Working on a Mini v1.02 that I got second hand, and have fixed nearly everything wrong with it (replaced a few printed/purchased parts, fixed threaded inserts that had popped out, etc.). While working through the behaviors and issues, I noticed that the Z-stepper driver on my Mini Rambo v1.1b had the thermal adhesive residue, but the heatsink was long gone, not even in the case anymore
Should I replace this now-missing Z-driver heatsink? Was it removed in a later revision or service bulletin? I can imagine the Z-stepper has a more difficult life due to the two-motor-load, so I am hesitant to leave it as-is since it was clearly there to begin with.
I’ve cleaned off the adhesive residue in the meantime, and visually inspected everything for damage and heat-discoloration, and found nothing frightening, but I want to ensure long-term reliability. I welcome everyone’s thoughts on the matter.
Thanks in advance!