SMT Printed Solder Paste Process 1. Screen printing technology Screen printing technology is the use of already made stencil, with a certain method to make the screen and printing machine direct contact, and make the solder paste in the stencil uniform flow, by the mask pattern into the mesh. When the screen off the printing plate, the solder paste in the shape of the mask pattern from the mesh off to the corresponding pad graphics on the printing plate, thus completing the printing of solder paste on the printing plate. 2. Printing solder paste process inspection Printing process is to ensure the quality of the surface assembly of one of the key processes. According to statistics in the PCB design is correct, components and board quality is guaranteed under the premise of surface assembly quality problems in 70% of the quality problems in the printing process. In order to ensure the quality of SMT assembly, must strictly control the quality of printed solder paste. Printed solder paste volume requirements are as follows: ① applied amount of solder paste uniformity, consistency. Solder paste graphics to be clear, try not to stick between adjacent graphics. Solder paste graphics and pad graphics play consistent, try not to misalignment. ② In general, the amount of solder paste per unit area on the pad should be 0.8mg / 2mm or so. For narrow-pitch components, should be 0.5mg / 2mm or so (in practice, with the template thickness and opening size to control). ③ printed on the substrate of the solder paste and hope that the weight value compared to the allowable deviation, solder paste to cover the area of each pad, should be more than 75%. ④ solder paste after printing, there should be no serious collapse, edge neatly, dislocation is not greater than 0.2mm, for narrow-pitch components pads, dislocation is not greater than 0.lmm. the substrate is not allowed to be contaminated by solder paste. Visual inspection, with a narrow pitch with 2 to 5 times magnification or 3 to 20 times microscope inspection. 3. Solder paste printing defects, causes and countermeasures Excellent printing graphics should be the vertical and horizontal direction of uniformity and bracing, full, around the clean, full of solder paste pads. With such a printed graphic placement device, after reflow soldering, will get excellent welding results. (1) Misalignment of solder paste pattern      Causes: improper alignment of the steel plate and pad offset; printing machine accuracy is not enough.      Hazard: easy to cause bridge connection.      Countermeasures: adjust the position of the steel plate; adjust the printing machine. (2) Solder paste graphics pull the tip, there are concave Causes: excessive squeegee pressure; rubber squeegee hardness is not enough; window oversized. Hazard: the amount of solder is not enough, easy to appear virtual welding, solder joint strength is not enough. Countermeasures: adjust the printing pressure; change the metal scraper; improve the template window design. (3) The amount of solder paste is too much Causes: template window size is too large; the gap between the steel plate and PCB is too large. Hazard: easy to cause bridging. Countermeasures: check the size of the template window; adjust the printing parameters, especially the gap between the PCB template. (4) uneven graphics, broken points Causes: template window wall smoothness is not good; printing plate times more than one, failed to wipe off the residual solder paste in a timely manner; paste thixotropy is not good. Hazard: easy to cause the amount of solder is insufficient, such as virtual welding defects. Countermeasures: wipe the template. (5) graphic staining   Causes: stencil printing times, failed to wipe clean in time; poor quality of solder paste; steel plate left shaking.   Hazard: easy to bridge.   Countermeasures: scrub the steel plate; change the paste; adjust the machine. In short, solder paste printing should be aware of the parameters of the paste will change at any time, such as particle size / shape, thixotropy and flux properties. In addition, the parameters of the printing machine can also cause changes, such as printing pressure/speed and ambient temperature. The quality of solder paste printing has a great impact on solder quality, so each parameter in the printing process should be treated carefully and the relevant coefficients should be observed and recorded frequently.

Measures to maintain SMT mounters 1. Strengthen the daily maintenance of the machine Mounting machine is a very complex high-tech high-precision machine, requires a constant temperature, humidity and very clean environment. Must be strictly in accordance with the requirements of the equipment to adhere to the daily, weekly, monthly, semi-annually, annually maintenance measures for routine maintenance. 2. Requirements for equipment operators (1) The operator should receive certain SMT professional knowledge and technical training. (2) Strictly in accordance with the operating procedures of the machine. Do not allow equipment operation with disease. Faults should be found in a timely manner to stop, and to the technical personnel responsible for or equipment maintenance personnel to report, remove before use. (3) require operators to concentrate on the operation process, to do eye, ear, hand hard. Eye diligence - to observe the machine operation process with or without abnormal phenomena. For example, the tape reel does not move, the plastic tape is broken, do not play INDEL mounting position is not correct. Ear diligence - ear to listen to the machine operation process there is no abnormal sound. For example, the abnormal sound of the mounting head, the loss of components abnormal sound, the abnormal sound of the transmitter, the abnormal sound of the scissors and so on. Hand hard - found anomalies in a timely manner to solve some of the minor problems operators can solve their own, such as picking up the plastic tape, reassemble the feeder, correct the placement position, play INDEX and so on. Mechanical and electrical problems, we must ask the maintenance staff to overhaul. 3. Develop measures to reduce or avoid errors In the mounting process, the most likely and most frequently occurring errors and defects is the wrong components and mounting position. Therefore, the following measures to prevent. (1) feeder programming, there must be a person to check and verify the feeder frame number position. Component value and programming table corresponding to the feeder number of component value is consistent. If inconsistent, must be corrected. (2) for the tape feeder, paste and install each plate of material and then on the material, there must be a person to check and verify the value of the new material on the plate is correct. (3) patch programming, must be edited once, check each placement step of the component number, mounting head rotation angle and mounting position is correct. (4) each batch of products mounted after the appropriate number of PCB, there must be a person to check. Problems found should be corrected in a timely manner by modifying the program and other methods. (5) mounting process, often check the mounting position is not correct; lost components more or less. Problems found in a timely manner to find the cause, and be excluded. (6) set up pre-soldering detection station, (artificial or AOI) In short, the mounting machine mounting speed and mounting accuracy is certain. How to play the role of the machine should be. The human factor is very important. To develop effective regulations and management measures to ensure the normal operation of the machine to ensure that the placement of quality and efficiency.  

Yamaha mounter YV100xg error code: Ea1311,Multi-Macs recognition error occurred Yamaha yv100xg fault prompt: Yamaha mounter YV100xg alarm after each production of 1 board, detailed error code: Ea1311, Multi-Macs recognition error occurred. Prompt for: Multi-Macs recognition error occurred in automatic operation, although automatic operation can continue in this state, but may lead to the deterioration of placement accuracy, please confirm the state of Multi-Macs with auxiliary adjustment. Yamaha yv100xg analyzes the problem: When Multi-Macs1&2 are turned off and not used in the machine adjustment, the alarm will be triggered once after every 1pcs of production. After Multi-Macs is turned off, it can be produced as usual. When attaching high precision components, it may not reach a certain precision, so it will be very fast when the components are identified. If this problem occurs without any warning, you should wipe the Multi-Macs under the camera, which may be dirty. You can also look in the Component Adjustments. The steps are as follows: Click on Component Adjustment and click on Component Test. This is a head recognition action.  Yamaha yv100xg* final solution:  1,Clean the dust on the MACS and camera  2, in the parts identification to identify whether the MACS can be identified  3.1, if the MACS is not in the center of the monitor, please change the MACS value in the machine parameters and then come back to identify, identify through and save the MACS picture phase, * then do a placement feedback   3.2, if in the center of the display but recognition, please change the brightness of the camera light and then recognition, recognition can pass after saving the MACS picture phase is done.  The following is the propaganda content Thanks for support: Yamaha yamaha mounter parts consumables, flyer, nozzle, solenoid valve, belt, inductor, board, etc. Yamaha yamaha mounter Fida: CL8x2MM CL0201, CL8x4MM CL12MM CL16MM CL24MM CL32MM CL44MM Yamaha yamaha chip machine vibration flyer: three tube vibration flyer, five tube vibration flyer, YAMAHA IC tray, original thimble, and a large number of CL flyer accessories Yamaha yamaha chip machine cylinder, air seat, pressure material cover, coil wheel, connecting rod, gears, springs, screws, fly up the tail, handle Yamaha yamaha bonder FV8*2MM FV8*4MM FV12MM FV16MM FV24MM FV32MM FV44MM Yamaha yamaha chip machine nozzle: 31A. 32A 33A 34A 39A 71 72 73 74 75 79 201 202 212 209 312 313 314 301 304 Yamaha yamaha mounter solenoid valve A010E1 5W 13W 32W, 35W 37W, 44W 55W A040-4E1-54W, 56W; complete vacuum generator; Yamaha yamaha mounter seals; O-rings, Y-rings, various oils: maintenance oil (NSK). Seal white oil (KM5-M7122-N0X), clear oil. Yamaha yamaha mounter piston 100X. 100XE. 100XG piston.100II piston Yamaha yamaha chip machine nozzle rod: YV100I nozzle rod I, YV100X nozzle rod, YV100XG nozzle rod Yamaha yamaha mounter belt: R axis belt, transport belt; top plate belt; head belt Yamaha yamaha mounter cylinders: main baffle cylinder PBDAS6X30 PBDAS6X40, secondary baffle cylinder clamping edge cylinder **door support rod; Yamaha yamaha chip machine drag chain: X-axis drag chain, Y-axis drag chain; head tank chain.YV100II tank chain YV100X tank chain Yamaha yamaha mounter inductor: stop plate inductor DZ-7232, in and out of the plate inductor, origin inductor, 7383 head to head inductor, etc. Yamaha yamaha mounter board: vacuum detection board, head I/O board, I/O board, VISION board, SYSTEM board; precision camera and other accessories on YAMAHA machines.   At the same time, our company specializes in the sale of various brands of SMT spare parts (feeder, board, motor, cylinder, nozzle, cutter, squeegee, camera, bearing, beak, laser, solenoid valve, vacuum valve, vacuum pump, sensor, belt, tank chain, optical fiber, pulley, reflector, support rod, purple light, receiving tape, stencil wipe paper, SMT filter cotton, feeder feeder, feeder pressure material cover, feeder (roll material wheel, flyer one-way wheel, flyer one-way bearing, flyer spring, etc.), with very mature R & D production experience.    Long-term commitment to the installation and commissioning of various brands of SMT placement machine. Repair. Large maintenance. Small maintenance and other services! Such as: Panasonic chip machine repair and maintenance, Fuji chip machine repair and maintenance, Siemens chip machine repair and maintenance, JUKI chip machine / Sony chip machine / YAMAHA Yamaha chip machine / Samsung chip machine and other brands of used chip machine maintenance, etc.;  

Yamaha feeder daily spot check and maintenance Purpose: In order to be able to use the belt feeder continuously and for a long time, regular spot checks and maintenance must be carried out. 1 Daily inspection Before using the belt feeder, please check the following items.  Inspection items Symptoms Countermeasures Is the fixing rod loose Please check the maintenance manual Is the belt guide loose  Refer to "Cleaning of belt guide". Is the screw loose Please tighten the screws Are there any deformed or damaged components? Repair and exchange Is there a missing component Repair and exchange 2 Cleaning of the belt guide If electronic components and other garbage fall into the gap between the material belt guide and the board, it will cause the loosening of the material belt guide and the deformation of the component transmission mouth, which will lead to the deviation of the component absorption position. If the electronic components are dropped into the gap between the belt guide and the plate, the belt guide will be loosened and the component transfer port will be deformed. If this happens, follow the steps below to clean up. Step1 Remove the belt guide. Loosen the screws holding the belt guide shaft above and remove the belt guide and the guide shaft. Use a screwdriver to turn the belt guide shaft to facilitate removal. Removal of the strip guide (Figure) step2 for sweeping. Please use a brush to sweep the debris between the strip guide and the plate. Sweeping the material belt guide (picture) step3 Check the operation status of the component transfer port. Confirm that the element transfer port is operating correctly. If it is caught or the operation is slow, please exchange the new belt guide in time. Confirm the operation status (Figure) step4 Attach the strip guide. Install the belt guide and guide shaft on the plate in reverse order. Please use a screwdriver to turn the guide shaft 180 degrees in counterclockwise direction to apply elasticity to the belt guide. Apply elasticity to the belt guide. Keep this position and tighten the set screw of the belt guide shaft. Afterwards, make sure that there is no gap between the belt guide and the plate. Cleaning of the belt guide (Fig.) Yamaha chip machine Fida yamaha feeder daily point of inspection and maintenance is introduced. This article is a Yamaha chip machine Fida CL model 8x4mm Fida to do the example, need Yamaha chip machine Fida friends can contact me:: Yamaha chip machine pneumatic Fida, yamaha cl models Fida  Yamaha chip machine YV100 series YG series pneumatic flyer YAMAHA 8MM FEEDER   Yamaha chip machine YV100 series YG series pneumatic flyer YAMAHA 12MM FEEDER   Yamaha Bonder YV100 Series YG Series Pneumatic Fiducial YAMAHA 16MM FEEDER   Yamaha Bonder YV100 Series YG Series Pneumatic Fiducial YAMAHA 24MM FEEDER   Yamaha Chip Machine YV100 Series YG Series Pneumatic Fiducial YAMAHA 32MM FEEDER   Yamaha Bonder YV100 Series YG Series Pneumatic Fiducial YAMAHA 44MM FEEDER   Yamaha YV100 series YG series pneumatic flyer YAMAHA 56MM FEEDER   Yamaha CL model 8*2mm pneumatic flyer, applicable models: YAMAHA YVL88II YV100II YVL112-2; YV88X YV88XG YV100X YV100Xe YV100Xg YV100XP YG100A YG100B YG200 YG300 models. Yamaha CL model 8*4mm pneumatic flyer for YAMAHA YVL88II YV100II YVL112-2; YV88X YV88XG YV100X YV100Xe YV100Xg YV100XP YG100A YG100B YG200 YG300 models. Yamaha CL model 12mm pneumatic flyer for YAMAHA YVL88II YV100II YVL112-2; YV88X YV88XG YV100X YV100Xe YV100Xg YV100XP YG100A YG100B YG200 YG300 models. YAMAHA CL model 16mm pneumatic flyer, applicable models: YAMAHA YVL88II YV100II YVL112-3; YAMAHA YV88X YV88XG YV100X YV100Xe YV100Xg YV100XP YAMAHA YG100A YG100B YG200 YG300 YAMAHA yg12 yg12-f yg24 yg24-f. YAMAHA CL model 24mm pneumatic flyer, applicable models: YAMAHA YVL88II YV100II YVL112-3; YAMAHA YV88X YV88XG YV100X YV100Xe YV100Xg YV100XP YAMAHA YG100A YG100B YG200 YG300 YAMAHA yg12 yg12-f yg24 yg24-f. YAMAHA CL model 32mm pneumatic flyer,applicable models: YAMAHA YVL88II YV100II YVL112-3; YAMAHA YV88X YV88XG YV100X YV100Xe YV100Xg YV100XP YAMAHA YG100A YG100B YG200 YG300 YAMAHA yg12 yg12-f yg24 yg24-f. YAMAHA CL model 44mm pneumatic flyer, applicable models: YAMAHA YVL88II YV100II YVL112-3; YAMAHA YV88X YV88XG YV100X YV100Xe YV100Xg YV100XP YAMAHA YG100A YG100B YG200 YG300 YAMAHA yg12 yg12-f yg24 yg24-f. YAMAHA CL model 56mm pneumatic flyer, applicable models: YAMAHA YVL88II YV100II YVL112-3; YAMAHA YV88X YV88XG YV100X YV100Xe YV100Xg YV100XP YAMAHA YG100A YG100B YG200 YG300 YAMAHA yg12 yg12-f yg24 yg24-f.

SMT mounter maintenance plan SMT mounters should have a regular inspection and maintenance system.   1. Daily inspection (1)Before turning on the power of the mounting machine, check the following items. ① temperature and humidity: temperature between 20 ℃ ~ 26 ℃, humidity between 45 ~ 70%. ② Indoor environment: require clean air, no corrosive gas. ③Convinced that there is no debris on the transmission rail and within the moving range of the mounting head. ④Check that there is no debris on the fixed camera and that the lens is clean. ⑤ Make sure that there is no debris around the nozzle bank. ⑥Check that the nozzles are not dirty or deformed and clean or replace them. (vii) Check that the tape feeder is correctly positioned in the station and that there is no debris on the station. (8) Check the connection of the air connections, air hoses etc. (2) Check the following items after turning on the power to the labelling machine. If the machine is not operating correctly, an error message will be displayed on the monitor. (1) After booting the system, check that the menu screen is displayed properly. ② Press the "Servo" switch and the indicator light should be on. Otherwise, switch off the system, restart it and turn it on again. ③If the emergency switch is working properly. ④Check whether the mounting head can return to the starting point (source point) correctly. ⑤Check whether there is abnormal noise when the mounting head moves. ⑥Check that the negative pressure of the suction nozzle of all the mounting heads is within the measuring range. ⑦ Check that the PCB runs smoothly on the guide rails. Check whether the sensor is sensitive. ⑧Check whether the side positioning and needle positioning are correct. 2. Monthly check (1) Clean the screen of the CRT and the floppy disk drive (2) X and Y axes - make sure there is no abnormal noise in the X and Y axes when the attaching head is moving. (3) Cables - Ensure that there are no loose screws on the cables and cable brackets. (4) Air connectors - make sure that the air connectors are not loose. (5) Air hoses - Check the tubes and connections. Be satisfied that there are no leaks in the air hoses. (6) X and Y motors - Be sure that the X and Y motors are not abnormally hot. (7) Overtravel alarm - Move the attachment head in the positive and negative directions along the X and Y axes. When the mounting head is moved out of its normal range, an alarm should sound and the mounting head can stop moving immediately. After the alarm, use the manual operation menu to make sure the mounting head can operate. (8) Rotating motor - check that there is no dirt on the timing drive belt and gears. Ensure that the placement head can be rotated without obstruction. Ensure that the head has sufficient torque. (9) Z-axis motor - check that the placement head can move smoothly up and down. Push the nozzle upwards with your finger to see if it moves smoothly. Move the head up and down out of its normal range, check that the alarm sounds and that the head stops immediately. (10) S-motor (if there is a scanning CCD) one by one make sure that the scanning head moves smoothly. (11) Negative pressure - check the negative pressure of all placement heads. If the negative pressure value is not normal, clean the filter in the nozzle shaft and if the filter in the vacuum discharge tube is dirty (blackened), replace it. (12) Transfer guide - Check the movement of the transfer guide. Check the tightness of the conveyor belt. Check that the conveyor belt is free of stains, scratches and debris. Check the automatic width adjustment of the guide rails. Check movement when adjusted to *large and *small widths. Check the parallelism of the guide rails and the transfer of the PCB at the population and exit points. (13) PCB limiter - check its movement and noise. (14) Side clamping, rear top block, buffer block - check their wear. (15) Clamps on the nozzle bank - check for flexibility and wear. (16) Cameras - clean all camera lenses and light boxes. (17) Camera lighting unit - check its movement and brightness. (18) Operating switches - check that all brakes are working properly on the VO signal screen. Check the emergency stop switch. (19) Warning lights - Make sure all lights are illuminated. Make sure they are all securely mounted. (20) Danger alarms, warning alarms - check that they are working. (21) Camera - carry out a "picture check". (22) Pick-up point coordinates - check the pick-up point coordinates of the feeder station. (23) Placement position - make sure that the components can be assembled to the specified location. The SMT mounter maintenance schedule is described.