I am having a lot of difficulty in trying to route a controlled impedance differential pair. I am trying to make a pair with 14thou wide traces with 20thou spacing, but unfortunately every time I chose to select the custom value and start to route a differential pair, it defaults straight to a pair of 0.2mm wide traces and a spacing of 0.25mm.
I cannot find out how to route the differential pair that I require for my design as it is being reset every time I try to do so.
I was earlier having a different issue regarding differential pairs, so I decided to try out a the latest nightly build, however I am now faced with this issue. Can anyone recommend me a nightly build which is known to work well with differential pairs?
Application: kicad
Version: (6.0.0-rc1-dev-107-gb6934bf54), release build
Libraries:
wxWidgets 3.0.3
libcurl/7.54.1 OpenSSL/1.0.2l zlib/1.2.11 libssh2/1.8.0 nghttp2/1.23.1 librtmp/2.3
Platform: Windows 7 (build 7601, Service Pack 1), 64-bit edition, 64 bit, Little endian, wxMSW
Build Info:
wxWidgets: 3.0.3 (wchar_t,wx containers,compatible with 2.8)
Boost: 1.60.0
OpenCASCADE Community Edition: 6.8.0
Curl: 7.54.1
Compiler: GCC 7.1.0 with C++ ABI 1011
Build settings:
USE_WX_GRAPHICS_CONTEXT=OFF
USE_WX_OVERLAY=OFF
KICAD_SCRIPTING=ON
KICAD_SCRIPTING_MODULES=ON
KICAD_SCRIPTING_WXPYTHON=ON
KICAD_SCRIPTING_ACTION_MENU=ON
BUILD_GITHUB_PLUGIN=ON
KICAD_USE_OCE=ON
KICAD_USE_OCC=OFF
KICAD_SPICE=ON
@Alex, the pre-defined values appear to be working in that build. Go to File > Board Setup > Tracks & Vias and enter your dimensions into one of the Differential Pairs lines. You'll then see it on the router right-mouse-button menu (below Use Custom Values... in the Select Differential Pair Dimensions menu). Select it there and you should be good.