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 Track to oval pad, jumping to centre !

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T O P I C    R E V I E W
digitaldreams Posted - 21 Sep 2009 : 15:20:55
Hi everyone !

When adding a track that approaches an oval pad at say 45deg I often end the track at the edge of the pad, yet the system snaps the track to the centre hence changing the angle of the incoming track !. I notice that the center of the pad (hole) lights up as I locate at the edge...

How do I stop this ??. My issue is not related to the grid 'snap'

13.0.2

Regards
12   L A T E S T    R E P L I E S    (Newest First)
Iain Wilkie Posted - 20 Oct 2015 : 19:37:44
Ed,

True about dangling track .... but not connectivity as the connection is still maintained, I use this a lot with some SM pads that I want to "Hang" from a power track rail rather than sit right on it. If there is a valid connection at either end of the track then the dangling track error will dis-appear. Otherwise you can accept the dangling track error.

Iain
edrees Posted - 20 Oct 2015 : 09:27:40
But Iain, this gives you dangling track /connectivity errors with DRC.
Iain Wilkie Posted - 19 Oct 2015 : 20:40:10
There is another approach. Instead of drawing the track to the pad, simply draw the track first and them move the pad to touch it.

Simples !

Iain
n/a Posted - 19 Oct 2015 : 19:19:31
Hi Edrees,

Yes, that does work and I think it's definitely better than my method. It still would be quicker to be able to uncheck a box that sends the track to the center because it still requires some editing when I want to continue on with the trace past the pad. I think some of the things that seem like time consuming workarounds for me are really just minor annoyances to people who are more proficient with the software. This is only a small portion of my job so it's taken me quite awhile to become familiar with it.
edrees Posted - 16 Oct 2015 : 15:52:29
Hi Mark,

Am I missing something here?

Why not allow the track to snap to the centre of the pad and then edit the last segment of track by adding a track node within the pad? That way you can at least get the appearance that the track does not terminate at the pad centre.
n/a Posted - 16 Oct 2015 : 15:22:12
I know this is an old thread but I have the same issue as digitaldreams. Many times in my designs I do not want the track to snap to the middle of the pad. It seems there should be a check box to turn off this feature (I can see it's usefulness), but I have yet to find it. I have to spend a lot of time on workarounds. What I typically do is note the pad coordinates and move it out of the way. Then place my track where it needs to go, then move the pad back.
digitaldreams Posted - 28 Sep 2009 : 20:31:10
LOL

I think we need an update here !. A little programming intelligence is needed when joining a track to an oval pad !

Regards

DigitalDreams...
Easy-PC 13.0.3
Peter Johnson Posted - 28 Sep 2009 : 10:36:03
Try this. As you're adding the track, you can use the hot key <M> to cycle through all the available angle snap options, so it's slow but easy to select the mitre mode (9 key presses for the full cycle!). As you approach the pad, stop so that you just need an angled bit then a straight bit to get you to the pad centre (yes, it will ALWAYS go to the centre). If you can't get close enough, use <H> to pop up the snap menu and choose a finer grid. As you place the cursor on the pad centre, if it's giving you a straight section before the angle, use <F> to flip the track so the angle comes first.

That should give the impression of an offset end by burying a short straight section within the pad. HTH.
digitaldreams Posted - 25 Sep 2009 : 11:16:11
Thanks Olga

Had a go, yet no better. As soon as the track end approaches the oval, the center of the pad lights up & I'm doomed...

Regards

DigitalDreams...
Easy-PC 13.0.3
olga Posted - 23 Sep 2009 : 11:27:05
Hi Digital,

Have you tried setting the segment mode to mitre and seeing if this helps your problem?

You can send a link to an image (uploaded to somewhere like photobucket), but you can't embed one in the forum, unfortunately.

Best wishes,
Olga.
digitaldreams Posted - 22 Sep 2009 : 12:47:32
Hi Olga....

Segment mode is 'free'. I have no problem starting a track from an oval pad....yet no end of trouble ending on one. I know I can edit the track afterwards - but for almost every track !, this does not always work as hoped either. A work around is to create two tracks (hence two starts from pads) and join them in the middle, yet not ideal.

Can I embed images in this forum to make the issue clearer ?

Regards

Easy-PC 13.0.2
olga Posted - 22 Sep 2009 : 09:21:25
Hi Digital,

The track will always snap to the centre of the pad. It always has done as far as I know!

As for this changing the angle of your track; do you have the PCB tracks segment mode (in Preferences) set to Free? If you want to constrain tracks to 45 degrees you should set this to Mitre.

When you've done this; if the track still does not exit the pad where you want it to, you can edit the track by hand.

As for the hole lighting up when you're near the edge of the pad, this is the 'Finish markers' setting in the Display menu. This shows if you're near the centre of the pad, or if you're exactly on the centre. You can turn these off completely if you don't need them.

Hope this helps,
Best wishes,
Olga.