Trapeziodal pads are buggy
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
KiCad |
Fix Released
|
Undecided
|
jean-pierre charras |
Bug Description
I've found a couple of problems with trapezoidal pads that have resulted in significant problems routing a board.
Firstly the DRC outline is not the same shape as the pad, so sometimes the minimum allowable distance to the pad is greater than the track spacing dimension (clearance), and sometimes it's less. Both make tracking problematic. The attachment shows (top) some random pads in the module editor and (bottom) a SOT89 in PCBNew (clearance set to 0.1956mm, grid to 0.01mm).
Secondly trapezoidal pads in designs exported to Freerouter get imported as ovals, which being a completely different shape result in Freerouter being unable to route the board. That may be a bug in Freerouter, of course, but I have no means of knowing where the bug lies.
PCBNew (2010-05-05 BZR 2356)-stable / XP Pro SP3.
Changed in kicad: | |
status: | Confirmed → In Progress |
assignee: | nobody → jean-pierre charras (jp-charras) |
Changed in kicad: | |
status: | Fix Committed → Fix Released |
On Tue, 7 Sep 2010, Robert wrote:
> being unable to route the board. That may be a bug in Freerouter, of
> course, but I have no means of knowing where the bug lies.
I think that freerouter doesn't support trapezoidal pads (or maybe it's
the underlying DSN file which can't handle them). Anyway I checked and
they're exported as round.
--
Lorenzo Marcantonio
Logos Srl