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90PUNTPI11 – 90PUNTPI12 – 90PUNTPI13 – 90PUNTPI21 – 90PUNTPI22 – 90PUNTPI23 

- 23 - 

 
 

 

Six-monthly checks

 

 
Electrical system 

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clean all the contacts of the secondary circuit to remove corrosion with fine grain abrasive material 

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tighten all connections 

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check protection devices and overloads (thermostats) 

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check welding parameters and correct them if necessary 

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check tightness of the power, transformer and welding control unit terminals 

 
Compressed air circuit 

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check the proper working order of the filter-regulator-gauge (FRG) unit 

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change any damaged connections 

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empty the air line filter 

 
When the welding machine is not going to be used

 

If the welding machine is not going to be used for some time there are a few things that need doing to prevent damage: 

 

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lock the cylinder in the completely retracted position 

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if the machine has to be stored away protect it by wrapping it with a protective film 

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the welding machine must be stored in a dry place 

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protect unpainted parts from dirt and corrosion 

 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for 90PUNTPI11

Page 1: ...3 5 Checking spot quality 3 6 Operating guide 3 6 1 Operating guide for autobody repair works 3 7 Description of the welding control unit 3 8 How to eliminate welding defects 4 MAINTENANCE INSTRUCTIONS 4 1 Maintenance information 4 2 Guide to maintenance 1 GENERAL INSTRUCTIONS 1 1 MANUFACTURER AND WELDING MACHINE IDENTIFICATION DATA Manufacturer data P E I POINT SRL Via Martin Piva 34 35010 Limena...

Page 2: ...a horizontal plane If it slants more than 15 with respect to the floor it could tip over An incorrect adjustment of welding pressure an erroneous setting of parameters or malfunctioning of the pneumatic system can all cause squirts of melted material during welding The spot welder must only be used on a horizontal plane An inclination of more than 15 with respect to the floor could cause tipping o...

Page 3: ... Welding cable length mm 2500 2500 Welding cable section mm 150 150 Arms diameter mm 20 20 Electrodes diameter mm 12 12 PNEUMATIC WELDING GUN 370 Welding capacity on steel mm 3 3 3 3 Electrodes force daN 370 370 Welding cable length mm 2500 Welding cable section mm 150 Arms diameter mm 24 24 Electrodes diameter mm 12 12 PNEUMATIC WELDING GUN 560 Welding capacity on steel mm 3 3 3 3 Electrodes forc...

Page 4: ... diameter mm 12 12 PNEUMATIC WELDING GUN 560 Welding capacity on steel mm 3 3 3 3 Electrodes force daN 560 560 Welding cable length mm 2000 Welding cable section mm 200 Arms diameter mm 24 24 Electrodes diameter mm 12 12 SPOTTER GUN single sided Gun cable length mm 2500 2500 Ground cable length mm 2500 2500 Gun and ground cable section mm 150 150 1 5 INTENDED AND NON INTENDED USE The failure to ob...

Page 5: ...e the machine is going to be used must be suitably illuminated for both production and maintenance free from dust acids corrosive substances or gases with temperatures ranging between 5 C and 40 C Altitude must be less than 1000 metres Relative air humidity 50 up to 40 C 90 up to 20 C Floor The machine must be put on a flat surface that must also be able to withstand its weight 2 2 ENERGY REQUIREM...

Page 6: ...et welding parameters on the control unit see next paragraph It is possible to use only clean water or water and glycol monopropylene with the following percentage Coolant liquid Ambient temperature C Glycole percentage 0 5 14 10 23 15 30 3 3 GETTING READY TO WELD WELDING CYCLE The welding cycle consists of three basic times Squeeze time it is the interval of time between the start of the cycle an...

Page 7: ...eze time Wear individual protection gear gloves glasses aprons etc Starting Gun Press the red push button to bring the electrodes to the point to be welded Once squeeze time has elapsed current will start passing between the sheets determining the welding spot Press black push button in order to clamp work piece without welding if clamping position is correct it is possible to complete the weld se...

Page 8: ...de welding preparation CLEAN BOTH SIDE OF THE 2 METAL SHEETS Clean both sides of the sheet metal on the area of the welding spot to insure a good electric contact between the electrodes and the metal sheets and between the sheets surfaces Single side gun electrode sharpening Sharpen the electrodes with a file The electrode shape should be regular and not flat typically round or conic Single side w...

Page 9: ...electrodes Increase squeeze time Increase force on the electrodes Reduce welding current The mark on the welded pieces is too pronounced Electrodes diameter is insufficient Force on the electrodes is too strong Welding current is too high Welding time too long Change the electrodes with ones of a suitable diameter Reduce pressure Reduce welding power time and current Spot strength is not good enou...

Page 10: ... tightness of the PE terminal q check condition of the electric contacts microswitches q check condition of the setting keypads potentiometers q see if there is any noise coming from secondary connections that have not been fixed properly q check that all the signalling lights are in proper working order Compressed air circuit q check for any air leaks q check line pressure welding pressure force ...

Page 11: ...ding control unit terminals Compressed air circuit q check the proper working order of the filter regulator gauge FRG unit q change any damaged connections q empty the air line filter When the welding machine is not going to be used If the welding machine is not going to be used for some time there are a few things that need doing to prevent damage q lock the cylinder in the completely retracted p...

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