Joy Technology Co.,Limited

First, the printed circuit board graphic alignment
Through the printer camera, the optical positioning point (MARK point) of the substrate and the stencil on the workbench is centered,
and then the X, Y, and Θ of the substrate and the stencil are finely adjusted to make the substrate pad pattern and the stencil opening. 

The graphics are completely coincident.

Second, the angle of the scraper and the circuit board during printing
The smaller the angle between the scraper and the stencil, the greater the downward pressure, 

the easier it is to inject the solder paste into the mesh, but it is also easy to squeeze the solder paste onto the underside of the stencil, 

causing the solder paste to stick. Generally 45~60 °. Currently, most automatic and semi-automatic printing presses use 60°.

THree)  the amount of solder paste applied to the smt solder paste printing machine (rolling diameter of solder paste)
1. The rolling diameter of solder paste is suitable for ≈h≈10~15mm. 2. The rolling diameter ∮h is too small to cause solder paste to be
printed and the amount of tin is small. 3. The rolling diameter ∮h is too large, too much solder paste is in When the printing speed is 

constant, it is easy to cause the solder paste to fail to form a rolling motion, the solder paste cannot be cleaned, resulting in poor printing release,

 poor solder paste after printing, etc.; and excessive solder paste is exposed to the air for a long time. The quality of the solder paste is unfavorable.

 4. During the production, the operator visually inspects the amount of solder paste on the stencil every half hour, and moves the solder paste outside the squeegee stroke on the stencil to the stencil every half hour. The solder paste is evenly distributed within the stroke of the blade, but it cannot be shoveled into the opening of the stencil.

Four)  The pressure of the scraper when the smt solder paste printing machine works
The blade pressure is also an important factor affecting the printing quality. The blade pressure actually refers to the depth of the blade falling, the pressure is too small, the blade does not adhere to the surface of the steel mesh, so it is equivalent to increase the printing thickness. In addition, the pressure is too small, the surface of the steel mesh will remain. A layer of solder paste can easily cause printing defects such as printing and bonding (bridge).

Five) the printing speed of smt solder paste printing machine
1. Since the speed of the scraper is inversely proportional to the viscosity of the solder paste, the speed is slower when there is a narrow pitch. The speed is too fast, the time for the scraper to pass through the opening of the steel mesh is relatively short, and the solder paste cannot fully penetrate into the opening. In the middle, it is easy to cause printing defects such as insufficient solder paste or missing printing.
2. There is a certain relationship between the printing speed and the blade pressure. The descending speed is equivalent to increasing the pressure. Appropriately reducing the pressure can improve the printing speed.
3. The ideal scraper speed and pressure should be just scraping the solder paste from the surface of the steel mesh.

Six, smt solder paste printing machine working gap
The printing gap is the distance between the steel mesh and the PCB, which is related to the retention of the solder paste on the PCB after printing.

Seven. Separation speed of stencil and PCB when smt solder paste printing machine works
After the solder paste is printed, the instantaneous speed of the steel mesh leaving the PCB is the separation speed, which is the parameter related to the printing quality. It is the most important in the dense pitch and high-density printing. The advanced printing machine has its steel mesh leaving the solder paste pattern. 1 (or more) a small dwell process, ie multi-stage demolding, which guarantees the best printing.

When the separation speed is too large, the sticking force of the solder paste is reduced, and the cohesive force of the solder paste and the pad is small, so that some solder paste adheres to the bottom surface of the steel mesh and the wall of the opening, causing printing defects such as less printing and tin collapse. The separation speed is slowed down. When the solder paste has a large viscosity and a large cohesive force, the solder paste is easily separated from the stencil opening wall and the printing state is good.

Eight, smt solder paste printing machine cleaning mode and cleaning frequency
Cleaning the bottom of the steel mesh is also a factor to ensure the quality of the printing. The cleaning mode and cleaning frequency should be determined according to the conditions of solder paste, stencil material, thickness and opening size. (Set dry cleaning, wet washing, reciprocating, wiping speed, etc.)



JOY TECHNOLOGY CO.,LIMITED can supply other DEK parts list as follows:
145817 CAMERA 'X' MOTOR AT/20' /
133126 CARRIAGE MOTOR
160702 CARRIAGE MOTOR
160704 CAMERA X SERVO MOTOR
191492 BOM^ASSY.^MOTOR^RISING TABLE
188988 rising table motor
188962 BOM^MOTOR^DRIVE^PRINT CARRIAGE
140737 rising table servo motor
140737 RISING TABLE SERVO MOTOR
140375/76/77 ACTUATOR MOTOR
186358/59/60 ACTUATOR MOTOR
185463 DESC:ACTUATOR^STEPPER^CHASE^ALIGNMENT


DEK Belt Drive Rear Rail Motor Maxon 157729
107686 SCB9 OPTO ISOLATOR I/P PCB 
107689 40 CHANNEL DIGITAL I/O PCB 
145014 EUROSYSTEM CONTROLLER RS485 16MHZ 
117933 117933 I.C. , STEPPER DRIVE CARD
114025 EUROAMP 10 CARD UL 
107758 TOOLING 
145520 dek camera y motor 
160706 dek camera y motor 
160708 RISING TABLE SERVO MOTOR
185003 MOTOR^CAMERA Y^(BG65X50-CI)^WITH 7.66:1 GEARBOX 
185002 MOTOR^CAMERA X^(BG65X50-CI)^WITH 7.66:1 GEARBOX 
145817 CAMERA 'X' MOTOR AT/20' 
160704 CAMERA X SERVO MOTOR
191492 BOM^ASSY.^MOTOR^RISING TABLE 
188962 BOM^MOTOR^DRIVE^PRINT CARRI

DEK Gas spring 186206
FRONT COVER DAMPER, 210N ( TXT ) DEK 140583
CAMERA MOUNT DEK 140127
CAMERA PLUG BRACKET DEK 119641
SMPSU, 650W WIDE RANGE I/P (FASTON TERMS) (TXT) DEK 160555
PSU^COSEL^450W MULTI O/P^(UL SEE TEXT 3) DEK 185312
BOM^^SOLVENT PUMP ASSY DEK 183390/183227/191088
BOM^^KIT^BAUMER SENSOR REPLACEMENT^ DEK 181563/114758
CAMERA, MOUNT DEK 145230
BOM^CABLE^CRIMPED ASSEMBLY^RAILS^ASM DEK 177055
BRG.STOP BRKT. 113163
FITTING, PNEUMATIC ELBOW MINIATURE, OD4MM x M5 THD DEK 107265
TOOLING PIN, MAGNETIC, 81mm, STD DIA. DEK 107785
FITTING^AIR^UNION^INLINE 6MM (TXT) DEK 190216
SOLENOID VALVE 5 PORT 2 POSITION DEK 165431


BOARD STOP DEK119673 CAMERA, MOUNT DEK145230 Green DEK 145011
PHOTO SENSOR (SUNX) DEK 112246
PHOTO SENSOR, SUNX DEK 109239
OPTO SENSOR DEK 107458
SENSOR^^FORK^4W - OMRON EE-SX675(TXT) DEK 191650
SENSOR^PHOTOELECTRIC DIFFUSE FHDK 14N5101/S35A
 DEK 183388 USC SOLVENT SOLENOID VALVE LOOM BOM ( TXT ) DEK 146111
DRAG CHAIN, CAMERA X VISION DEK 156028
DRAG CHAIN, CAMERA Y VISION Y DEK 160432
CYLINDER^PNEUMATIC^COMPACT^12X10 DEK 158921
RARE EARTH POT TYPE MAGNET DEK 107443
BOM^LOOM^CAMERA X ^MOTOR PWR DEK 191238
DEK BELT :


TIMING DEK 119176
BELT ,TIMING DEK G1237
BELT ,TIMING DEK G1212
BELT ,TIMING DEK G1296
BELT ,TIMING DEK G1140
BELT ,TIMING DEK G4915
BELT^^2MM X 816 LG ANTISTATIC^ DEK 178448 TRANSPORT BELT DEK 165520
'X' AXIS TIMING BELT DEK 145518
RISING TABLE BELT DEK 145099
BELT,TIMING DEK 107508
BELT ,TIMING DEK 107639
BELT , TIMING 'Y' AXIS, MATCHED PAIR DEK 145515
BELT ,TIMING DEK 119175
BELT ,TIMING DEK 129097
BELT (TIMING) DEK 101173
BELT (TIMING) DEK G4952
BELT ,TIMING DEK 107058


BELT ,TIMING DEK 119343 TRANSPORT BELT, 265, 3mm SINGLE (JOINED) DEK 122022
TRANSPORT BELT, 3mm ( TXT ) DEK G4957 TIMING BELT, CARRIAGE DEK 156039
BELT TIMING Y MOTOR DEK 145510 DEK STOPPER ARM DEK DEK 156281
EXTRUSION ASSEMBLY (520 LG) DEK DEK 157679
EXTRUSION ASSEMBLY (400 LG) DEK DEK 157678
EXTRUSION ASSEMBLY (300 LG) DEK DEK 157677
CASSETTE TYPE MANIFOLD^5/2 VALVE DEK 188760
CASSETTE TYPE MANIFOLD^3/2/DUAL VALVE 188759
DRIVE BELT^RAIL WIDTH DEK 185938
DRIVE BELT^TABLE LIFT DEK 185934
DEK Q-250D COVERS SYSTEM SWITCH LOOM BOM DEK DEK 163512
BELT, TIMING (16T10/1970), PAIR DEK 129250
BELT, TIMING (16T10/2350) DEK 129268
PRINT CARRIAGE MOTOR ( TXT ) DEK 133126
X' CAMERA MOTOR DEK 133127
CAMERA 'X' MOTOR AT/20' / DEK 145817
CAMERA 'Y' MOTOR (WITH CONNECTORS) DEK 133128
TABLE LIFT MOTOR DEK 133129
ACTUATOR "X"REAR LOOM BOM(TXT) DEK 119715
Y' GEAR PULLEY DEK 145511
BELT^TIMING 'Y' TRANSFER ( TXT ) DEK 145513/157936
REAR DAMPER, 235N DEK 140584
DRIVE BELT^PRINT CARRIAGE^ (TXT) DEK 185935
BELT^FLAT^ESD^NON-FRAYING DEK 178310
BOM^LIQUID LEVEL SENSOR^SOLVT TANK^USC ( TXT ) DEK 181161

183388 in or out pcb sensor 
188317 BOM^LOOM^CAMERA CARRIAGE SIGNALS 
185253 NEXTMOVE ES USB 6 STEP CONTROLLER(TXT) 
165675 CYLINDER 4 STROKE 20 BORE ( TXT ) 
157731 FRONT RAIL MOTOR & LOOM ASSEMBLY
185463 DESC:ACTUATOR^STEPPER^CHASE^ALIGNMENT 
183452 pressure sensor
181452 BOM^PAPER CLEAN MOTOR 
193377 boRAD STOPper 
193408 1394 CABle 
5157438 CLAMP BORAD
145014 X3 X4EUROSTEP CONTROLLER RS485 16MHZ
145015 X1 X2EUROSYSTEM CONTROLLER RS485 16MHZ EA 
160903 VISION CARD(lt gsx) 
160555 SMPSU,650W WIDE RANGE I/P 
191088 183390 BOM^SOLVENT PUMP^USC 


137516 CLAMP BORAD
185512 DUAL STEPPER CARD 
185020 NEXT MOVE ES INTERFACE CARD 
142253 CAN CONTROL CARD (MULTIMOVE) IO ( TXT ) 
191650 CAMERA SENSOR 
191103 RISING TABLE MOTOR CONTROLLER 
191650 PHOTO SENSOR EE-SX675 
181322 DEK ela camera 
198043 DEK I camera
198041 DEK I camera
DEK 265 GSX(LT) VSION CARD 145009
DEK 265 GSX(LT) VSION CARD
DEK 265 GSX(LT) CPU CARD
DEK 265 GSX(LT) DRIVER 153073
DEK 265 LT(GSX) PCIB40

112256 Opto Spacer Camera Mount
112788 Side Plate
107452 Spring  Post
107451 Top Plate
188232 LAMP^PASTE ROLL EA

157111 TABLE BRAKE MOUNTING BRACKET(TXT)
181322 BOM^CAMERA ASSY^GRAPHITE 2 ( TXT )
107298 BEARING CAP
145311 LINK COLLAR - BALL SCREW NUT
107645 GASKET
G0361  Spring

G0332  LEXO 123008 SPRING
181183 CONTACTOR WITH 24VDC COIL ( TXT )
107843 TEE (KQT04-M5)(TXT)
198041  DEK CBA40 repiaring
129097BELT ,TIMING
185312 PSU^COSEL^450W MULTI O/P^(UL SEE TEXT 3)
185934 DRIVE BELT^TABLE LIFT
133128 CAMERA 'Y' MOTOR (WITH CONNECTORS)
133129 TABLE LIFT MOTOR

119715 ACTUATOR "X"REAR LOOM BOM(TXT)
145511 Y' GEAR PULLEY
140584 REAR DAMPER, 235N
119747 BOARD AT LEFT OPTO LOOM
119746 BOARD AT RIGHT OPTO LOOM
165670  VALVE^SOLVENT DISPENSE^USC ( TXT )
181009  FIREBOARD-BLUE CARD

If there is no matching model of DEK Parts,pls contact us directly.
JOYSMT have good source & large stocks for major brand SMT Parts and Equipment. 
Such as SMT nozzle | nozzle holder | nozzle shaft,  SMT feeder|SMT feeder parts|Feeder calibartion jig, 
Laser ,Sensor, Servo Motor, Servo Driver, Controller Board Card, Solenoid valve,Ejector, Ball screw, 
SMT Belt, Cable, SMT Filter, SMT consumable Material etc.