Need help diagnosing failed first prints
I've attached a picture of two models that started great, but ended a stringy mess. Somewhere around the hour mark for each print I hear a loud clicking noise that gets my attention. A few minutes later, I walk over and see strands of filament going everywhere. As far as I can tell each print starts great so I'm confused as to what the root cause could be. From many searches online I've come up with my own short list:
* Under extrusion
* Overheating hotend? (Some people say to blow a fan on the print area?)
* Extrusion length? I suppose this has to do with how much filament is being let through?
Hoping someone here will give me the right words to describe the problem I'm having. =)
RE: Need help diagnosing failed first prints
A close up photo of the bottom of the parts will be helpful, as will an image of the print bed you are using.
But looks like (and I am guessing from the appearance) the parts are coming loose during printing. Both parts have plenty of surface area to adhere well - so not a part problem. When parts have adequate surface area, this adhesion problem comes down to two main causes: finger prints on the bed (and alcohol isn't great at removing finger prints); and layer 1 calibration. The requested photos will help determine which is the biggest factor.
RE: Need help diagnosing failed first prints
Here are some more up close pictures. Note that I slightly scored the printing surface during my last z-axis calibration.
RE: Need help diagnosing failed first prints
Trying printing one of these ... it should pull off the bed similar to good masking tape.
ps: the bottom of the printed parts is what's important to see to gauge layer 1 properties.
RE: Need help diagnosing failed first prints
Attaching a few images from the 100mm model. Seems like I have a few issues. 🙁 The layer did come off similar to masking tape.
RE: Need help diagnosing failed first prints
When layer 1 is correct, and the offset has been set correctly, the piece should be a solid welded sheet of plastic.
While printing the circle, open the menu Tune: Live-Z and adjust the value more negative until the extrusions begin to weld together. Make small changes, -25 um at a time, watch for the result, then add another -25 - keep going until you see the threads welding to the last pass.
Also, Jeff's "Life Adjust My Way" post [sic] is recommended by most, and folks seem to be able to follow the method he suggests.
RE: Need help diagnosing failed first prints
The circle model worked great for me. Was able to print a pretty solid benchy and also managed to print a flexi-raptor! I'm very thankful for the link to the post and the quick responses.
Thanks!
RE: Need help diagnosing failed first prints
Good to hear ... and now that you have layer 1 down; keep in mind finger prints are your nemesis. Never touch the print surface with fingers. And if you do, using a fresh paper towel as a scrubber with dish soap and hot flowing water is the best way to get the surface back to printable. Then handle the bed only by the edges.