I like this for the math, https://www.advanced3dprinting.com/flow-rate-calculator/
2 Likes
I use prusaslicer.
The seam is random. So it might be that.
If you have the latest PrusaSlicer, there are 2 new views
Actual Speed
Actual Volumetric Flow Rate
These views can really help in showing where potential quality issues might arise, or correlate things you see
You can see here what a Random seam looks like, and where the surface will have zits likely
You will need to have the Machine limits set up properly to get an accurate picture though
1 Like
Will double check the limits this evening. Overall, the prints look good enough other than that void. I think the void may have popped up when I bumped from 100 mm/s to 120 mm/s print speed.
1 Like
Update: I’m getting dimensional weirdness with my printer now. I printed some Y belt tension parts and the inserts don’t fit in the table mounts… by like a couple mm. I print a 100x100 box and it is 99.6 mm. The 0.4 mm should be fixable with an extrusion multiplier, but something isn’t right. I noticed the bed with its slide mounted springs had some left-right wiggle, so I moved the slides to make the bed more fixed. I think the pressure advance is wrong. the corner looks perfect on the base layer at 30 mm/s, but the same corner above that base layer at 100 mm/s shape has a ~1 mm radius for all movement above it, so I’ll look at that again. I’m using a creality white PLA. It may just be too hot at 215 C. The sidewalls are wavy. Any thoughts?
Like what? Ripple-y??
I had this once and realized that my mount screws had loosened on me. If the mount plates are all screwed in well, I don’t think there should be any wiggle.
It isn’t the plate. It is the motor to plate support strut - this part:
it cannot be in the middle of the slot or I haven’t crushed the spring enough.
So if you grab that front extrusion, the whole assembly wiggles easily?
it used to: left-right about 2-3 mm. I need to try front-back. I reprinted the box to see if its dimensions changed.
The only time mine ever wiggled, I think, is when these screws had worked themselves loose
If I remember correctly, once I tightened those up, it is pretty rigid now. I’m not at home now to confirm though.
I loosened those screws and moved the plate towards the side of the printer to put the bolt at the end of the slot then cranked them down. In the photo imagine that plate moving left as far as it will go. I moved the one on the right to the right and the bed no longer moves.
This is a facepalm moment. Why wouldn’t I have checked this before printing at all?
I really want dimensional accuracy and more speed.
3 Likes
Gallery art submission:
I call it “ode to grub screwup.” I hope you enjoy. It will be on display for the rest of the internet’s life and probably not even worth the materials used to make it. I hope as you gaze carefully it is incongruent lines and casually stepped exterior you will take time to reflect on the … whatever. I’m an idiot some days. I hope your day is going better than mine was.
6 Likes
I didn’t get around to tagging all of the docs…… but……
This warning in the motor mount section
Applies to the entire assembly.
A lot of my screws loosened up after I ran it hard and I had to go back and put thread locker on all of the ones that didn’t have lock nuts once they were set right
had threadlocker, but the pulley was too high and was rubbing the belt, so I lowered it, then didn’t tighten both of them…
EDIT: turns out lowering the pulley put it on the round rather than keyed part of the shaft. so I dremeled the key closer to the motor and now it should be ok…
1 Like
For screw-ups they look pretty good!
2 Likes
Those definitely lack artistic vision though …
2 Likes
This is almost comical now and borderline sad. Clearly some of us have no business 3d printing…
not quite as intended. Here is the full experience:
I’m just going to leave it there and not make any excuses for why I’m not printing more LR parts these days…
3 Likes
I imagine it is either a stepper current issue (too low), or an acceleration issue (too high).
Agree with Ryan.
What settings are you running for the tmc2209? And what acceleration are you running??