This is an extension of other threads pertaining to my efforts to get my Sapphire Plus working. The folks at TwoTrees have asked me to reload the original firmware that came with the printer. Okay, so, I put the flash drive that came with the printer into the slot and started it up. Didn't seem to have any effect, at least it didn't affect the problem I'm having. (when homing the Z axis, the printer doesn't stop when it hits the limit switches).

So, a couple of questions. Which file has the firmware on it? I found a file called robin_non35_cfg.txt file that's in the "firmware" folder. There is also a file called robin_nano35.bin in one of the subfolders. Does it need to be in the root of the flash drive to be found on startup?

Like I said, very basic stuff, but the first time I'm trying to do it.

Thanks. Ron