I’ve been pretty confused about why so many people are using vents. I have been printing a lot in regular PLA and never had a problem with the door closed and the cover closed. I did print something in pla tough the other day on the ridiculous speed and it came out looking horrible. But when I print with pla tough at standard speed it looks fine. I’m not sure if this is because of heat or just speed but regardless, I’ve been keeping the door closed.
I’ve no problem printing with the enclosure closed. The chamber gets to about 40ºC and no higher for me, so perhaps that’s what’s helping? I’m also using the Textured PEI plate, which sets bed temperature at 55ºC.
So, yeah, this is a “good for me” post, but I still find those useful when I see them as it tells me that it’s not a consistent issue. Hope this helps nevertheless.
I had no issue since i removed this piece from the back!!! Printed a scull for 14h with no issue.
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I still use the Mk3 with brass nozzle, never thought about hardened ones.
When your brass .4 wears out (I never thought it would but it did) then I just ran a .5mm drill through it which actually makes a .6mm hole and use for a second time for faster printing.
The Mk3 is getting to be the dedicated TPU printer now, slow but sure to do the job.
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That sounds more like a drilling accuracy problem 
How were you measuring the resulting hole? A pin gauge?
Yes, a nice slip fit on the gauge, ordinary twist drills rarely drill their supposed size, that what reamers are for or bigger stuff a boring bar.
Practically any size within reason can be compensated for in flow settings, punch the ball out of a grease nipple and you could probably adjust for it.
install Orca Slicer and run the calibration function in the menu. Follow the instructions of the calibration for the new PLA you used in this forum. There are plenty hints and tipps for Calibration.
If you dont have any PLA issues, then dont calibrate and enjoy. If you have problems, then run the orca slicer and calibrate the new PLA.
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This is one of the best bits of advice I have seen for newbies “If you don’t have any issues, then don’t calibrate”, I remember watching all the YouTube things when I first got my Mk3, they all had so many ‘tweaks’ that I thought I must be getting it wrong, let me get it better from what I have.
Now I am still not and never will be an expert but looking back the machine was the same but looking at the environment it was in, was why some ‘tweaks’ worked only for them.
which piece did you remove?
The cool plate cannot real hold on to PLA parts if you don’t use the glue stick, which is a pain. For part to keep sticking properly during printing, you should have a clean plate (wiped with alcohol or windows cleaner to remove any finger greas) and set the bed temperature at 50 degrees. That then, requires you to open the door and ideally open the top cover. When PLA cools it lets og of the PEI plate, and that is why the glue stick is supplied I guess. Until I started wiping my plate (whether glass on my CR-10 or PEI on my Prusa) I never had a problem with parts coming loose until I got my X1C - where every second fell of if not using glue. Rising temperature to 50 got me right back to perfect sticking.
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I am using that riser. One thing I don’t like about it is when you take the glass off, it is too easy for the risers to fall into the printer. At some point, I am either going to print another type or adjust that one so it isn’t so likely to fall in the printer.
Bambu has a list of mods they recommend against, and a muffler was one of them. Long before I saw that list, I had printed that exact part. I didn’t end up installing it because I was reading different sources about the potential issues that could be caused by the muffler and decided not to use it.
In general, I try to take peoples claims with a grain of salt when they talk about non-recommended things like printing with the printer closed for PLA or not using glue for PETG, etc. and say they have no problems. For some there might be circumstances like a colder room or other variances, or they might have just gotten lucky or haven’t experienced the problems yet.
If you are doing something that’s not recommended and are getting problems, first stop the non-recommended things, and if the problem persists, then look to other causes.
Thanks for the comment! Very helpful