wavy corners
this print (after rebuilding my VCore 3.1 300) has some issues. My question is about the wavy corners.
Input Shaper is tuned. I have this with all filaments, no matter fan or temp settings - so probably no pressure advance problem. This is the 3Do Ratrig green ASA filament with the ootb SuperSlicer settings.
What can I look out for?
34 Replies
other-emerald•2y ago
does this happen with all prints? If you print a tall hollow cylinder what does it look like. (Looks like bad ZWobble to me)
eastern-cyan•2y ago
all prints. I'll make a cylinder to test. is 1cm radius fine for this?
other-emerald•2y ago
something like this https://www.thingiverse.com/thing:2134978
Z Wobble Test Piece by tuxcat
Test piece to check the Z wobble banding from your printer.
Added a square version.
other-emerald•2y ago
that will confirm, but it likely is zwobble, you'll want to check your lead screws, bed arms, oldham couplers and z couplers for binding and/or crazy misalignment. For the z couplers make sure you first secure to the stepper, then secure, with the bed installed, the lead screws - you want it pretty tight (but don't hulk so much to destroy the screw) and make sure they are all the way in
eastern-cyan•2y ago
clearly wobble... (ignore the seam, I tried a too high PA setting for this one).
lead screws seem fine when I roll them on a flat surface. they seem to move as needed within the oldham couplers.
But I removed the first arm now to be sure and the oldham coupler feels a little bit "scratchy". hm
eastern-cyan•2y ago
could it make sense to grease the lead screws a bit?
other-emerald•2y ago
I’d check for anything mechanical, like binding or a “bent” lead screw
Just checking, where are the seams on this print?
eastern-cyan•2y ago
these are the seams that are also shown in superslicer. A bit much compared to earlier. But I believe these things have nothing to do with each other, as the wobble is there for a while and I haven't tuned for this filament yet.
I'll check the rails for perfect seating next. maybe when assembling I made a mistake here.
the lead screws don't look bent. I rolled each of the three on a flat surface. one was super smooth, the other two looked smooth as well, only wobbled back a tin bit when they stopped
Have you actually lubricated them?
eastern-cyan•2y ago
yes. it got a little bit better, but I don't see an issue with the lead screws. I'm quite sure they're fine.
I rebuilt my vcore in order to make sure there are no geometric issues after I had changed from the non-enclosed to the enclosed variant. Maybe the rails aren't perfectly aligned, but I still have to figure out a good way to verify the geometrical accuracy.
I realigned the rear z-axis and it seems a bit better. I'll do the front rails tomorrow. I already see a slight improvement, will now print the voron cube again to get a better comparison
huge overextrusion + bad PA tuning, is what it looks like to me. (it's close to impossible to provoke z-wobble this bad on a V-Core 3, no matter what you do).
Are you using a huge nozzle here?
eastern-cyan•2y ago
I am using this one: Phaetus PH Volcano hardened steel nozzle (DLC coating) - Diameter: 0.6mm
will do some proper PA tuning tomorrow as well. hope that helps. my extrusion is at 0.93 for 3DO Ratrig green ASA
but I had this issue already before, with a Microswiss plated brass 0.6
can't remember if the issue was there already when I was using the Pheatus UHF 0.6 which I replaced with a CHC Pro. This one by the way - despite of several PID tunings - overshoots when heating up by 6 - 10 °C, and while printing is between 244 and 246°C when 245 is set.
Are you using a pt1000 by any chance? I found my pt1000 would vary a lot until I plugged it into the standard thermistor port instead of the dedicated MAX chip port
Which extruder?
eastern-cyan•2y ago
I am using the ATC Semitec 104GT-2/104NT-4-R025H42G that's part of the CHC pro. Which reminds me to check wether I have set it.
the extruder is an Orbiter 2.0
Board? Toolboard? v2.X?
eastern-cyan•2y ago
@miklschmidt your assumption about over extrusion was right by the way. I lowered it to 0.90 now and the layers look much better
Board is an Octopus 1.1, and an EBB36
Yeah i think i run 0.91 for 3do ASA myself.
Aight then what i had in mind is not the issue at least (the reason i asked) 🙂
there's a bug in 2.x using the skr mini e3 and a toolboard, that was fixed late yesterday
eastern-cyan•2y ago
I might even go to 0.88 I think. will try with the next print. but it's 1 AM here, so probably will go to bed first 😉
I have updated RatOS and all other components feww hours ago
there have been 3 or so commits for RatOS
Required manual changes to the template (needed a different quirks file, grrrr.. stupid skr mini).
But it's a different thing, you should be fine.
eastern-cyan•2y ago
can I assume the same extrusion factor for different colours of 3do filament or better not?
Seems to work well for the black ASA as well at least, but that's as much as i know
eastern-cyan•2y ago
alright, I will find out
thanks for your help!
Np!
Nozzle diameter and line width correct?
Also in klipper?
Also check your 4 bed screws
And tighten them when hot
The Asa bed temp can make them loose and wobbly
eastern-cyan•2y ago
diameter is set to 0.6, which is my nozzle. Here are the extrusion settings:
eastern-cyan•2y ago
eastern-cyan•2y ago
4?
yes
sorry, 3
the ones that rest on the arms
eastern-cyan•2y ago
lol, you had me confused. I was counting again and again and only came to three 
you think the extrusion settings are fine?
you think the extrusion settings are fine?I prefer a bit wider lines
but this shouldn't cause the issue
eastern-cyan•2y ago
I still have to figure out how to verify the frame and especially gantry geometry precisely, that's my next step
roughly it looks good
what are your settings?
3D Printers & a Whiteboard
YouTube
RatRig V-Core 3: How to Get a Square Frame
This video is for those who struggle getting bed meshed with their RatRig V-Core 3.
Please feel free to jump to the chapter you are interested in.
0:00 Intro
1:05 about the v-core 3 frame and bed leveling
8:26 what to take care of in the building phase
9:17 the right square
10:09 build tips
16:50 adjusting the frame according to your bed mesh
...