(AT) and PID (SV) 50%~80%(200℃ 100~160℃): 2 "At" 2 automatic PID PID MPT PID P(+) +)
Illustrated steps: set the usual temperature, configure as shown, then run fan and heat. Do not open the door or other ops until AT finishes; power loss or extinguishing the AT lamp voids the tune. Two to three AT cycles work better.
AT auto-tune centres on the use temperature (the target or usual working range the equipment must control). Start-up may also consider ambient. Details as follows:
### Core logic: match control parameters to the "use temperature"
AT lets the controller learn the system's thermal behaviour at the real working temperature (inertia, heat-up/cool-down) and compute PID so control stays accurate at that (or nearby usual) temperature. For example:
- If the equipment usually runs at 500℃, summary 1 suggests setting that usual value (e.g. 500) for AT so parameters match 500℃ control.
- Summary 7 suggests AT at 50-80% of the usual temperature (e.g. usual 200℃ → set 100-160℃), still anchored on the usual/use temperature as the reference for later 200℃ control.
### Relation between start-up and ambient temperature
In some scenes AT start time also uses ambient (e.g. from room temperature). That is an operating tactic (avoid overshoot, smooth transition), not the tune's target baseline:
- Summary 4 compares "start at room temperature" vs "start near target": initial temperature affects the tune process, but the goal is still parameters at the target/use temperature.
- Summaries 9 and 11 say start from ambient with setpoint at a fraction of working temperature - ambient is the starting point for a smoother AT; the end goal remains matching working/use-temperature control.
In short, AT aims to match use-temperature control needs; ambient is mainly an initial-state reference when starting AT, not the core baseline of the tune.
