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H&H P280, Manual, Page: 15 / 28

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H&H P280 Manual Download Page 15

15 
 

 
 
2.    CLOCK 
 

Test Point 

 

Function 

Value 

 

JP2-4   

 

Line Sync 

5 V 60 Hz, 50% Duty Cycle 

 

 

 

 

 

 

square wave 

 

JP3-8   

 

Line Sync 

5V 60 Hz pulse normally 

 

 

 

 

 

 

low 

 

 

 

 

 

 

Active  on JP2-4 rising  

 

 

 

 

 

 

edge 

 

U5-38   

 

Microprocessor   4MHz +/- 440 Hz  

 

 

 

 

Clock 

3.    SYNC 
 

Test Point 

 

Function 

Value 

 

JP3-7    

 

Sync lost 

5V active when sync lost 

 

JP3-6   

 

Search   

5V active when searching 

 
4.    ADJUST 
 

Adjust R22 to set the intensity of the LEDs 

 
 
 
 
 

 

 

 
 
 
 
 
 
 
 
 
  

 

 

 

 

Summary of Contents for P280

Page 1: ...CONTROLLER H H RESISTANCE WELDERS 28701 S Hwy 125 Afton OK 74331 USA Toll Free 800 835 2965 Tel 918 257 5150 Fax 918 257 4550 www hhwelders com hhwelders wavelinx net OUR HANDSHAKE IS AS STRONG AS OU...

Page 2: ...2 NOTICE FOR CUSTOMER MAINTENANCE MACHINE OPERATORS T I P C L E A R A N C E N O T T O...

Page 3: ...Government Safety Standards and All Industrial Safety Standards INDEMNIFICATION User agrees to indemnify and hold harmless Seller of and from any and all claims or liabilities from accidents involving...

Page 4: ...repaired or at our option replaced without charge for material Freight will be charged for shipment back to the customer Should you require to return the unit for repairs you must ship both the PSIO a...

Page 5: ...r 50 or 60 cycles second An extremely valuable monitor circuit is the power input fluctuation monitor which has a convenient indicator located on the Power Supply Input Output PSIO board on the rear o...

Page 6: ...through the head of side skin Therefore no holes are punched in the cabinet so each installation can be flexible For control unit only a 1 5 inch hole is ample for passage Control with SCR pack will...

Page 7: ...e a number or command can be kept The SOFTWARE will allow the operator to look at the contents of any box or memory and leave it alone or change the controls When the controller has been placed in the...

Page 8: ...n Program variables are stored in EPROM No Battery Required and are called for viewing by depressing the B button Each depression will advance the program location one position The WELD Schedule indic...

Page 9: ...If the repeat and seam modes are off then timer defaults and acts like a normal anti tie down mode To set the timer register advance to the IMPULSES register with the B key Then press and hold the F...

Page 10: ...any time the operator changes squeeze time he should also check the time delay register Caution should be used when setting the motor delay If the delay value is much greater than the combined value o...

Page 11: ...epeat Repeat sequence until footswitch is Spot ONLY I N D I C A T O R D E F I N I T I O N F U N C T I O N 1 Dual 7 Segment Display A two digit display reading weld schedule number or program data in m...

Page 12: ...wer due to it s own weight 5 ST1 LED When illuminated the first stage of the footswitch has been activated 6 ST2 LED When illuminated the second stage of the footswitch has been activated S T A T U S...

Page 13: ...he number of times the heat cool sequence occurs for the weld schedule Depress Key B IMPULSES OFF UP CYCLES OFF UP MAX ON 6 UP Cycle 0 1 to 9 9 The UP parameter is also called UPSLOPE The control will...

Page 14: ...N b All displays dark for 1 to 2 seconds c Line frequency displayed for 1 second d Weld Schedule in window and Weld Schedule LED lit or 88 if footswitch closed Check ST1 and or ST2 if lit e Weld Sched...

Page 15: ...e wave JP3 8 Line Sync 5V 60 Hz pulse normally low Active on JP2 4 rising edge U5 38 Microprocessor 4MHz 440 Hz Clock 3 SYNC Test Point Function Value JP3 7 Sync lost 5V active when sync lost JP3 6 Se...

Page 16: ...aged it is recommended to discontinue operating the welder and immediately disconnect the main power until proper repairs have been made Damage to the main welding transformer can occur if the main po...

Page 17: ...classification is SINGLE PHASE and THREE PHASE Single phase three phase refers to the type of input power that must be supplied for your machine However each of these two classes has characteristics t...

Page 18: ...ces and then grow into a nugget as the weld time progresses CONTACTING SURFACES Contacting surfaces consist of the electrodes and the material being welded To reduce the resistance at the electrode ti...

Page 19: ...e to the electrodes due to pitting and spitting DEFINITIONS OF TERMS ARM The extension from frame to hold the electrode assembly COOL TIME Current off cooling time in an impulse ELECTRODE Device to ap...

Page 20: ...he next location SEQUENCE OPTIONS Precompression pre heat quench and temper are four typical optional intervals or functions that may be supplied with your sequence The sequence will consist of the fo...

Page 21: ...remain at the high level In Variable Pressure electrode force rises to the high level at the beginning of hold Variable Pressure machines can also be used in the Constant Low and Constant High modes I...

Page 22: ...rfaces or use solvents 3 Months Inspect entire Inspect all air lines and connections pneumatic system for leaks Replace any worn or damaged hoses Use certified tip force gauge in lieu of calibration o...

Page 23: ...se lithium grease w diaphragm head assy Monthly Clean air element Turn off air supply and remove element at air filter from filter housing Clean with clear warm water or recommended solvent Blow out w...

Page 24: ...elding may lead to cracking problems SPOT SPACING If spots are located too close to each other a large portion of the welding current to produce the second or subsequent spots will shunt through the s...

Page 25: ...strength SURFACE BURNING CAN BE CAUSED BY 1 Dirty material or fouled electrodes 2 Too much penetration of nugget 3 Improper machine sequence Usually simple visual inspection will be sufficient to obs...

Page 26: ...hanical properties of the weld To minimize porosity use clean material and avoid expulsion Unit pressure must be high Some times a combination of dissimilar metals will be prone to give porosity Usual...

Page 27: ...If failure occurs by shearing through the nugget the weld is considered unsatisfactory If failure occurs by tearing a button from the sheet the weld is considered satisfactory The twist test consists...

Page 28: ...variation should be stated B Establish what size class and contour electrodes are to be used with each weld setting and specify how often the operator is to replace electrodes C Establish procedure fo...

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