Simple Active Chamber Heating Upgrade – Anycubic Kobra S1

Best way to say thanks? Post a make.

Struggling with warping, layer adhesion, or printing materials like ABS, ASA, or Nylon on your Anycubic Kobra S1?

This active chamber heating upgrade fixes that—without modifying your printer.

⚡ Key Features

• No printer modification required

• 2-second install

• Removable / reversible

• Active heating (not passive enclosure heat)

• Designed specifically for the Kobra S1 geometry

🛠 Installation (Seriously this easy)

1. Remove the factory lid

2. Set the printed assembly in place

3. Reinstall the lid

4. Slide heater unit into the rear slot

Done.

🔥 What It Does

• Raises internal chamber temperature

• Reduces warping and edge lift

• Improves layer bonding

• Enables reliable printing of:

  • ABS

  • ASA

  • Nylon

  • Polycarbonate blends

  • Even some PP if you are crazy enough

• You will not hit industrial chamber temps (70–90°C) with this setup.
  But you don’t need to for:

  • ABS → ~40–50°C is plenty

  • ASA → ~45–55°C ideal

  • Nylon → ~50–60°C helps a lot

⚙ Heater Specs (Real Hardware – Not Guesswork)

This system is designed around a compact PTC ceramic air heater, with the following characteristics:

• Power: 200W

• Voltage: 110V AC

• Heating Element: PTC ceramic thermistor

• Heating Mode: Forced air (fan-assisted convection)

• Temp Protection: Built-in thermal cutoff (~160°C safety limit)

• Expected Life: 3+ years typical operation

• Mounting Style: Inline / drop-in (no permanent install)

These heaters are commonly used for small enclosed environments and equipment heating, making them ideal for printer chambers

🧠 Why This Works (Important)

PTC heaters are self-regulating:

• High output when cold

• Automatically reduce power as temperature rises

• Maintain stable chamber temps without runaway heating

That means:

• No constant cycling

• No overheating risk

• Stable print environment

💡 Why You Need This

Without chamber heat:

• ABS = warp

• ASA = split layers

• Nylon = inconsistent strength

With chamber heat:

• Parts stay flat

• Layers fuse properly

• Prints finish successfully

This upgrade effectively turns your S1 into a true enclosed engineering printer.

🧩 Design Notes

• Clean OEM-style integration

• Maintains airflow path for proper heat distribution

• Compact footprint

• Designed for easy printing + repeatability

📦 Print Info

• No supports required (recommended orientation dependent)

• PETG or ABS recommended for heat resistance

• PLA works but not ideal for long-term heat exposure

⚠ Safety Notes

• Use heaters with thermal cutoff + insulation

• Do not block airflow

• Keep wiring clear of moving parts

• Always monitor first use

💬 Final Thought

This is the upgrade that unlocks what the Kobra S1 should’ve been capable of out of the box.

Buy the heater here:  https://www.amazon.com/dp/B0DPFMN29N?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1