Simulation-only components are designed to help verify designs they are not transferred to board layout. Letters, increasing from A-Z, enumerate the devices within multi-section components. Examples of multi-section devices include logic gates or operational amplifiers. A multi-section component is a component that has multiple gates or devices per chip. Single Section versus Multi-section ComponentsĪ single-section component is any component that has a single device per chip. This footprint can be added to the Multisim database to define a custom component. This landpattern is created manually so as to precisely define the shape, size, and dimensions of a Surface Mount Device (SMD).
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Part 2 of the component creation articles, entitled Creating a Custom Component in NI Ultiboard, outlines how to create a custom Ultiboard landpattern for layout. Multisim also allows users to create simulation-only or layout-only components.
Many components are easier to create and not all steps outlined are required under most circumstances. You will create a part with two schematic symbols, two models, but only one footprint. In the interest of completeness, you will learn how to create an advanced component with two sections. The tutorial steps you through the process of creating a simulation and PCB layout compatible component in Multisim. Mapping the symbol pins to the model pins.Mapping the symbol pins to the footprint pins.Selecting and/or editing the component symbol.Selecting a footprint and the component configuration.Components details include symbol and optionally pin, model, and footprint information. The Component Wizard is the primary tool used to create custom components in Multisim, and it walks you through all of the steps required to create a new component. You will create the component and then verify its operation. The purpose of this tutorial is to explain how you can create your own components for simulation and/or Printed Circuit Board (PCB) layout from within Multisim.
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Also fiducials have to be defined in the program to align with the physical fiducials on the board.Īll materials and programs for the pick & place process are ready now.This tutorial is the first in a series of articles on component creation in NI Multisim and NI Ultiboard. The rule is that the board’s longest side rests on the conveyor, to minimise the bending of the board. The information we need to correctly configure the machine comes from the datasheet of the component, but also experience plays a major role here.įinally we define the board position on the machine. The speed of the mounting head depends on the component’s dimensions, weight and material. When we change reels, again the first 3 components are measured. Not each and every component is measured, for each new reel, the first 3 parts are measured, and when measurements are within tolerances, the complete reel is accepted. Our machine is capable to measure electrical values for resistors, capacitors and diodes, and based on the measured values compared with set values the machine will accept or reject components to be placed. For new entries, we copy most of the data from the PCBA Visualizer database, and enhance this with instructions for the machine.Įxtra information we add is the polarity according to the machine rotation conventions, dimensions of the part and electrical values.
Starting from a BOM file, already prepared for our PCBA Visualizer tools we start this process.Īll parts mounted earlier are available in the machine database and are recognised by their MPN number. The control centre of our Pick & Place machines, called M圜enter has an own database of components with machine-specific instructions for each component to be placed. Starting from a prepared data set, ready PCB’s, stencils and components mounted in feeders, we will now create proper instructions for the Pick & Place machines.