BIGTREETECHOctopus Pro V1.0 Motherboard 32bit New Upgrade with Octopus Control Board Compatible TMC5160 Pro Stepper Driver, Support Powerful DIY for 3D Printer (Main Chip is STM32F429ZGT6)

I'm converting an Ender 5 to have 4 extruders and a Zonestar M4V6 4in-1out mixing hotend. Most mainboards don't have at least 7 stepper drivers (X,Y,Z,E1,E2,E3,E4), but these do. You'll be building your own firmware for it, which will be a bit of work, but once you have it all set up, it'll work great. It'll give you more ports for doing dual Y and/or Z too.If you haven't done your own Marlin firmware before, it'll probably take you a couple days to go through all the decisions on where to put things, and configure the Configuration*.h files. Not impossible, just a little time consuming. It doesn't even require programming, just the ability to read plain English words, and pick the options.The biggest caveat that isn't documented is, you have to use a small SD card with it. It can't read any of my larger CF cards. That took me a while to discover. I'm using a 128MB card, which does work. I really don't have many cards less than 32GB, so I really had a hard time finding one. So when you can't flash the firmware, or read the card for gcode, go get a *smaller* SD card.

This is the second board to fail, both failed in the same way: I would get things working, do some motion tests, then leave it idle for an hour or so. when I came back, all attempts at motion would result in a stuttering noise and a loss of communication with the drivers. I externally tested the drivers and they seem to still work. (sorta) (I killed the first board attempting to diagnose the problem)

This is installed in a Voron 2.4 350x350 and a voron 2.4 r2 500x500 its a great board and is easy to work with in klipper have not used it for marlin but nowadays who uses marlin?

I'm in the process of rebuilding a 4 printer farm, and am stdizing on the Octopus, some normal, some pro. All will be running klipper and all will have bananapi-m5's for management,

I wanted to upgrade my 8 bit Anycubic Mega X board to a 32 bit board. I needed 5 motor drivers, but many of the boards only had room for 4. I considered the Spider but for about the same price decided on the Octopus. I was going to install Clipper so the added plus was that the BTT board had great documentation made it the logical. I paired the board with TMC2209 stepper drivers in uart mode and once wired up everything just works. Still have some tuning to do, but I am pleased with the way everything has worked out.