Question About Pad Place Round-off

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   Dear all,There is something I definitely do not understand with PCB Library E. Lite.  I use the 2017.14 release.

When generating a Chip capacitor 0603 for instance, In Terminal/Settings I have 0.01 set for both Pad Place Round-Off and Pad Size Round-Off.
Generated pads are 0.93x0.82mm which are fine.
But X position is ±0.755 meaning a 0.005 increment instead of being rounded to 0.76 or 0.75?!

Is it a bug or some other setting having higher priority??
Thanks,

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nicolasr Members Profile Send Private Message Find Members Posts Add to Buddy List New User Joined: 10 May 2017 Status: Offline Points: 4	Post Options Post Reply Quote nicolasr Report Post Thanks(0) Quote Reply Topic: Question About Pad Place Round-off Posted: 21 Jun 2017 at 1:56am
	Dear all, There is something I definitely do not understand with PCB Library E. Lite. I use the 2017.14 release. When generating a Chip capacitor 0603 for instance, In Terminal/Settings I have 0.01 set for both Pad Place Round-Off and Pad Size Round-Off. Generated pads are 0.93x0.82mm which are fine. But X position is ±0.755 meaning a 0.005 increment instead of being rounded to 0.76 or 0.75?! Is it a bug or some other setting having higher priority?? Thanks,



Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5716	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 21 Jun 2017 at 8:32am
	I believe the pad place round-off is the spacing between the pads. For example on an 0603 capacitor the space between pin 1 & 2 are rounded to 0.01 increments. Not the distance from the origin to the pin. Try using a 0.02 pad place round-off and you'll get 0.01 rounding from the origin to the pin.
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nicolasr Members Profile Send Private Message Find Members Posts Add to Buddy List New User Joined: 10 May 2017 Status: Offline Points: 4	Post Options Post Reply Quote nicolasr Report Post Thanks(0) Quote Reply Posted: 22 Jun 2017 at 6:37am
	Oh, didn't see it this way... shame on me! Sometimes the simpler the better. Thanks!

nicolasr Members Profile Send Private Message Find Members Posts Add to Buddy List New User Joined: 10 May 2017 Status: Offline Points: 4	Post Options Post Reply Quote nicolasr Report Post Thanks(0) Quote Reply Posted: 23 Jun 2017 at 1:48am
	Additional question, what how would you do to round off to 0.01 when it is given as pitch (for instance, SOT23 or SOD...) A pitch of 0.65 gives pads placement at 0.325... despite pad placement round off at 0.02!

Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5716	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 23 Jun 2017 at 7:36am
	Pad place round-off is only in 1 direction, the Lead Span pads. The pitch is always the pitch and there is absolutely no rounding on the pin pitch. The pitch has to be 100% accurate.
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