While in the process of input shaping I noticed there is rippling not associated with acceleration or frame vibration. It is much more prominent then Y axis is moving and less noticeable on X. As the speed of printing increase - this tippling starting to smooth out but spacing between ripples is the same regardless of the speed. I am assuming this has something to do with the motor /belt / gears on the Y axis?
X axis also moves much more noisier than Y axis but surface is much smoother
I think your belts might be a bit too tight. I think that stuff is the concentricity of the idlers and pulley’s but it only shows when the belts are super tight. The belts across the back should not make a sound when plucked.
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It’s pretty loose now, definitely not making a sound when plucked. I was able to tune up the belt a bit but that stuff did not fully go away.
Printing at 200mm/s and 3000 acceleration
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I think I found a speed limit of my printer. This benchy printed at 500mm/s at 6000mm/s^2 acceleration. Still came out vey good, no steps were skipped but printer was jumping in the table
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Love it!
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I must just suck at building 3D printers. I couldn’t get mine to run at 50/mms with 3000 acceleration lol. Here you are at 500 and 6000. I think my acceleration is down to 800-1000 and it’s running along happy as can be. So that makes me happy lol
I spent like 3 days calibrating it both mechanically and software. At the beginning it was barely able to handle 70mm/s and 1500mm^s2.
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Currently troubleshooting bed leveling. Symptom is that after bed leveling it’s worse than before. Measurements are very consistent from one run to another, however. I suspect that because Z axis goes into an opposite direction (0 at the top and max value at the bottom), probing is happening “from the bottom” of the bed and bed leveling corrections applied in the opposite direction multiplying bed unevenness. I will do all grid measurements tomorrow to compare before / after leveling to confirm this theory but if someone recognizes this issue please advise
Already seen Mp3dp v4 slow build - #101 by azab2c, and the post that follows? We’re using Klipper, but maybe some equivalent Marlin config setting for Stepper dir needs to be flipped?
Ran into Z-tilt issue where adjustments made things worse… https://azab2c.com/make?t=31_30_54&v=5_6&r=1.4
Amongst other things, looks like I didn’t plug into the correct Stepper Driver at some point 
My motors move into right direction and z-leveling works too 
Pretty happy with 0.15mm tolerance test. I was able to pull 0.1 as well but there was no “clearance”
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I spent last 2 days tweaking profile for CF-PETG and now starting to re-print all printer parts in carbon. They came out absolutely gorgeous! One thing I might want to tweak is a bang-bang bed heating. I think horizontal rippling in sides that I did not see on PLA is from the bed temp variations
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Ooooh weee that looks real nice!
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I need to reprint all the core components in PETG now so that I can get back to trying to print ASA again.
Yeah and carbon adds stiffness. I probably will redesign some parts to be millable in aluminum, too
Right after printing core, I figured my left belt got loose, probably skipping a tooth where belt is mounted in a PLA core from high temps. I fixed that and now printing the shroud without horizontal marks.
Update: happened again, PLA core did not stand to PETG temps
What is the best way to insert belts into the core?
Don’t know what best way is, but here’s what I did https://azab2c.com/make?s=belt&v=2_1&t=30_14_31, reduce playback speed if you want to hear my ramblings.