The project starts with the failed print. Came down to find the print a mess, and the printer unable to move the Z axis up. I plugged a spare stepper motor into the Z Axis channel and I could stop the motor with light finger pressure. I help run the local makerspace with several Lulzbot printers and I recognize this as a classic case of the blown Z Axis driver. The Lulzbot uses a RAMBO board with integrated drivers, so there is no easy way to replace the circuit.

I've performed a replacement of this board on the printers at the makerspace, that wouldn't be a challenge. The challenge is that the board is not available from Lulzbot, and the cost from other sources is $175, and I would be on the TCM2130 drivers, good drivers but I didn't want integrated drivers again. Also I wanted a higher voltage & current driver as the Lulzbot print head is a bit of a beast and if I wanted more speed, I would need more raw power.

The RAMBO format is also missing some of the features I want, Filament Sensor, BL Touch support. The board has served me well for 6 years, time to try something new.

I've installed a few BigTreeTech boards in other 3D Printers I've built with friends. I'm familiar with their style of documentation, I've compiled Marlin for the boards. Also, they have a sale right now. So I ordered the bits I need, and I'll get started marking wires and removing the old control board.