 20 Centring piece 394-018934-00000 C PMW 20 Collet 094-019147-00000 1.0X47mm WL10 Plasma electrode 394-002695-00000 1,0x52 Tungsten electrode (dental) 094-025516-00000 Set PMW 20 Spare parts box...
- Page 36 Appendix Searching for a dealer Appendix 12.1 Searching for a dealer Sales & service partners www.ewm-group.com/en/specialist-dealers "More than 400 EWM sales partners worldwide" 099-002897-EW501 22.06.2023...
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