{
  "id": 19456921,
  "title": "Waiting for chamber heat before an ASA first layer, with a Klipper macro and a small Python check",
  "url": "https://urgent.news/2026/11/11/waiting-for-chamber-heat-before-an-asa-first-layer-with-a-klipper",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-11-11T06:16:35.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/gamsgoworld/waiting-for-chamber-heat-before-an-asa-first-layer-with-a-klipper-macro-and-a-small-python-check-j58"
  },
  "original_language": "en",
  "account": "Waiting for chamber heat before an ASA first layer involves setting the bed and chamber to specific temperatures and waiting for the chamber to reach its target temperature before starting the first layer. This is important because ASA shrinks as it cools, and if the bed is hot while the chamber is still cold, the first few layers may have issues. A closed door helps maintain a stable environment.\n\nMany printers already heat the bed in the start G-code and then dive into G28. However, adding an explicit chamber wait with a timeout can prevent the printer from sitting there forever if the heater fails. The exact sensor names may vary, so it's essential to check the printer's configuration before using the code.\n\nThe macro described in the text heats the bed and chamber and then waits for both temperatures to reach their targets. If the chamber heater is not present, the macro should not be used. Instead, a timed heatsoak after the bed is ready with the door closed can be used as a fallback.\n\nA small Python script can be written to check the chamber temperature against Moonraker API and prevent sending the job early if the wait times out. This combination of the G-code macro and the Python check can help ensure that the first ASA layer is started only when the chamber is at the desired temperature.",
  "summary": "Disclosure: this post contains affiliate links; I may earn a commission at no extra cost to you. ASA is less about heroic retraction settings and more about not starting the first layer while the chamber is still a cold box. I have not tuned ASA on a machine of my own for this article. The temperatures below are typical starting ranges from manufacturer sheets, and the code is a pattern you…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}