From 84eabe34927a167e71a3c55a0abca280763655fc Mon Sep 17 00:00:00 2001 From: Andrew de Quincey Date: Sat, 1 May 2021 09:58:06 +0100 Subject: [PATCH] some more doc udates --- docs/ziegler_tuning.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/docs/ziegler_tuning.md b/docs/ziegler_tuning.md index 6f7b7a0..297f418 100644 --- a/docs/ziegler_tuning.md +++ b/docs/ziegler_tuning.md @@ -15,6 +15,10 @@ One issue with Ziegler Nicols is that is a **heuristic**: it generally works qui Ensure `kiln-controller` is **stopped** during profile recording: The profile must be recorded without any interference from the actual PID control loop (you also don't want two things changing the same GPIOs at the same time!) +Make sure your kiln is completely cool - we need to record the data starting from room temperature to correctly measure the effect of kiln/heating. + +There needs to be no other source of temperature change to the kiln: eg if you normally run with a kiln plug in place - makae sure its in place for the test! + To record the profile, run: ``` python kiln-tuner.py zn.csv