Klipper Oven Macro

A custom G-code macro for Klipper that allows you to use your 3D printer's heated bed as a makeshift oven. Perfect for curing silicone parts or any application requiring controlled heating over a period of time.

Table of Contents

• Features
• Installation
• Usage
  • Starting the Oven
  • Canceling the Oven
• Parameters
• Examples
• Recommendations
• Safety Precautions
• License

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Features

• Customizable Temperature and Time: Set your desired temperature (°C) and duration (minutes).
• Non-Blocking Operation: The macro remains responsive and can be canceled at any time.
• Prevents Heater Idle Timeout: Reissues the heater command periodically to prevent the heater from turning off automatically.
• User Feedback: Provides real-time updates via M117 messages and console responses.
• Safety-Oriented: Designed to prevent conflicts and ensure safe operation.

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Installation

Fast One-Liner

This will download the .cfg to the default Klipper config directory, add the [include] line to your printer.cfg, and restart Klipper.

curl https://raw.githubusercontent.com/amicloud/klipper_oven/main/oven.cfg -o ~/printer_data/config/oven.cfg && sed -i '2i\[include oven.cfg]' ~/printer_data/config/printer.cfg && systemctl restart klipper

Manual Installation

1. Download the oven.cfg File:

   • Download the oven.cfg file from this repository.

2. Include oven.cfg in Your Configuration:

   • Add the following line to your printer.cfg file:

     [include oven.cfg]
     

   • Ensure that oven.cfg is placed in the same directory as your printer.cfg file. If it's in a different directory, adjust the path accordingly.

3. Save and Restart Klipper:

   • Save the printer.cfg file and restart Klipper to apply the changes.
     • You can restart Klipper by issuing the RESTART command in your terminal or through your printer's interface.

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Usage

Starting the Oven

Use the OVEN macro to start the oven operation.

Syntax:

OVEN [TIME=<minutes>] [TEMP=<degrees Celsius>] [CHECK_INTERVAL=<seconds>]

• TIME: Duration in minutes (default: 60 minutes).
• TEMP: Target temperature in degrees Celsius (default: 60°C).
• CHECK_INTERVAL: Time between status checks in seconds during the holding phase (default: 60 seconds).

Example:

• Start the oven at default settings (60°C for 60 minutes):

  OVEN
  

• Start the oven at 70°C for 90 minutes, checking every 30 seconds:

  OVEN TIME=90 TEMP=70 CHECK_INTERVAL=30
  

Canceling the Oven

Use the CANCEL_OVEN macro to cancel the oven operation at any time.

Syntax:

CANCEL_OVEN

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Parameters

• TEMP (float):

  Target temperature in degrees Celsius for the heated bed.

• TIME (float):

  Duration in minutes for which the bed should hold the target temperature.

• CHECK_INTERVAL (float):

  Time in seconds between each status check during the holding phase. Adjusting this can balance between processor load and update frequency.

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Examples

Default Operation

Start the oven at 60°C for 60 minutes, checking every 60 seconds.

OVEN

Custom Temperature and Time:

Start the oven at 65°C for 120 minutes.

OVEN TEMP=65 TIME=120

Custom Check Interval:

Start the oven at 55°C for 45 minutes, checking every 15 seconds.

OVEN TEMP=55 TIME=45 CHECK_INTERVAL=15

Cancel the Oven Operation:

 CANCEL_OVEN

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Recommendations

Use a Heat-Resistant Cover

To improve heat retention and even distribution, it's recommended to place a heat-resistant cover over your build plate. Materials like ASA (Acrylonitrile Styrene Acrylate) are suitable for this purpose due to their thermal stability.

Example Setup

• Use an FDM-printed ASA lid to cover the build plate.
• Keep the printer in an enclosure to maintain consistent ambient temperatures.

Benefits

• Enhances heat retention, leading to more efficient curing.
• Provides a controlled environment, reducing temperature fluctuations.

Ensure Material Compatibility

• Verify that all materials used (molds, platters, covers, etc.) can safely withstand the target temperatures.
• Avoid materials that may deform, melt, or release harmful fumes at your operating temperatures.

Avoid Obstructing Sensors

• Ensure that the cover does not block any airflow or thermal runaway sensors.
• Proper sensor operation is crucial for safety mechanisms.

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Safety Precautions

• Supervision Required:

Always monitor your printer while it's operating as an oven to prevent any hazards.

• Fire Safety:

Keep a fire extinguisher nearby and ensure smoke detectors are operational.

• Ventilation:

Operate in a well-ventilated area if curing materials that may emit fumes.

• Temperature Limits:

Do not exceed the maximum safe operating temperatures for your printer's components.

• Heater Stability:

The macro periodically reissues the heater command to prevent the heater from turning off due to idle timeout. Ensure this aligns with your printer's safety protocols.

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License

This project is licensed under the MIT License.