Hello Everyone:
I have a few questions with regard to Protel libraries that I hope some of you will be able to help me with. At our company we have several Protel users, and we have constructed two library databases. We have one database for all our company schematic symbols catergorized into seperate libraries (ie Caps.lib, inductor.lib, IC.lib, resistor.lib, etc.). We have basically the same Database construction for our pcb footprint libraries. In many instances we are using generic symbols and footprints such as "np-cap" for a non polarized capacitor symbol, and "resistor" for a standard resistor symbol. In our footprint libraries we have generic footprints like "0603", "1206", "SO-8" etc. By using generic symbols and footprints it requires the schematic designer to enter all the particular information, ie value, footprint, internal part number (we have our own part numbering system), for each part placed in the schematic drawings. This seems to work fine, but can be prone to error, and some have suggested that we build individual symbols for every individaul part. This would mean every resistor value would be represented by a unique symbol in the library with it's own unique footprint name. This will create hundreds of symbols and footprints which are graphically identical, and I worry that the libraries will become so huge that they will slow down my system when I load the ddb files. Here are my questions for you. 1. How do you set up your libraries ? Do you keep all your parts in one master library database, or do you have several library databases for the different part types ? 2. Do you use generic names for your symbols and footprints, or do you use unique names for each in individual part ? 3. Do you find that as your library sizes increase your system is more taxed and slows down ? 4. How do you regulate the creation and editing of symols and footprints ? Do you have a librarian ? Do you set permissions on your library files? 5. Do you use the grouping function in your schematic symbol libraries, and do you find this works effectively for you ? 6. Do you find it difficult to standarize "SOT-23" symbols and footprints, since every manufacturer labels the pins differently ? 7. Do you hope "DXP" will be out soon ? Thanks for your time and help in this matter. Daniel Webster PCB Designer Northern Airborne Technology Phone: 250-763-2329 ext. 225 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
