Protel 99se set design origin to absolute

#Protel 99se set design origin to absolute manual

When the simple layout is complete, use automatic alignment to expand or contract a group of similarly packaged components neatly. Using the automatic selection method, you can quickly collect similarly packaged components, and then rotate, unfold, and organize them into groups, which can be moved to the desired position on the board. New interactive layout options include automatic selection and automatic alignment. Protel99 has added some new skills in layout. Select a component with the mouse, hold down the left button of the mouse, drag the component to the destination, release the left button, and fix the component.

#Protel 99se set design origin to absolute manual

The key to wiring is layout, and most designers use manual layout.

For automatic layout, run 'Auto Place' under 'Tools', With this command, you need to be patient. Fifth, the placement of parts packaging, also known as parts layout Protel99 can be automated layout, you can also perform manual layout. Of course, you can manually generate the netlist in the PCB and specify the part package.

When introducing the netlist, the packaging of parts can be modified or supplemented according to the design.

Therefore, in the schematic design, the packaging of parts may be forgotten. In the process of schematic design, ERC inspection will not involve the packaging of parts. The interface can only be wired after the netlist is loaded. The netlist is the soul of PCB automatic wiring, and it is also the design of schematic design and impression circuit board. After opening all the PCB library files to be used, the step of importing the netlist file and modifying the part package is a very important step. Note: Before drawing the border of the circuit board, be sure to set the current layer to Keep Out layer, that is, the wiring layer is prohibited. The 5mm ID pads can be loaded from other boards or PCB izard for standard boards. For 3mm screws, 6.5 ~ 8mm outer diameter and 3.2 ~ 3 are available. Place pads of appropriate size where the fixing holes need to be placed. Planning the circuit board is mainly to determine the border of the circuit board, including the size of the circuit board and so on. Most of the parameters can use the system default values, and after these parameters are set, they conform to personal habits, and there is no need to modify them later. The first step after entering the PCB system is to set the PCB design environment, including setting the grid size and type, cursor type, layout parameters, wiring Parameters, etc. Third, set the PCB design environment and draw the printed circuit board frame with hollows in the middle, etc. Draw the package library of the non-standard device defined by yourself It is recommended to put all the devices you draw into a special design file of the PCB library you have created. Some schematic diagrams and the names of the devices in the PCB package library whose pin names are inconsistent are changed to the same ones in the PCB package library, especially diodes and transistors. Any physical connection can be defined to ground or protective ground. Manually change the network table to define the pads that are not on the schematic diagram of some components such as the fixing pins to the network that communicates with it. In the PCB design system, you can directly take parts for packaging Generate a netlist. Of course, in some special cases, such as the circuit board is relatively simple, if you already have a network table, you can directly enter the PCB design system without designing the schematic. Use the schematic design tool to draw the schematic diagram and generate the corresponding network table. The preliminary work of the circuit board design 1.