BTT Scylla Recall - 12VDC Relay

[PFarm]

According to the discussion in Discord Biqu is recalling BTT Scylla V1.0 motherboards that were shipped with the 12VDC relay. If you have the 12VDC relay contact your vendor for a replacement board. The replacement board will have a 5VDC relay.

Wrong Relay:

Correct Relay:

Edited February 28, 2025 by PFarm

[Wick]

Many thanks for the info!

[PFarm]

The new replacement Scylla board came in today. I waited for the new board to make wiring and hardware changes. Removing the 350w 24v power and replacing it with a 24v 60w DIN mount PS, since the stepper motors are connected to a 36v PS, only 30w is needed to run the board, but the 60w I purchased was cheaper than the 30w. Also changing out the 12v PS that supplies power to case fans, water pump and rad fans to a DIN mount PS. I'll be relocating the Scylla to where the 24v PS was and shortening the wires. I'll be adding UK2.5 DIN terminal strips as well.

You can follow the changes on my Milo V1.5 build thread if you like: Milo V1.5 Build

Edited May 6, 2025 by PFarm

[PFarm]

Got the onboard 12V relay swapped out with the proper 5V on the original Scylla board. It was an easy swap, five desolder points and the relay out.

[NewGradRN]

Just found this info, quickly verified mine.. Thanks

[Jerazmus]

I would not have known about the Scylla if I didn’t come looking in your write up. Thanks for your experiences as always. You have been a great help to me so far. I also juuuust finished printing the parts for my casa enclosure. Still haven’t finished building the Milo yet. I brought it with me to my girls house for the weekend free time to build and forgot my roll in t nuts. I’m so upset. LOL. It’s just going to be longer and longer before I get mine up and going.

Edited August 17, 2025 by Jerazmus

[PFarm]

7 hours ago, Jerazmus said:

I brought it with me to my girls house for the weekend free time to build and forgot my roll in t nuts. I’m so upset. LOL. It’s just going to be longer and longer before I get mine up and going.

You're welcome, glad I could help. Well, that sucks that you forgot them!

[PFarm]

I'd unsoldered the 12V relay and replaced it with a 5V one, but this is the second one that failed. Maybe that's why they're backordered at the moment. So the replacement for the one that was under warranty also failed three months after I'd installed it. Luckily, I have a spare board that I can swap out while I repair the relay.

I also have two spare relays on hand. When you buy a replacement for Ali, they come in lots of 5.