| T O P I C R E V I E W |
| olga |
Posted - 13 May 2009 : 14:42:19
Hi,
Would it be possible to have vias snap to the centre of the track they're on the end of when they're placed? That way, vias aren't off at an angle, which requires changing to a finer grid -snap to put them right!
Best wishes,
Olga. |
| 6 L A T E S T R E P L I E S (Newest First) |
| olga |
Posted - 29 Jun 2009 : 11:24:52
Thanks Ray,
That does sound like it would work, but as you say is a lot of extra work.
Usually what I do is zoom right in, change the grid step to 40th and place the via by hand. It works well enough & is possibly a bit easier than your method.
Best wishes,
Olga. |
| rbuck |
Posted - 26 Jun 2009 : 01:27:36
One thing I do (which is extra work) is place a pad (not a via) right outside the part. Then right-click the pad for the part and select properties. Depending on part orientation, note the X or Y properties and click cancel. Then right click the pad that you placed outside of the part and change its X or Y properties to match that of the part that you noted before. Now you can route from the part and it will snap to the pad center (which is the same as the part pad center). The next segment leaving the pad will snap to the normal grid.
After the track is routed you can right-click the pad, choose disconnect from net, and delete the pad. If you are actually using the pad to connect to say ground, you can select Free Pad to Via and change the net to whatever your ground net is.
You may already do this and if it were added as a feature it would save the additional steps.
Ray |
| olga |
Posted - 27 May 2009 : 14:43:43
Thank you!  |
| Peter Johnson |
Posted - 26 May 2009 : 12:56:07
OK, that makes sense. I've added it as a suggestion. |
| olga |
Posted - 22 May 2009 : 16:33:45
Hi Peter,
Firstly, I'm making the assumption that this is a short track, for instance out of a SMT pad for a ground connection, where all you want is the via to be in line with the centre of the pad.
Frequently, even when a part is placed on-grid, the pads may be off the grid, (due to the miniscule nature of the parts these days!); so that means that when a track is placed from the middle of a pad, the initial part of the track is aligned with the pad, but the next segment of the track is snapping to the grid, which puts the via on-grid, but not in line with the pad.
I hope this is clearer... Apologies if it's not, it is Friday afternoon, after all  |
| Peter Johnson |
Posted - 20 May 2009 : 13:25:16
I'd like to discuss this. If the track and via are on grid, why would they not align? Alternatively, if the via is on a coarser grid than the track, is it desirable to have the via move off the coarser grid in terms of maintaining clearance to adjacent tracks.
I can think of a number of instances when a via is deliberately offset slightly from the end of a track for clearance purposes. I'm not convinced that it's a good idea to have this alignment happen automatically. |
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