At 02:35 PM 5/20/2002 +0500, Waheed Bajwa wrote: >Whats a polygon good for?
For filling an area of a PCB with copper. Also called a "copper pour." Properly set up, the inside of the polygon will fill with copper (track) except for clearances as determined by the appropriate design rules around pads, via, and other primitives not belonging to the same net as the polygon. > Also what are Gerber, NC Drill and Pick and Place files (CAM) Gerber: standard file format for photoplots. Gerber was originally devised to control mechanical photoplotters that drew with light by moving an aperture (an opening for light to pass through) over a film (actually, the film was usually moved, not the aperture, same difference; conceptually it was the aperture that was used to draw.). The original gerber used a separate aperture list; the early plotters only had relatively few apertures on a wheel. RS-274X gerber added more sophisticated commands and features, the most notable of which is embedded apertures, so that no extra aperture table is necessary. Protel will generate one anyway.... NC Drill: This is a file with tool (drill) sizes and positions, for controlling a Numerically Controlled drilling machine. The format is called Excellon from one of the manufacturers. There are also other formats. Pick and Place: A file with the position of all components and their rotations, for use with automated assembly (pick-and-place) machines. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *