Marvin Failing half way / Not Sticking - Z Height too high?
Hi all,
First timer here. My first few print attempts after assembling the kit haven't gone well. From reading the forums I suspect it may be the Z Height that is causing an issue. I did the calibration in the firmware, but can't say for sure that the nozzle is low enough. It's set to .565mm now.
I just wanted to see if anyone can confirm quickly that that's probably my issue.
See this picture, From left to right:
Re: Marvin Failing half way / Not Sticking - Z Height too high?
Definitely needs to be lower
Re: Marvin Failing half way / Not Sticking - Z Height too high?
Looking at the skirt, it's an adhesion problem. Those can have 2 causes:
[...] From reading the forums I suspect it may be the Z Height that is causing an issue. I did the calibration in the firmware, but can't say for sure that the nozzle is low enough. It's set to .565mm now.
1. A dirty PEI print surface. Even if you don't think this is the cause, it's always a good idea to make sure your PEI surface is clean. Take it to the kitchen sink and give it a good dunk with Dawn dishwashing soap. Use a clean paper towel to clean it off, and another to dry it. Above all else, avoid touching the PEI print surface. Once it's good and clean, you should be able to use 91%+ isopropyl alcohol between prints, 100% acetone when that fails, and another dunk when acetone fails.
2. If you have not already done so, try using Jeff Jordan's "Life Adjust" procedure for calibrating your Live-Z setting. It is much easier to use and understand than the on-board routine.
Try those 2 steps. If you're uncertain of the Live-Z results, post pics here of the 75x75 print bottom and you'll get quick help. In general, start high (less negative) and work lower (more negative) in large increments (e.g. 0.1mm) until the filament starts to stick on its own. When it's right, you should be able to gently rub it without it coming loose. Then start lowering (more negative) the level until there are no gaps between layers.
Re: Marvin Failing half way / Not Sticking - Z Height too high?
Thank for the help.
I cleaned the bed as described (aside from the acetone as I just now got some) and ran "Life Adjust." I found that -.870mm provided good results.
See the 75x75 print here, the "loose" side is -.800mm the other is -.870mm which felt smooth and solid (though some light could come through in some spots):
After that I was successfully able to print marvin:
Any additional thoughts? I think I'm in pretty good shape now.
Re: Marvin Failing half way / Not Sticking - Z Height too high?
The brim around Marvin looks pretty good. When you've got your PEI clean and Live-Z calibrated, you'll be able to print Marvin with no brim or other nonsense. Good job! Now clear some shelf space for dozens of little aliens and plastic boats.