From b2973575329568a45c3eb130baf5bd1e8756bcdc Mon Sep 17 00:00:00 2001
From: Thomas Lambert <t.lambert@uliege.be>
Date: Wed, 26 Oct 2022 15:39:30 +0200
Subject: [PATCH] fix(esc): improve telemetry doc
---
esc/esc_programming.tex | 46 ++++++++++++++++++++++++++---------------
1 file changed, 29 insertions(+), 17 deletions(-)
diff --git a/esc/esc_programming.tex b/esc/esc_programming.tex
index 0cade99..105a165 100644
--- a/esc/esc_programming.tex
+++ b/esc/esc_programming.tex
@@ -95,20 +95,33 @@ being ejected from the housing or being caught up by the motor shaft.
\section{Telemetry}
-The \jetibox can be used as a telemetry system during normal operation of the
-motor. While this should not be used when the model is in the wind
-tunnel\footnote{Not really needed/useful and not enough space to put the
-\jetibox inside the fuselage.}, the telemetry could provide valuable insight
-during the first programming steps of the ESC.
+
+The \jetibox can be used as a telemetry terminal for post-run analysis or even
+during \textit{live} operation of the motor. It is recommended to prefer the
+post-run telemetry rather than the live mode for safety reasons. In principle,
+the live mode should be reserved for initial settings of the ESC on a test
+bench. \textbf{Never do live telemetry on a fully working (flapping) system}.
+
\subsection{Safety procedure}
-The telemetry can be used to get direct measurements on the operating motor.
-\textbf{This is the most dangerous way of operation} as it requires both the
-motor to be running and the operator to stand close to the system. To ensure
-maximal safety, this should be reserved for analysing the motor in isolation on
-a test bench, not integrated in the \MR.
+For post-run analysis, the ESC can be completely disconnected from the Arduino.
+This will ensure that the \jetibox remains in Telemetry mode and the motors will
+not accidentally start.
+
+For post-run mode, the safety procedure is:
+\begin{enumerate}
+ \item Disconnect the ESC from the Arduino completely, or completely unplug the
+ Arduino.
+\end{enumerate}
+
-The following safety procedure should be observed for use in telemetry mode:
+The telemetry can also be used to obtain direct measurements on the operating
+motor. \textbf{This is the most dangerous way of operation} as it requires both
+the motor to be running and the operator to stand close to the system (to read
+the measurements). To ensure maximal safety, this should be reserved for
+analysing the motor in isolation on a test bench, not integrated in the \MR.
+
+The following safety procedure should be observed for use in live mode:
\begin{enumerate}
\item Unmount the motor from the \MR and secure it to a test rig (a vice);
\item Ensure the surroundings are clear of any loose object that may come
@@ -117,8 +130,6 @@ The following safety procedure should be observed for use in telemetry mode:
not aligned with the motor lateral direction.
\end{enumerate}
-It is also possible to plug the \jetibox to the ESC after a run is complete. In
-that case, the last motor run can be recovered and analyzed properly.
\subsection{Telemetry procedure}
To begin a test run using the \jetibox for telemetry:
@@ -127,11 +138,12 @@ To begin a test run using the \jetibox for telemetry:
\item Ensure the safety precautions are all conducted.
\item Connect the \jetibox to the ESC.
\item Turn on the power supply.
- \item Turn on the Arduino.
- \item Operate the motor as usual.
+ \item Turn on the Arduino (\textit{for live mode only}).
+ \item Operate the motor as usual (\textit{for live mode only}).
\end{enumerate}
-The same procedure can be applied for \textit{live} telemetry or after-run
-analysis.
+
+For the post-run telemetry, the two last points are not relevant as the Arduino
+should be unplugged or at least disconnected from the ESC.
\section{ESC settings modifications}
This section concerns the modifications of the ESC settings using the \jetibox.
--
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