How Allegro imports pictures such as high-definition logo, QR code, anti-static logo and Chinese characters

In the design PCB when , We often need to add companies to the screen printing layer Logo, QR code 、 Some signs or Chinese characters . At this time , If you use Allegro Self contained import Logo The function of , You will find that the effect of the generated silk screen graphics is poor , So how to generate high-definition silk screen graphics , This article will introduce the detailed operation method .

Preface ——Allegro Self contained import Logo Poor function graphics

newly build Format Symbol, You can import bmp Format pictures as Logo, Then construct a shape to turn the shape into a fill Shape.

The final 3D effect ：

The import effect is general , The edges of silk screen graphics will have serrations 、 Notch or groove , It's more obvious when you zoom in , Obviously this is not HD , The method described below can get HD screen printing with smooth edges .

One . png,jpg Equiturn SVG

SVG,Scalable Vector Graphics, Scalable vector graphics , It is based on XML Picture format for , in other words SVG A graphic in format is actually a piece of code , You can modify it directly through the text editor .SVG Its biggest feature is that all the images it displays are through mathematical formulas （ Like a circle 、 A straight line ） And so on , Therefore, the image in this format is still clear when zoomed in or out at will . Please refer to ：SVG Format _ Baidu Encyclopedia (baidu.com)

I'm using Online conversion , Tried many free online conversion websites , I think it's best to use ：

1. Convertio — File converter , This site 24 Free conversion within hours 10 minute , And there is no need to log in , And provide SVG turn DXF The function of

2. PNG turn SVG – Online will PNG Convert document to SVG (png2svg.com), This website seems to be free all the time , Similarly, there is no need to log in

I found it online TI The company's png Format Logo For example . Be careful , The higher the picture pixel, the better , The higher the pixel , Got SVG The more refined .

png：

SVG：

Be careful ： Picture turn SVG Is the most critical step in the whole process ,SVG The image effect can be considered as the final screen printing effect . therefore , If SVG The conversion effect of is not good , Details lost , You may need a higher pixel source image , Or a more powerful conversion tool / Website .

Two . SVG turn DXF

DXF,Drawing Interchange Format, Drawing exchange file , It and SVG equally , Is a vector graphics file , It can also be opened and edited through a text editor , therefore SVG turn DXF It can be regarded as the transformation of code syntax , No loss of image details .

I use online SVG turn DXF, The following two websites are good ：

1. SVG Turn DXF Converter . Online freedom — Convertio
2. SVG to DXF | CloudConvert

use AutoCAD Open the converted DXF file , As shown in the figure below , The details of the visible image are still clear .

3、 ... and . newly build Format Symbol, Import DXF

Format symbol yes Allegro Dedicated to Logo, File format of standard objects such as signs , of Allegro There are many kinds of symbol（ Include Package, Mechanical etc. ） The difference between , Please search by yourself .

open Allegro -> file -> newly build -> choice Format symbol

You can create a new Format Symbol As a template , After the Format You can copy this , Operate on this basis .

open TI_Logo.dra -> file -> Import -> DXF

About importing DXF Operation details of , Please refer to my other blog ：Allegro How to import and export DXF_ Xu Xiaokang's blog blog -CSDN Blog _allegro export dxf Which layers are generally reserved

Four . Change the line width of silk screen , Build shapes , Zoom in and out and see the final 3D effect

In the previous step, import DXF after , Sometimes because the board frame is too large to see the silk screen graphics , At this point you can see -> Suitable for interface , You can see the silk screen .

4.1 Shrink the silk screen graphics to the appropriate size

Pay attention to measuring the size of silk screen , The silk screen graphics can be reduced to the appropriate size by the following operations ： Size / draft -> Create Detail -> Select the top layer of board silk screen -> Set the scale factor ,2 It means magnifying to the principle 2 times ,0.1 Is reduced to one tenth of the original -> Frame the graph -> place

4.2 Explode shapes , Unfilled Shape Turn line perhaps Construction shape , Unfilled Shape Refill Shape

Graphics are one by one Shape, Even if you zoom in many times, there is no sawtooth , The lines are still smooth . however , this Shape Not at all filled Shape That is, it is not filled Shape, So in fact, the final screen printing effect is a line , The default screen printing line width is 0, So check directly at this time 3D, You can't see any silk screen graphics , So we first adjust the line width of silk screen according to the size of silk screen , Generally speaking , The minimum line width is 0.15mm, Finer silk screen lines may cause processing difficulties , It's not necessary .

The original figure cannot directly select lines , It needs to be deflated once （ No filling after shrinking Shape It turns into a line ） perhaps Directly decompose shapes , Conduct shape -> Explode shapes -> Set the top-level screen printing of the board in the options , And check to delete the shape after decomposition -> Frame the graph -> complete

You can change the line width of the drawing after zooming or decomposing the shape ： Frame the graph , Right click -> Line -> Change width -> Enter the desired line width -> determine

then , change SilkScreen Top Its color is white , see 3D, Press the keypad 8 Show Top, The final screen printing graphic effect is as follows ：

so , Silk screen graphics are composed of lines , If you don't like this style , Want to fill Shape What shall I do? , Then it is the opposite of the decomposition shape , You need to build shapes . shape -> Build shapes -> In options , Change the effective class to the top layer of board silk screen -> Frame the graph -> wait for 10 second ~ A few minutes （ The amount of calculation of building shape is large , Time consumption depends on the complexity of graphics and computer performance ）-> complete

see 3D, It is shown as follows ：

There are two effects of lines and filled shapes , Use whatever you like .

4.3 Change the origin position and paper size , Make the drawings match the silk screen graphics

Change the origin position and paper size ( Set up -> Design parameters -> Design ), Make the drawing match the image , Avoid this symbol The drawing is too large , Lead to in brd Import this symbol when , beyond brd Drawing scope , Make a mistake .

5、 ... and . Set up Format Symbol Library path for , stay brd Direct use in documents Format Symbol

Format Symbol For two files *.dra + *.osm, To be in brd Call this component in the file , Need to set up Format Symbol Library path for , And put these two files under the library path .

Set up -> User preferences -> Search for psm -> Set up psmpath -> determine

stay brd File directly call Format Symbol, place -> Manual -> Advanced settings , Check Library -> In the layout list , choice Format Symbol, Select what to place Symbol.

On the final board 3D effect ：

6、 ... and . Other image displays

6.1 My blog logo

6.2 Anti static signs

6.3 My blog QR code

Forage QR code generator (cli.im)

Ordinary QR code graphics are too complex , Cannot be converted to silk screen , It needs to be changed , Click style beautification .

Change the code point type of QR code to fillet stripe or grid with simple image , Download again png picture .

Then follow the above steps to SVG, Re turn DXF, Then import DXF, Get the following silk screen image ：

The scanning response is fast , You can try it .

7、 ... and . Import Chinese characters

If there are special requirements for Chinese characters , You can generate artistic characters online , Then carry out the above steps to get the silk screen map of Chinese characters . If there are no special requirements , have access to skill Import Chinese character function of tool circuit wizard ：

Support all kinds of fonts and font sizes in the computer . The effect is as follows ：

in addition , this skill It also supports importing pictures , And support jpg,png,ico,bmp And so on , But the graphic effect is not good .

Circuit wizard is a completely free skill Tools , Download address ： Circuit wizard (tech-gyro.com), Later, I may write a blog to introduce various practical functions of the circuit wizard , Coming soon .

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