Qestion to DC-Sweep...what is wrong?

[Kicadusch]

Hello together,

What’s wrong with my DC sweep setting? It should go from 0 to 6V in 1V increments, but as you can see here, that’s not what’s happening.
Application: KiCad Schematic Editor x86_64 on x86_64

Version: 9.0.2+dfsg-1, release build

Libraries:
wxWidgets 3.2.8
FreeType 2.13.3
HarfBuzz 10.2.0
FontConfig 2.15.0
libcurl/8.14.1 OpenSSL/3.5.1 zlib/1.3.1 brotli/1.1.0 zstd/1.5.7 libidn2/2.3.8 libpsl/0.21.2 libssh2/1.11.1 nghttp2/1.64.0 nghttp3/1.8.0 librtmp/2.3 OpenLDAP/2.6.10

Platform: Debian GNU/Linux 13 (trixie), 64 bit, Little endian, wxGTK, X11, lightdm-xsession, x11
OpenGL: Mesa, llvmpipe (LLVM 19.1.7, 256 bits), 4.5 (Compatibility Profile) Mesa 25.0.7-2

Build Info:
Date: May 10 2025 09:34:36
wxWidgets: 3.2.8 (wchar_t,wx containers) GTK+ 3.24
Boost: 1.83.0
OCC: 7.8.1
Curl: 8.13.0
ngspice: 44.2
Compiler: GCC 14.2.0 with C++ ABI 1019
KICAD_IPC_API=ON

Locale:
Lang: de_DE
Enc: UTF-8
Num: 1.234,5
Encoded кΩ丈: D0BACEA9E4B888 (sys), D0BACEA9E4B888 (utf8)

[gkeeth]

For some reason you’re looking at a transient simulation and not a DC sim.

I set up a similar sim in 9.0.6 and got this:

[Kicadusch]

hello gkeeth,
I’ve now changed it a bit and it works. I want to test Zener diode models this way, and I’ll try it like this first. Thanks anyway for your answer, and here’s my solution.

[paulvdh]

Also, do note that the earlier transient analysis has time on it’s horizontal axis, while the DC analysis has voltage on the horizontal axis. This is a quite fundamental difference. I would prefer to use transient analysis here, and combine it with a voltage source that ramps up it’s output. (for example with a PWL source). This way you can also simulate the result of added smoothing capacitors, or (rectified) input from an AC source.