Re: [PEDA] Printed Gerber, Shape of SMDpad and silk circle
A note on the etiology of the Protel Octagonal pad mess: The original Gerber specification for octagonal pads was somewhat ambiguous. It appears that the Protel programmers didn't realize the ambiguity and nail it down, an easy mistake to make. Anyway, when the specification was rewritten to remove the ambiguity, it was not the way Protel had interpreted it. The ambiguity was the definition of zero rotation for a polygon: Is it point up or flat up? As I recall, I'm not looking at the spec, zero rotation is defined point up (or down, I don't recall). The result is that Protel octagons are 22.5 degrees off. The Gerber specification is counter-intuitive for anyone accustomed to working with pads! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] Printed Gerber, Shape of SMDpad and silk circle
At 08:46 03.12.2003 +0200, you wrote: Hi Group! I just printed gerbers from Protel99SE and looked then with CamTastic. Pictures in Silk-Pad_Pictures.zip at http://groups.yahoo.com/group/protel-users/files/junk/ tells you what I saw. How should I set my settings in Cam Manager (in Protel99SE) to get correct shapes of SMD pads and SILK circles? I suppose you have the option software arcs enable in the gerber generation. Turn it off if you really bothered about it. But be aware, there may come some zero radius arcs into the gerbers. As for the pads, protel can't draw with an octagonal aperture, so it replaces it with a round aperture. Anyway, avoid octagonal pads!! There is (or was??) a problem with the rotation of octagonal apertures. Protel doesn't follows the gerber specifications. Serch in the archives for octagonal pads, there was a discussion some time ago. Edi Im Hof Sincerely, Bitboys Oy Juha Pajunen, Hw Engineer + IH electronic+ Phone: ++41 52 320 90 00 + + Edi Im Hof + Fax: ++41 52 320 90 04 + + Doernlerstrasse 1, Sulz + URL: http://www.ihe.ch + + CH-8544 Rickenbach-Attikon + E-Mail: [EMAIL PROTECTED] + + Switzerland + + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] Printed Gerber, Shape of SMDpad and silk circle
Yes I have 'software arcs' selected.
I remember, that I have tried to generate gerbers without shecking
that box ('software arcs' NOT selected) and the result was the same!
-Original Message-
From: Richard Sumner [mailto:[EMAIL PROTECTED]
Sent: 6. joulukuuta 2003 16:46
To: Protel EDA Forum
Subject: Re: [PEDA] Printed Gerber, Shape of SMDpad and silk circle
The acute angle where the track joins the pad is a no-no. It will likely
not etch correctly.
When you generate the gerbers, do you have 'software arcs' selected?
Richard
. At 01:46 AM 12/3/2003, you wrote:
Hi Group!
I just printed gerbers from Protel99SE and looked then with
CamTastic. Pictures in Silk-Pad_Pictures.zip at
http://groups.yahoo.com/group/protel-users/files/junk/
tells you what I saw.
How should I set my settings in Cam Manager (in Protel99SE)
to get correct shapes of SMD pads and SILK circles?
Sincerely,
Bitboys Oy
Juha Pajunen, Hw Engineer
Cheesecote Mountain CAMAC, 24 Halley Drive; Pomona, NY 10970
voice: 845 364 0211, fax: 845 362 6947, www.cmcamac.com
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Re: [PEDA] Printed Gerber, Shape of SMDpad and silk circle
At 14/11/2003 11:42, Juha Pajunen wrote: Hi Group! I just printed gerbers from Protel99SE and looked then with CamTastic. Pictures in Silk-Pad_Pictures.zip at http://groups.yahoo.com/group/protel-users/files/junk/ tells you what I saw. How should I set my settings in Cam Manager (in Protel99SE) to get correct shapes of SMD pads and SILK circles? Sincerely, Bitboys Oy Juha Pajunen, Hw Engineer Well Juha, to be frank: you can't. At least not for the pads. Although Protel offers the octagonal pad shape it cannot produce it in Gerber. For my first projects I too wanted octagonal pads (used them all the time in DOS-based Tango) but the only way I found to actually produce Gerbers with them is rather laborious: 1) load the Protel Gerbers (all of them) into CamTastic 2) edit the pads into octagonal ones 3) save the result and send that to the fabhouse. A whole lot of work with plenty of room for error, all for IMO a mostly cosmetic improvement Since then I completely abandoned the octagons and stick to rectangles and ovals. Even the hexagon-shaped circle on the silkscreen might be caused by the use of octagon pads, I have seen stranger things happen in Protel. But then again, I'm just guessing on this one. To quote an unknown philosopher: The truth will set you free. But first, it's going to piss you off. Take care, Leo Potjewijd hardware designer IE Keyprocessor bv. [EMAIL PROTECTED] +31 20 4620700 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
[PEDA] Printed Gerber, Shape of SMDpad and silk circle
Hi Group! I just printed gerbers from Protel99SE and looked then with CamTastic. Pictures in Silk-Pad_Pictures.zip at http://groups.yahoo.com/group/protel-users/files/junk/ tells you what I saw. How should I set my settings in Cam Manager (in Protel99SE) to get correct shapes of SMD pads and SILK circles? Sincerely, Bitboys Oy Juha Pajunen, Hw Engineer * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
[PEDA] Printed Gerber, Shape of SMDpad and silk circle
Hi Group! I just printed gerbers from Protel99SE and looked then with CamTastic. Pictures in Silk-Pad_Pictures.zip at http://groups.yahoo.com/group/protel-users/files/junk/ tells you what I saw. How should I set my settings in Cam Manager (in Protel99SE) to get correct shapes of SMD pads and SILK circles? Sincerely, Bitboys Oy Juha Pajunen, Hw Engineer * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
