I assume you are trying to use arcs for corners on circuit traces. I had this problem with Protel 98 and with Protel 99. It even got worse for me. My arcs would be fine in PCB, and a few minutes later they would be changed, for no apparent reason! Even 180 degree arcs would frequently reverse direction. You might want to check the PCB file again just to make sure.
I never did find a solution to this, and worked with Altium for weeks to no avail. I finally quit trying to use arcs and instead created "psuedo arcs" Msw out of straight line segments. I saved these in my library file and just pasted them into the PCB when needed. As for the Gerbers PentaLogix makes a good free Gerber viewer called Viewmate (www.pentalogix.com). You can insert each Gerber file into a separate "layer" in the viewer. Then you can turn each layer on or off and check the routing, placement, etc. It doen not automatically check for errors of course, but you should be able to spot the 270 deegree arcs. Bob Butcher [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Leo Potjewijd Sent: Monday, September 19, 2005 5:31 AM To: [email protected] Subject: [PEDA] arcs in Gerber go the wrong way On the PCB (P99SE) all my arcs look great, even on the print preview. But in the Gerber files some, not all, are wrong: the start and end in the right places, but go the wrong way around. So a 90 degree turn ends up as a 270 degree turn with another center and shorts stuff...... It happened once before, but the fab house detected and reported that error so they could correct it in time. Like now, I could not identify the source of the problem and have no clue whatsoever.... I checked the PCB at ASCII level but could not find any indications what went wrong (a 'good' one looks exactly the same as a 'wrong' one). I even generated the Gerbers from that copy: no luck. Inside the Gerbers I am at a loss: I cannot identify arcs, let alone the right and wrong ones. Has anyone seen this before and found a solution or workaround? Checking the 'software arcs' box is not an option: that messes up the already tight clearances (had a close shave with that one, too)..... Leo Potjewijd hardware designer Integrated Engineering B.V. [EMAIL PROTECTED] +31 20 4620700 ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[email protected] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[email protected] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[email protected] ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[email protected] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[email protected] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[email protected]
