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Draftsman is the new functionality being introduced in Altium Designer 16.1. It takes the effort out of creating PCB documentation by automating the creation of tables, PCB design views, layer legend, and details. The drawing document is linked to the source PCB document so they are always accurate and in synch
The evolution of the PCB documentation design process has progressed considerably since the days of light tables, tape and Mylar. The 80s introduced the first PCB design software, marking a new era in design-authoring capability and technology. Since then there has been a rise, fall, and consolidation of EDA companies; but one thing that has remained constant is the advancement of technologies that aid designers in the progressive challenges of PCB design.
The projection of Moore’s Law has remained true, creating an ever-cascading set of new technologies and requirements. As designers, we have a love/hate relationship with the surging design constraints related to increasing frequencies, component densities, part sourcing and manufacturing cost. Design deadlines have forced us to unionize our EDA requests and demand new functionality for the next faster, better thing. Based on our desires, EDA companies produced next-generation features in auto routing, high-speed routing, constraint management, component information systems, design reuse, and the list goes on. All this new functionality enabled PCB designers to capture logic and create layouts in lightning fashion, but has left some obvious, time-consuming tasks like documentation in the stone ages.
As much as we hate it, Printed Circuit Board PCB design documentation is a necessary evil. It takes what we’ve captured and translates it into a realizable working device. We often forget the amount of time we spend documenting our designs. Just one design can include design fabrication drawing and notes, assembly drawing and process steps, PCB rework instructions, layer stackup information, drill details, Bill of Materials, and more. Every design review and re-spin warrant these documents be recreated reflecting the most recent version of your creation. For a given design, this can easily translate into double-digit documentation sets representing many lost hours that could be better spent on other tasks.
Current methodologies include lackluster drafting tools within the PCB design environment, basic text support, static automation, or external 2D Mechanical CAD solutions optimal for drawing, but lacking any type of connected intelligence.
Draftsman is the new functionality being introduced in Altium Designer 16.1. It takes the effort out of creating PCB documentation by automating the creation of tables, PCB design views, layer legend, and details. The drawing document is linked to the source PCB document so they are always accurate and in synch. Let’s take a look at the simplified and automated user experience that Draftsman provides for creating and maintaining your PCB documentation.
We hate to admit it but we have all spent countless hours constructing beautiful documentation for our designs. I can personally admit to drawing nice layer stack legend detail views using 2D line tools only to have to redraw due to the addition/ change of layers or via stacks. It seems silly to think that the technology that goes into auto routing has not translated into the documentation space - until now.
Altium Designer has a new PCB Drawing document type under File » New. As with all of Altium Designer’s editors Draftsman is integrated and part of the unified design environment. Once the drawing document is created, the menus and toolbars are updated reflecting the editor change to Draftsman – no different than switching from a schematic to a PCB document. In the Draftsman Place menu, an array or standard drawing and dimensioning objects will be presented (Figure 1).
Figure 1. Draftsman placement objects
The placement objects themselves are intuitive and allow the designer to quickly place and arrange based on company requirements and documentation type. Placing any drawing object auto-generates the view based on the source PCB file to which the Draftsman document is linked. Making common document objects available to the designer allows you to quickly create any drawing. See the drill drawing which took less than 2 mins to create (Figure 2).
Figure 2: The beginning of a simple drill drawing
What makes Draftsman unique and where the real magic happens is the data synchronization between the PCB document and the Draftsman document. What does this mean? Consider the following example:
The PCB documentation has already been created for the initial design revision. Your design contains through hole vias that are constricting the BGA breakout channels. Adding blind vias will remove the constriction, allowing for maximum breakout expansion. Also, by adding buried vias, there are areas of the board you can optimize with vertical routing real-estate, allowing you to reduce layer count.
From a drill drawing perspective these changes impact the drill table, layer stack legend, and the design drill view. What was once a painful process is performed automatically since the Printed Circuit Board PCB document (source) is linked to the Draftsman document (target). Once the PCB CAD has bee updated you can open the Draftsman document and synchronize the design data from Tools » Update Board. This automatically updates the drill drawing, eliminating the historic manual recreation process (figure 3 and 4).
Figure 3: Drill drawing before the design change
Because the documents are linked it introduces another benefit of create intelligent design templates. Think about the beauty of creating PCB assembly, drill, and fabrication templates once. Opening a template allows the Draftsman document to be repointed to a different PCB source. The object views you’ve placed are fixed and automatically updated based on the new source information. No need to redraw, replace, or update anything! You could literally get to a point where you have a library of these PCB documentation templates to account for various product families, board shapes, and required fabrication/assembly specifications. This not only automates the creation of PCB Assembly documentation, but ensures consistency and enforces necessary standards.
My father always told me, “You can’t use a wrench as a hammer, a screwdriver as a chisel, or a shovel as a spade.” These words have always resonated, yet as a designer I often find myself using the wrong tool for the job. How many of us have used Visio to capture schematics or AutoCad to do Printed Circuit Board PCB layout and/or documentation? Both tools can get the job done, but because of the lack of electrical intelligence downstream, the side effects that occur when changes arise far outweigh any temporary convenience.
Draftsman brings PCB documentation to the next level, as push and shove did for routing. Its ease of use and intelligent data synchronization makes the headaches of PCB documentation creation and maintenance a thing of the past.