Lulzbot mini v1. Nozzle is too high above calibration contacts

General LulzBot Mini
1

I cannot even bring the nozzle to touch any of the four metal contacts around the bed if I move the hot end manually using the “Jog Position” controls. There seems to be a 2 or 3 mm Z-axis gap there. Somewhere along the way the machine is confused. Is there anything I can do to rectify this? I think it’s making the machine throw up error and abort a print when it can’t complete the circuit when it tries the bed levelling procedure at the start of a print. When it does, it just keeps going back to clean the head after it cannot complete the circuit—assuming it’s too dirty—when the reason is it’s too high above those points.

2

It’s a known bug with the latest firmware. Some default toolhead offsets were changed on the common toolheads, so the legacy printers with legacy toolheads end up requiring offset adjustment to compensate. Or you can just load old firmware from download.lulzbot.com.

3

Thanks. Which version Mini software would you recommend? I’m thinking Mini/1.04/software/firmware? And which file do I use?

Marlin_Mini_Source_v1.1.0.11_fb1929d.tar.gz

Mini-Single-or-Flexystruder-LBHexagon-v1.1.0.11.hex

SHA256SUM

Example, if it’s the Hex file when I download it macOS adds a .txt extension after the .hex file type. Do I remove the .txt extension or no?

I know where to install via “Custom Firmware” I’m just unsure what to install and how it needs to be packages or file-labelled for the window to except the file for installing.

4

Use Mini-Single-or-Flexystruder-LBHexagon-v1.1.0.11.hex

Yes, remove the .txt extension. It probably doesn’t matter, but the software may not see it as valid firmware to send without the corrext extension.

5

I got it to install, thanks. The issue now is I’m seeing this error in Cura:

Firmware Version Mismatch

The firmware on your printer doesn’t match the version included in this copy of Cura LE. It may be older or newer. Please update your printer’s firmware to the included version to ensure optimal performance and compatibility.

6

Well, you can always run an older version of CuraLE.

So long as it works, just ignore the warning. The major differences between the versions with firmware boil down to how it handles the wipes at the beginning of a print.