Common problems and solutions to PCB drilling?

Causes of PCB Vias:During the drilling process, the drill bit is offset.

No suitable cover material was selected.

When drilling, there is no suitable presser foot, which causes the pin to be hit and the working plate is offset.

The parameters are adjusted incorrectly.

There are no dowels.

Foreign objects on the drill bit grip were not cleaned.

So what to do after the occurrence of an eccentricity:Clean the drill bit grip.

Check whether the parameters are correct.

Check the dimensional accuracy of the tool hole and the position of the upper dowel pin for offset.

Adjust the appropriate drill speed.

Use a flat cover material with the right hardness and softness.

Carry out nail board work as required.

Hole wall roughness: pay attention to the production parameters when drilling, the speed should not be too slow, and it needs to be matched with the feed speed.

Hole deviation: select a good drill bit and material, and produce under the normal number of laminations.

1.Improvement of eccentricity:

1) Broken needle; 2) uneven pressure foot;

3) The aluminum plate is not attached;

4) The chuck of the drilling machine is not clean, and the run out is too large;

5) Poor drill needle;

6) Failure of pressure foot cylinder (will lead to poor chip removal and deviation hole);

7) There are stolen goods in the board (PC board and aluminum plate, PC board and PC board, PC board backing plate, backing board and machine table);

8) Local expansion and contraction of plates;

9) Improper parameters (including drill needle life).

2.Management Experience: (Personal Opinion).

1) First of all, we need to learn the sorting and rectification in 6S, what things are useful and those are useless, and the planning of the process, that is, how to provide handling actions and time to reduce the idle time of the work bureau.

2) Formulate relevant specifications for employees' work, which are used to bind employees, and can be used as KPI performance appraisal.

3) Communication: This is very important, communicate with employees more, get to know them, and make them feel that you are relatable.

4) If you have strong ability, you can kick it out if you can't do it, because you have to understand that if he doesn't do a good job and you cover him, the boss won't go to him after he knows that there is a problem, but he is looking for you, and your own job is gone, so how can you protect others.

5) Everyone has advantages and disadvantages, and you need to mix them reasonably when using them.

6) Integrate many factors, management needs to implement humanized management, but also need Kanban Li Lap wheel management, the so-called Kanban management is that employees are generally not highly educated, so the ability to understand and execute is not necessarily strong, if you will some precautions or operation steps using the best way to add text description, can make it easier for employees to understand, get started faster.

.That's all for now.

3.Boost productivity

1) It is very important to plan this, every day your schedule needs to announce the production part number of the day, it is best to use a kanban board, write on it, what part number does that machine do. And for the part number of the raw pipe row, especially the express material number, reasonable arrangement.

2) The parameters are improved, the parameters are improved, and the number of stacks is increased.

3) Reduce needle breakage, needle length, needle short, needle pressure time.

4) Improve the efficiency of employees, 5) Reasonable maintenance of the machine, so that the machine can be in a normal state, in order to improve the grafting rate of the machine.

Okay, that's all, if you still have questions, you can contact again, thank you, your hands are tired.

Management Handling Inspection? The PCB stereotype machine is different, and I use the older one. If the customer's PCB is not too complex, you can use the "fastest" button in the software when engraving, but when you calculate, you must pay attention to the good and not have a short route.

After a long time, you will be proficient, and the benefits will naturally be high.

Choose a reasonable speed and position accurately.

1.Abnormal expansion and contraction of the inner layer of the multi-layer board;

2.There is dust on the table top, which causes the board to be uneven;

3.The aluminum sheet has creases, resulting in drill deviation;

The run-out is on the large side;

5.The pin is too deep, resulting in the plate is not completely fixed, and it is easy to deviate;

1.Parameter.

2.The pressure plate is uneven.

3.Vacuuming is not good.

4.Drill bit quality.

5. Equipment spindle.

6.The nozzle is uneven.

In high-speed PCB design, seemingly simple vias can often have a large negative effect on the design of the circuit. In order to reduce the adverse effects of the parasitic effect of vias, we can try to do the following in the design of PCB proofing boards

1. Consider both cost and signal quality, and choose a reasonable vias size. Consider using different sizes of vias if necessary, such as for power or ground vias, a larger size to reduce impedance, and smaller vias for signal routing. Of course, as the size of the vias decreases, so does the corresponding cost.

2 As can be seen from the two formulas discussed above, the use of thinner PCBs is beneficial for reducing the two parasitic parameters of vias.

3 Try not to change layers of signal traces on the PCB board, that is, try not to use unnecessary vias.

4. The pins of the power supply and the ground should be drilled nearby, and the shorter the lead between the vias and the pins, the better. Consider punching multiple vias in parallel to reduce the equivalent inductance.

5 Place some grounded vias near the vias of the signal layer change to provide the nearest loop for the signal. You can even place some extra ground vias on the PCB board.

6 For high-density high-speed PCB boards, consider using miniature vias.

Vias are one of the important components of multilayer PCB, and the cost of drilling usually accounts for 30% to 40% of the cost of PCB board making.

To put it simply, every hole on a PCB can be called a via. From the perspective of function, vias can be divided into two categories: one is used as an electrical connection between layers; Second, it is used as a fixed or positioning device.

In terms of process, these vias are generally divided into three categories, namely blind via, buried via and through via. Blind vias are located on the top and bottom surfaces of the printed circuit board and have a certain depth for the connection of the surface line and the inner line below, and the depth of the hole usually does not exceed a certain ratio (hole diameter). A buried via is a connection hole that is located in the inner layer of the printed circuit board and does not extend to the surface of the printed circuit board.

Both types of holes are located in the inner layer of the circuit board and are completed using a through-hole molding process before lamination, and several inner layers may be overlapped during the via formation process. The third type is called a through-hole, which runs through the entire board and can be used for internal interconnects or as mounting and positioning holes for components.

Because through-holes are process-easier to implement and less expensive, they are used in the vast majority of printed circuit boards instead of the other two vias. The vias mentioned below, unless otherwise specified, are considered as vias.