solder sucker

When the solder paste is in a heated environment, the solder paste backflow is divided into five stages,1. First, used to achieve the required viscosity and silk screen performanceThe solvent starts to evaporate and the temperature increases slowly.(About 3 °C per second ),Limit boiling and splash to prevent small tin beadsAnd,Some components are sensitive to internal stress. If the external temperature of

Definition of PCB layer:Solder Mask: Solder masks, refers to the board on the green oil on the part, because it is negative output, so actually there is solder mask part of the actual effect is not on the green oil, but tin plating, silver. Help solder layer: Paste mask, is the machine to use the patch, is corresponding to all SMD components of the pad, the size

For solder mask Layers and paste mask Layers Two concepts, there are many beginners do not understand the concept of these two layers, because they do have some similarities, on their own view, tribute everyone reference: Solder Masks Layers: That is, the solder mask layer, is the PCB board (surface patch Pads, plug-in pads, vias) outside a layer of green oil, i

An error occurred in the design rule check (that is, DRC). In my experience, the majority is a safe distance error, that is, the distance between your component and the component or between the wire and the element or between the wire and the wire is less than the set safe distance. You can remove the distance or modify the design rules. If you do not require a safe distance (such as a low operating voltage), you can ignore the DRC layer off will not be green. ---from BaiduPROTEL:

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Tear Drops are caused by excessive drip connections between the pad and wire or between the wire and the guide hole. The purpose of setting the tear drops is to avoid the impact of a huge external force on the circuit board, avoid breaking the

)There are 2 layers: "Drill Drawing" and "Drill Guide". Used to draw the borehole aperture and hole positioning.Five, Solder Mask (solder layer)There are 2 layers: top (Top level) and bottom (bottom). The solder pads on the solder resist layer are drawn on the printed circuit board and the protective area around the vi

Mechanical, mechanical layerKeepout layer prohibit wiring layersTop overlay upper layer screen printing layerBottom overlay bottom screen printing layerTop paste, upper layer solder plate layerBottom paste Bottom solder pad layerTop Solder Solder LayerBottom solder bottom

All along, the PCB in each layer, such as: solder layer, paste layer, top overlay layer and so on these smattering. Look carefully today, to introduce you to the wrong place also please correct me. 1.mechanical mechanical layer is to define the overall appearance of the PCB, in fact, we say that the mechanical layer is the entire PCB board shape structure. The prohibition of wiring layer is defined in the cloth electrical characteristics of the copper

Wave automatic soldering technology has been used in the electronics industry for many years, but the late failure of solder joints is still a headache, which greatly affects the quality and reputation of electronic products.This paper intends to make a preliminary study and discussion on the basis of practical experience.The so-called "late failure of solder joints", refers to the surface appears to be the

DFM test in cam350 Original article address:DFM Test 1 Author:Lanyuxuan Most of these functions are concentrated under the analysis menu. 1. Silk to solder spacing this function is used by the software to automatically check the spacing between the screen printing layer and the solder mask layer. Analysis-> the "check silkscreen" dialog box is displayed. first,

pieces of the goot tool to assist welding. Some friends useYou can use the marker or even the toothpick.4. Hot air gunIt is best to use a heat gun with the function of numerical control constant temperature, remove the wind nozzle and directly blow the welding. We use the 950 heat gun from Tianmu.5. FluxWe use the 'solaule 'sold by the company, which is a soft paste similar to butter. Advantage:1. Excellent welding performance.2. No corrosive effect on IC and PCB.3. the boiling point is only sl

layer is generally used to draw the border (Border) of the printed circuit board. Generally, only one mechanical layer is needed. Has Mech1-Mech4 (4 mechanical layers ).Iv. drkll Layers)There are two layers: "Drill drawing" and "drill guide ". It is used to plot the positioning of the hole diameter and hole.V. Solder Mask (Solder Mask)There are two layers: top layer and bottom layer ). When drawn on the

The role of each layer in pads: 1) top layer 2) bottom layer of bottom 3)-19) layer I intermediate signal Layer 21) Solder Mask top layer mask (Solder Mask) 22) paste mask bottom layer Solder Paste Layer 23) paste mask top layer Solder Paste Layer 24) drill drawing Hole Position layer, each of which has a

This article is the author's graduation thesis and his own code; Simulation Software Design of automatic batching system for Welding Electrode Design Content Welding rods are widely used in steel structures in construction and industry. A electrode can be divided into solder and solder. Solder is a steel rod with a specified material, length (about 400mm), and di

difficulties. 1.3a, 1.3b and 1.3c are shown.1.4 Screw hole metallization, the design of the pad is unreasonable.Screw holes are used to secure the PCB board with screws. In order to prevent excessive wave soldering after plugging, screw hole inside the wall does not allow copper foil, over the crest surface of the screw hole pads need to be designed to "m" or plum-shaped (if the wave soldering using the carrier, may not exist above problems). 1.4A and 1.4b are shown.1.5 PCB

lines to provide us with enough materials, waste utilization is environmentally friendly and save money, but also to meet the fun DIY, if you have a soldering iron on hand, then we can start.Materials and toolsMaterials and toolsWe need to prepare some materials and tools, but don't worry is common, all the tools you need can be found in a Technical home toolkit:soldering iron, low wattage can beFine Lead-free solderA sharp knife.Some electrical tapes and heat shrinkable tubingA standard micro

Meaning of each layer (Source: jq_lin) A. Signal layer (signal layers): The signal layer includes top layer, bottom layer, and mid layer 1 ...... 30. These layers are all layers with electrical connections, that is, the actual copper layer. The middle layer refers to the Middle board layer Used for cabling, where wires are laid.B. inner layer (internal plane): internal plane 1 ...... 16. These layers are generally connected to the ground and power supply, and become the power supply layer and fo

Design engineers must follow the following design specifications: Latest key keepout options: 1) when using PROTEL 99 or dxp software design engineers, be sure not to check the keepout option in online attribute options regardless of the layer when drawing the wire, once the keepout option is selected, this line cannot be made (as long as this option is selected, this line is disabled ), I. Most common errors related to engineer design: 1) character design: the width of the silkscreen in the ci

, which are actually part of PCB wiring. During normal connection, we insert the golden finger on one PCB into the appropriate slot (usually called expansion slot) on the other PCB ). In a computer, such as a display card, sound card, or other similar interfaces, they are all connected to the motherboard through a golden finger.The green or brown color on the PCB is the Solder Mask color. This layer is an insulating protective layer that can protect c