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Temperature - Chamber

Chamber temperature control settings

temperature, chamber, pid

A heated chamber keeps the ambient temperature around the print area consistently warm to prevent rapid cooling that can warp the part. This improves layer adhesion and reduces dimensional shrinkage for high‑performance polymers. Adjust settings for the optimal environment to ensure a smooth, distortion‑free print.

Quick reference

Feature	Option	Default	Notes
PID control for chamber	`PIDTEMPCHAMBER`	undefined (bang‑bang)	Enables PID loop; requires `DEFAULT_CHAMBER_(KP\|KI\|KD)`.
Chamber hysteresis	`CHAMBER_LIMIT_SWITCHING`	undefined	Active only when PID is off.
Max chamber power	`MAX_CHAMBER_POWER`	255	Use <255 only if you accept PWM on the chamber heater.

#define PIDTEMPCHAMBER

Enable PID control for the chamber heater.

When defined, a PID loop drives the chamber at the same frequency as the extruder PWM.
When disabled, bang‑bang is used; CHAMBER_LIMIT_SWITCHING can be enabled to add hysteresis.

👁️ Example

#define PIDTEMPCHAMBER true

#define MIN_CHAMBER_POWER int

Minimum power to improve PID stability.

#define PID_CHAMBER_DEBUG

Print chamber‑PID debug data to the serial port.

#define DEFAULT_CHAMBER_KP float

Proportional gain for the chamber PID.

#define DEFAULT_CHAMBER_KI float

Integral gain for the chamber PID.

#define DEFAULT_CHAMBER_KD float

Derivative gain for the chamber PID.

#define CHAMBER_LIMIT_SWITCHING

Keep the chamber temperature within CHAMBER_HYSTERESIS of the target.

Only relevant when PIDTEMPCHAMBER is not defined.
The switch creates a hysteresis band around the set‑point.

#define MAX_CHAMBER_POWER int

Max duty cycle for the chamber heater (0–255).

When below 255 a PWM divider is applied to the chamber driver.
Use only if you are comfortable with PWM on your heater.