On Sat, Dec 16, 2017 at 10:12 PM, Luke Kenneth Casson Leighton lkcl@lkcl.net wrote:
... yyyyeahhh.... that looks better, doesn't it?
Strong work, Luke! That does indeed look nice.
the left outer track is shuffled forward by... errr.... sqrt(2) / 4 * 5mil the one in from that (HTX2P) doesn't need shuffling as it's right next to the green pair... the right outer one (HTXCN) by 3x that amount the next one in (HTXCP) by 2x that amount the next one in (HTX0N) by 1x that amount HTX0P is right next to the green pair which is dead-straight so doesn't need shuffling
so if i've got this right, the separation gap intra-pair should remain at 5.0 mil, and when all the pairs get close together at the end they should again be exactly 5.0 mil apart even on the 45 degree bending.
whewwww :)
i think that's it (oh, except the step needs adjusting to 15mil not 5mil as it is now). now i have to identify where in the PADS file the rectangle for the keepout area is, add *that* to the parser as well, then do the same maths and create a tethered keepout area. *sigh*...
I'm sorry I didn't fill in more of the geometric considerations. Looks like you have them in hand.
When the step offset is d, then the 45 degree step travel will be sqrt(2.0) * d.
Looks like you have the starting positions parallel which was the intent but I did not specify the mathematics. I didn't know what origin or reference point and direction you would like to use.