RE: First layer fail
@tim-m30
I wasn't paying attention when it happened, I was printing business cards so I made sure the first layer was good, walked away and found it on top of one of the cards. It looked like it was part of the print stream and I just plucked it off. Maybe it was an ooze, I don't know. I didn't do a final torque at that temp so perhaps thats it. I read on Prusa to just hold the block and take off the nozzel, and some say loosen the heat block, then remove the nozzel (which I did) and then reversed it. When I tightened the heat block I did have to tighten it beyond where it originally was so it's slightly off 90deg orientation. I do have other prints that show burnt marks on them.
RE: First layer fail
If you did disassembly at room temp, there is a fair chance you bent things. Doesn't always happen, but the cold torques are high enough you might not feel the heat break bending as you break the nozzle loose.
A close inspection is in order. Here's a link to the E3D procedure. It probably wouldn't hurt to work through it to reinstall the nozzle, and follow it carefully as you put things back together.
https://wiki.e3d-online.com/E3D-v6_Assembly
https://e3d-online.dozuki.com/Guide/Changing+Nozzles/45
Random black specs on prints can happen from spiderwebs accumulating on the heater block and falling off during printing. These are rather hard to prevent, but a silicon sock helps.
Large droplets are different. These are usually from two sources: ooze during warmup that aren't wiped during purge then linger and drop off during printing: there will be one and only one drop of this type during a print. A second type of drop is the thread leak variety caused by improper hot-end assembly. These will be random and varied droplets of melt and stringing throughout a print. Sometimes a drop, sometime no drops, sometimes many drops. Random. Inspecting the heater block will usually identify a leak. A glassy film of old melt on the sides of the block are a clear indicator the hot end is leaking; and glassy melt in the space about the nozzle hex is another.
RE: First layer fail
@tim-m30
ok, well I decided to remove the entire hot end assembly to clean and really inspect the break, however, I hadnt found any comprehensive steps to get past the point to remove the entire unit for dis assembly. I was hoping to do this without totally dis assembling the entire print head and removing the belts. Any good vidios to watch or procedures?