At 09:46 AM 10/4/2002 +1000, Hugh Stevenson wrote: >I am suffereng from a problem that when I place schematic symbols the >Designator and Part Type text is on a 5 grid when my grid is (and always >has been ) set to 10. It only happens sometimes. Does anyone know the >secret to avaoiding it?
The position of designator (and other enabled) text is automatically determined by Protel for initial placement. Sometimes the position is inherited from another symbol, but that would beg the question. I have not investigated the cause, but, as was Mr. Wilson, I am familiar with the issue, though I have not compared designator location with symbol extents. Symbol extents (the maximum and minimum X,Y coordinate for all primitives in the component) may or may not include the width of the outside primitives. However, the center of extents, regardless, can easily be on the half grid if the width of the outside primitives is irrelevant or is, say the grid size, or if primitive width is irrelevant. Primitive width *is* relevant with PCB, but it might not be with Schematic. So if features or full extent are on a 10 mil grid, and default line width is 10 mils, the calculated position of the midpoint will be on a 10 mil grid with the full width is an even multiple of 10 mils, and on a 5 mil grid if the full width is an odd multiple of 10 mils. Because symbols might even be designed on a 1 mil grid, or they might have features with full extents not on a 10 mil grid, the calculated midpoint may be on any grid, it will not be restricted to 5 or 10 mils. Abd ul-Rahman Lomax LOMAX DESIGN ASSOCIATES PCB design, consulting, and training Protel EDA license resales Easthampton, Massachusetts, USA (413) 527-3881, efax (419) 730-4777 www.lomaxdesign.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
