Select “Settings>View Options>View Imported Nets” to turn on External Net View. This will create a flashed pad at each via, which is enough to extract a good netlist. In such cases an alternative would be to copy the drill layer to the top and bottom layers. In some cases, such as with round boards, you might end up with many drawn pads at various rotations. If you have rotated pads or other unusual pads, Draw to Flash>Interactive (and Interactive any angle) is the best way to flash them. Then look around on the layer and make sure your pads are the flash color. To see if you have drawn pads, select Tables>Layers and change the Flash color for your top and bottom layers. While Trace and polygon drawn pads will typically pass a netlist compare, they can lead to false errors in some situations. Netlists only include net points on the top and bottom of the board. With no insulator layer between layers, the connection is broken.įor more info on Layer Sets, see Help under the Contents | CAM Editor topic Tables > Layer Sets.
Do not define it other than to select it in the “thru drill” box in the lower left corner of the dialog.įor MCM Layer Sets, stack them up in order with an insulator layer between each conductive layer. If data has Blind and Buried Drills or it uses MCM technology, use Tables>Layer Sets to define how the data stacks up.įor Blind and Buried, the thru drill layer is assumed.
Cam350 change flash pad color how to#
For info on how to align layers, see help under Contents | CAM Editor, Edit>Layers>Align Setup Layer Sets if Necessary This is true for all electrical layers and drill data. If data is not aligned, you cannot extract a good netlist. Errors as part of either the import dialog, or those visible on screen after import must be dealt with accordingly. To learn how to read an IPC netlist please refer to this Advisory: IPCD356 Simplified Advisory.Īs for the Gerber Files, the only thing that is important is that the data be imported properly. Parts of this article will refer to IPC data and assumes some familiarity. Understanding the IPC format is important to netlist compare, especially if you find errors. This is a common solution of PADS netlist compares. By importing intelligent data info Cam350 you can then export an IPC netlist. The Direct CAD interfaces are found under File>Import>Cad Data. If the CAD system does not export IPC netlists, you may be able to get around this problem by using ODB++ or one of CAM350’s direct CAD interfaces. It is better to get an IPC netlist from the Gerber data source (the CAD system). Thus they cannot be compared without using cam350 to build parts. Using a CAD netlist that is reference designator based is problematic as the netlist you extract from your Gerber data is no referenced designator based. IPC netlists (either IPC-D-356 or IPC-D-356a) are preferable for netlist compare. To discuss such matters, contact support. Such settings vary depending on the CAD program.
If you have control over the generation of the Gerber data, adjustments to the output settings in you CAD program can reduce or eliminate all preparation issues. Being aware of these issues can minimize false errors and lead to a more accurate check. Preparationĭepending on the quality of the data, you many have one or more issues that can alter the results of a netlist compare. Use Utilities>Netlist Extract to a new netlist after edits then run Analysis>Nets>Compare External Nets afterwards to make sure the boards net has not been altered. Just extract a netlist from the Gerber data, make it external with Analysis>Nets >Update External Nets from CAM Nets and then do your edits. Netlist compare can catch mistakes that alter the net. Netlist Compare is also useful when editing a board. So Netlist Compare is the only way to be sure that your Gerber data is electrically correct. DRC measures data to make sure they are within a user defined range.
Netlist Compare is the only way to find opens and shorts in a board.
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