Brief introduction
pcb making machine is a mechanical and electrical, software, hardware, combined with each other high-tech products. As circuit board production tool that can take advantage of the physical engraving process , controlled by a computer program , put in a blank CCL unnecessary copper foil mill to form a user-defined custom circuit boards. Compared with the traditional circuit board welding manufacturing, circuit board welding or soldering larger devices used in small -scale production of manual welding , in the large-scale welding machines are used machines and SMT soldering or mass production, despite this, the board irregular devices and larger devices still require manual plug-ins and welding. Disadvantages circuit board production machine are: high prices, using a complex process that has not been the promotion of a large area.
Domestic and foreign technical background
pcb making machine is a mechanical and electrical, software, hardware, combined with each other high-tech products. It uses physical engraving process , controlled by computer , on a blank CCL milling the unnecessary copper foil to form a user-defined custom circuit boards. Taiwan Wo Yu, wisdom, Rong Yao and other companies have products in the domestic market , but due to high prices, using complicated process and other reasons, has not been large scale. Domestically, more than a dozen advertising engraving machine factory production, but no one specializing in the production of circuit boards dedicated software packages , most machines can only fit in the advertising industry . While some claim that the machine can engrave PCB board, but need to go through three to four software conversion, resulting in greater accuracy, loss of time and materials, as well as unnecessary trouble in transfer process. In 2001 we began to work on a variety of engraving machine principle and PCB software in-depth research, the development of a professional independent property rights PCB production system. According to the actual situation, the highest rates of domestic PROTEL compatible software , the direct use PROTEL PCB document information transfer process in the case without any direct output engraving data through custom data format control production machine to do carving, drilling , trimming work.
The status of the circuit board production methods
An electronic product development will inevitably have to go through the circuit board (PCB board ) of the trial process , the most common method is to design a good PCB files directly to a professional factory production line , circuit board called this process the "proofing", usually this process to go through three days to a week when asked. Because the questionnaire is the product's life when the product development process , a product development process through at least three or five times, ten times as many modifications so that developers can not tolerate too much waiting , so the laboratory environment developers through the various kinds of methods to achieve rapid system board . The main physical and chemical methods .
Physical methods: by using a variety of tools and power tools , etc. , do not need to manually put the circuit board copper engraved go. This method is laborious and low accuracy , only a relatively very simple lines it may be used. Chemical: by a protective layer covering the blank CCL, where the caustic solution to remove unnecessary copper etched, the method is currently used by most developers . Protective layer covering a variety of methods , mainly the traditional hand painted depiction party custom stickers pasted method , film and photographic methods PCB board thermal transfer printing method was developed in recent years.
Manual scan paint: the paint with a brush or a hard brush CCL hand-painted on a blank line shape , can be placed inside the drying solution corrosion.
Pasting stickers : There are a variety of bars and round stickers are made of sheet , a blank circuit board according to need different combinations of stickers, can rot the stick tight.
Photographic film : the PCB printed circuit board diagram on film by a laser printer , pre- coated with a layer of photosensitive material on a blank CCL ( CCL commercially coated good sell ) , exposure in the darkroom environment, developing, fixing , washing immediately after corrosion in solution .
Sublimation : by thermal transfer printers to print blank lines directly on the circuit board , and then into the etch solution.
Compare circuit board maker and chemical physical system Method
1, From the aspect of the finished plate adhesion to compare :
Because chemical etching entire board must be soaked in the solution corrosion, must be cleaned and dried after etching . In this process, the board after a hot and cold , wet one thousand , significantly affect the adhesion of the copper , the experiment may be due to the commissioning process to replace the electronic originals of different parameters cause copper peel off. So on the physical quality of the finished sculpture is better than chemical etching .
2, from the line edge aspects comparison:
Physical carved out lines boast trapezoid cross-section , the same angle knife edge angle and good linearity . Chemical methods can be seen under a microscope to see succeed inverted trapezoidal lines , irregular edges.
3, From the comparison operation process :
Physical methods because all processes are manual , labor intensive , and because of staffing stabilizing factor , it is impossible to achieve high-precision circuit boards. In addition , there are unrecoverable , the entire operation must be careful , accidentally cut off the engraved lines should not all have to be repeated . Relatively speaking, the operation is much more simple chemical method . In addition to hand- paint method described in recent years, few people have been using , the other in various ways is the current mainstream handmade plate. Laser printers are more price sensitive plate method makes most people willing to adopt . The pursuit of quality units even with a valuable thermal transfer printer to print directly to the circuit board .
A variety of problems in the system board methods
Hand-labor intensive method is the most important shortcomings, but accuracy is not easy to control, fewer people have been using. Here we focus on the most widely used chemical etching problem.
Accuracy depends on the accuracy of the print cartridges used in printers, printer to print out almost uneven lines of the corrosion process is likely to cause breakage, adhesions.
Board feel difficult to control exposure and development time, and different optimum exposure time for each batch of plates, need to go through repeated testing.
High corrosion process difficult to control. Unlike mass-produced single-corrosion, temperature of the solution, concentration, pH affect the quality of corrosion, do you want a piece of circuit board, there must be many times the accumulated experience. Otherwise, a lot of scrap material.
Photographic plate must be in full black low temperature preservation, the exposure process must also be in the darkroom conditions.
Silver (photosensitive material) and copper (corrosion products) are toxic, corrosive processes in operation to be careful, after etching waste disposal problems.
Finished board is difficult to control manually punching accuracy.
Developed sense of electronic circuit maker
So the PCB electronic circuit board production PCB designers have to face this link, because if there is no finished product, no matter how good the circuit design is wasted effort. But many inexperienced beginners and some electronic circuit design engineers, often due to PCB board and give a good design inspiration. This is for the domestic circuit board personnel training is very negative: domestic universities and electronic professional technical schools, vocational schools, training centers for military and civilian personnel, but also due to the PCB board and give experimental courses, resulting in students in the learning process lack of interest in learning, there is no ability after graduation, learned not to consolidate, even with the paper have not. Although the foreign circuit board production machine has entered the domestic market, high prices make the current lack of funding for schools and the fledgling Chinese electronics industry is difficult to accept. Domestic electronics industry urgently needed an efficient, automated, simple, low-cost circuit board production machine.
Ideas developed electronic circuit board production machine
From the above we can see that the physical process of making use of PCB board with high adhesion and good edge quality, we found that after a period of time to explore the application of modern CNC technology to control precise movement of the tool, the tool through the high-speed circuit board blank cutting, can produce fine PCB board. Also, precise movement of the machine can be used by the program control PCB design requirements drilled holes found in the corresponding position.
PROTEL PCB board is one of the largest manufacturer of computer-aided design software in the world, has entered the Chinese market eighties. Designed by the PROTEL PCB file format become the designer and bridge pcb, PCB file contains all of the designer's design intent, circuit board can be completely based on PCB files according to the drawings. Now many domestic universities included in the curriculum PROTEL design, electronic design software to complete in most cases PROTEL circuit board design.
Given the practicality and versatility PROTEL software, we developed the machine of choice for the PCB PROTEL compatible file format. In order to remove a user's trouble, we directly employ RPOTEL the PCB file format as a machine file format, designers simply complete PROTEL PCB document design, the machine will automatically read the designer's intent, automatic production line to meet the requirements of the board .
Use circuit board production machine
1. Export files from pcb board drawing software.
2. documents needed to open the system board system board systems, open. Open the top of the display map, election into the bottom of Fig.
3. Set the software.
a) Select the tool size; smaller size, the board engraving machine engraving the finer lines.
b) Select the communications port; usually a serial port.
4. Loaded Bonded Copper. Sure to flatten the board. (In order to ensure smooth board, you can make more use of some of the double-sided adhesive fixed)
5. Loaded knife. (Screwdriver knife is outside the hexagon; has two opposite screws on the spindle motor mounted knife holes).
6. power and adjust the position of the spindle motor engraving from the PC system board machine system.
a) After the plate is automatically switched out of the window at a distance (distance uncertain, sometimes this step would be a mistake, re-boot until the motor if an error occurs, turn off the power and pushed back plate automatically stop running).
b) the speed of the scroll bar to adjust the carving, it is located in the center-right point position (fast trimming back will be difficult to control).
c) to adjust the position of the spindle motor from carving. Click the Output Options, and set the x, y coordinates (generally X is positive, Y is negative), the coordinates of each update, the re-election of the board layer plate (equivalent to refresh the specific board type does not matter), and fill The decline in the value of the tool Z (best when carving changed back to the default).
Drop location tool tips: tip off about two sheets thick plate. Engraving machine can use the knob on the fine-tuning.
7. open spindle power (the power is turned on at the board prevent uneven, causing tool breakage), according to circuit board production machine test button to determine eagle carved from the starting position of the spindle motor can complete engraving pcb.
8. Press the button engraving system, uniform fine-tuning knob to adjust the engraving machine, so that the tool can be carved to the copper. This step should be very careful not to cut too deep nor too shallow. When carving is best to monitor the entire process, adjusting the relative distance between props and board. Such carved out of the pcb board to look good, easy to use.
9. hole:
a) After carving finished plate, switch off the spindle, you can not turn off the power switch.
b) the rise knives certain height, to be able to change the drill. (You can manually adjust, can also be controlled via the drop-liter Z Software Z)
c) the chisel to remove, replace the drill bit.
d) decrease the appropriate height, first open the spindle switch, then the speed of adjustment to a lower position (fast easily damaged drill bit) and set the correct aperture and Z lift value (slightly larger than the default value is recommended) and press the system software drilling button option can not be changed after the same system.
e) drilled hole after switching off the spindle, the tool is raised to a certain height, to remove the drill bit can be.
10. In other knife-edge (this step can be omitted because it has carved a rough cut)
a) choose a more blunt knife to cut edges. Plate from the knife drop position about two thick sheets. Carving knife test run to see whether the location is correct.
b) Open the spindle switch and click on the button and adjust the cutting edge of the tool is dropped tuning knob on the right from the system. Note that the knife does not fall too close to the board or off-board, otherwise it will cut the line.
11. After the first off the spindle switch off the power switch. Wash the top of the double-sided adhesive board. Note: Before installing Bonded Copper Step 4 must assess good plate size.
About PCBway
Since 2003 PCBWAY has been the leading PCB quick turn manufacturer specializing in both Prototype and Production quantities, Initially produced single-sided and double-sided printed circuit boards for the consumer electronics market. PCBWAY is ranked among the top 4 board fabricators in asia and is well-known for its expedited turn time capabilities and its reliable best on-time shipping record.
Today, we have over 450 operators with high modern facilities to manufacture multi-layer PCB up to 12 layers. Backing up with a group of professional engineers, and well established quality system. PCBWay has grown to become a major PCB manufacturer in Asia to serve in diverse customers base such as electronics appliance, communication, educational electronics, power supplies, Automationsetc.
Our mission is to become one of leading PCB manufacturer that provide in high quality product with total customer satisfaction.
