New print Fan and Shroud - slight mod needed, and obstructed view
Completing the kit, I found I had to very lightly file a bit off the forward end of the shroud (either side of what looks like 'pincers') to avoid it scraping during printing. The tolerances are very tight, and I think for me it was a combination of doing that and loosening the screws on the mount attached to the fan to get a bit more angle upward and away from the plate.
By the way, I think I'm going to end up renaming this "failure shield" because I am certain that if I have a failed print that sticks to the nozzle, I will not know for quite some time with the fan and shroud in the way. I think anyone doing this upgrade may want to reconsider where they are pointing their cameras to try to get some earlier warning.
RE: New print Fan and Shroud - slight mod needed, and obstructed view
The nozzle sits lower then the entire shroud - so it shouldn't ever touch the bed or the print etc in the first instance?
Or am I misunderstanding you?
--> MK4 - MK4S - MINI+ - Accelerometer Guide <--
RE: New print Fan and Shroud - slight mod needed, and obstructed view
However, this appears to be what happened in my case. I checked the construction multiple times, this wasn't a build mistake. The nozzle was lower, but not enough to keep from interfering. Perhaps a trick of the light and somehow doing what I did relieved it of whatever voodoo was causing the first prints to fail, because it worked.
I would love a picture that shows the nozzle very free and clear of the shroud. I would like to know that that gap should look like.
Thanks
RE: New print Fan and Shroud - slight mod needed, and obstructed view
The nozzle was lower, but not enough to keep from interfering. ...
I would love a picture that shows the nozzle very free and clear of the shroud. I would like to know that that gap should look like.
That really sounds like there is an assembly issue, or a badly printed shroud. On mine, the shroud is level and about 3mm above the nozzle tip. No way it could hit a print, unless the print warped and lifted by 3mm somewhere. I will attach a couple photos with the nozzle touching the bed for reference.
RE:
Oh, and here is a closeup showing the nozzle is fully inserted into the heatsink, and not lower than it should be for the previous photos.
RE: New print Fan and Shroud - slight mod needed, and obstructed view
Thanks Ifti and Scott. Clearly I was wrong. A picture of my own nozzle confirms that it looks like yours. I could have sworn that shroud was scraping, but I did unscrew all 4 screws and position it upward a bit more, so maybe that did it. Or perhaps I was completely wrong, and the early print failures were completely something else. I think it might be useful to remove this post because I don't want to add to the noise if what I said isn't seen by others.
I attach my own picture.
Regards.
RE: New print Fan and Shroud - slight mod needed, and obstructed view
It's all good, glad to help. And I hadn't measured it before, so your question made me learn there is 3mm clearance. 🙂 The pictures may also help someone in future with assembly or troubleshooting. Discussions like this add to the knowledge base for everyone.
As an aside, but related, I will add that the one disadvantage of the "S" upgrade is the nozzle visibility. That cooling shroud and fan are huge, and it is now much harder to see what's going on right at the nozzle -- especially when printing small parts. I may have to invest in a "nozzle cam" soon!