Hi Guys, So I got my Lulzbot Taz 5, new to 3d printer, first thing that I did was read the entire mhackney guide.
Leveled the bed with a gauge indicator, got the first layer as perfect i i thought it can be, but I’m having a problem.
The first tests that I did was with ABS, got 3 prints perfect, the octopus, the mount for the gauge indicator and a spare herringbone gear, all cool.
Then i switched to PLA, because i wanted to print something bigger, and for what i read PLA is more dimensional stable.
First layer perfect, 5 hour print, and my PLA start striping, removed the filament, cleaned the hobbed bolt (without disassembling the extruder) as whell as I could, put the fillament back in, tightened the two screws that make pressure on the filament. Few print hours, same thing. Few hours of print, filament start stripping.
Things that i noticed:
- There is a small friction on the path of the filament between the hobbet bolt and the extruder, exactly when the metal part meets the plastic one, the filament need to be pushed on the correct angle, once is passed that small gap I can feel any friction.
- once and i while i can hear a small “click” that I’m almost sure that is the hobbet bolt slipping.
- It looks like the hobbet bolt is not perpendicular with the herringbone gear, doesn’t it? Check the pictures.
I’m not sure what I need to do now, disassemble the extruder? clean everything and try again?
First test was default fast settings for cura and PLA on Taz 5. Second test I increased 5 degrees on both the extruder and the heated bed.