Anycubic Chiron Firmware 135 ((exclusive)) Download Repack 🎁 Full

Anycubic Chiron Firmware 1.3.5 Download: The Truth About "Repacks" & Safe Upgrades

Published by: 3D Print Tech Lab Reading time: 4 minutes

If you own the Anycubic Chiron (the big beast with a 400x400x450mm build volume), you know that stock firmware can feel... limiting. Lately, I’ve seen a spike in searches for “Anycubic Chiron firmware 1.3.5 download repack.” anycubic chiron firmware 135 download repack

Let’s cut through the noise. What are you actually looking for, and is a “repack” safe? Anycubic Chiron Firmware 1

Official Sources:

  1. Anycubic Official Website – Support / Downloads section
  2. Anycubic's GitHub – Some official releases are mirrored there
  3. Official Anycubic Facebook Group – Moderators share verified files
  4. Contact Anycubic Support – They can email you the correct .hex file

Phase 2: Upload the Motherboard Firmware

  1. Power off the Chiron.
  2. Remove the LCD ribbon cable (this prevents screen conflicts).
  3. Power on the printer.
  4. Open XLoader.
  5. Select Marlin-Chiron-1.3.5.hex.
  6. Device: Mega 2560 (not Uno).
  7. Baud rate: 115200 (check repack notes; some use 250000).
  8. Click "Upload". Wait for "Upload complete" in blue.

3. Safety First

The community repack enables true thermal runaway protection. If your thermistor falls out or your heater cartridge stays on, the printer will halt with a warning instead of catching fire. Anycubic Official Website – Support / Downloads section

Part 1: Flashing the Main Board Firmware

  1. Prepare the printer: Turn off the Chiron. Remove the SD card. Unplug the USB cable.
  2. Jump the bootloader pins (if needed): The original Trigorilla board often requires you to short two pins (BOOT0 and 3.3V) before flashing. The repack’s README includes a photo. Many users skip this by using the “reset-then-flash” method:
    • Open Cura → Machine → Install Custom Firmware.
    • Select the Marlin-1.3.5-Anycubic-Chiron.hex.
    • Click “Install”.
    • The moment you see “Uploading…”, press and release the reset button on the main board (near the USB port). This forces the bootloader to listen.
  3. Wait for the progress bar to complete (40-60 seconds). Success message = green checkmark.