OldKingHamlet
RRCRat Rig Community [Unofficial]
•Created by WrinklySackNick on 12/23/2024 in #fix-my-resonance
Y accel wont go above 2000 - vcore 3.1 with toolhead
Are you running the new input shaper routine where the head travels an inch or so in an oscillating pattern, on just x or y, when running input shaping?
I have a 3.1/Toolhead1/custom beacon mount,and I'm seeing a similar peakiness and noise starting at 100hz and up, which wasn't shown before the new os routines.
The old input shaping routing gave me 8.5k accel on y with belt tension tuned in. Now I'm seeing a similar oddity and sub 3k accel recommendation on y.
Just to be sure I'm going to rebuild the x/y motion system and see if the problem persists.
Noise bursts around 100hz are usually attributed to loose parts on the Toolhead, but I also once had a mis-tightened t nut on one of the y rails generate some harmonic buzz around the 130hz range.
9 replies
RRCRat Rig Community [Unofficial]
•Created by DikkieKlijn on 10/14/2024 in #fix-my-resonance
Custom VC3 input shaping interpretation
JFC, a y accel of 13.6k on a 400? With 0% vibration and .05sm on mzv. I'd say you're done. I have 9k on a 300 and that's pretty good.
I wouldn't touch anything but give weekly belt tension checks while the belt breaks in.
I'd also test against heat soaked conditions, just to be sure.
3 replies
RRCRat Rig Community [Unofficial]
•Created by dickpoop on 11/9/2024 in #fix-my-resonance
V4 500 Hybrid second Y resonance peak?
For me, with a toolhead 1.0 on a V-Core 3.1 (so kinda similar to yours), I didn't have the Toolhead properly tightened across all of its bolts (specifically the countersunk ones that went through the plate to the printed parts), and my belts were a little loose.
3 replies
RRCRat Rig Community [Unofficial]
•Created by OldKingHamlet on 9/6/2024 in #fix-my-resonance
"Oh, my V-Core 3.1 is working almost perfectly. I'll make it even better" then this
Ah, probably. I was inspecting it, and I think my right rear assembly has some twist or other inflection in it. Best thing to do at this point might be to take the whole corner completely down and rebuild it.
6 replies
RRCRat Rig Community [Unofficial]
•Created by OldKingHamlet on 8/8/2024 in #fix-my-mesh
Beacon scan exposed waves in sheet/plate
It was the cheap sheet. I got a Rat Rig branded one from them, and the ripples are completely gone. Also, the waves would inverse if I turned the sheet over, or rotate with the sheet if I rotated it on the bed.
8 replies
RRCRat Rig Community [Unofficial]
•Created by MFBS on 8/27/2024 in #fix-my-resonance
No matter what I do I can not get rid of the third hump
So, I fixed mine. The rail carriages that were on my vc3, particularly the x rail, were failing. I replaced the rails with some new ones that had some preload on the carriages. I'm assuming the prior owner of mine had a few crashes and/or other z-axis sins. I just replaced the rails and carriages in one go, and now my resonances are clean af
*Edit: Mostly. I decided to "fix" some other things and now my lower belt is binding due to some path alignment issues. But at least the gigantic wall of resonance noise is gone.
75 replies
RRCRat Rig Community [Unofficial]
•Created by MFBS on 8/27/2024 in #fix-my-resonance
No matter what I do I can not get rid of the third hump
This... is almost the exact issue I'm troubleshooting through. Went from perfect/clean two humps to chaos. Granted, I had the frame get strongly hit during a workplace shuffle, replaced the toolhead with the RRTH, and installed a light weight gantry, so there were a lot of changes. I'm actually thinking the rails that were on this printer (I bought this RR used, and it was originally an early V-Core 3) had given up the ghost, so I've got a set of new y and x rails on the way.
I had spotted gantry twists being reported in the beacon calibrate process, but only along the back (0.05mm), which incidentally aligns with the umbilical's spring wire pushing the head to rotate forward/over the gantry, and towards the plate. I'm also getting a weird metallic buzz during belt tension testing that comes from the toolhead, but is completely unexplained by extruder gears, loose pieces, or anything else that could rattle. I'm now actually thinking the bearings in the x carriage, and since there's some other evidence of a strong gantry collision at one point. If the cowling for the bearings that keep them in place was damaged, that could explain it some of it, especially now that the much lighter RRTH is installed.
75 replies
RRCRat Rig Community [Unofficial]
•Created by OldKingHamlet on 8/8/2024 in #fix-my-mesh
Beacon scan exposed waves in sheet/plate
If anyone stumbles on this: Consider this a lesson in buying cheap sheets of Amazon. Ripples went away after swapping the plate out, and this issue was never exposed until Beacon and being able to casually run a 25x25 grid :p
8 replies
RRCRat Rig Community [Unofficial]
•Created by OldKingHamlet on 8/8/2024 in #fix-my-mesh
Beacon scan exposed waves in sheet/plate
8 replies
RRCRat Rig Community [Unofficial]
•Created by OldKingHamlet on 6/9/2024 in #fix-my-printer
The hell is this clicking?
Update: rebuilt the bearing stack twice. Once with old, once with new bearings. No improvement. So took the whole damn corner apart, realigned everything, and still happened. The only thing I had not done was replace the stepper, so I got a replacement 2504ac, and that resolved it. Maybe the shaft had a little bit of play and it would allow for the belt to go at an angle through the stacks?
7 replies
RRCRat Rig Community [Unofficial]
•Created by OldKingHamlet on 6/9/2024 in #fix-my-printer
The hell is this clicking?
Yeah, it's hard to hear with the rest of the noise via video, but it's very audible in person.
I'll give it some more fussing. I basically took apart the whole motor and bearing stacks yesterday, relubed them with boeshield. Guess I'll triple check my work then 😭
7 replies
RRCRat Rig Community [Unofficial]
•Created by Jack is NOT tech Support on 5/16/2024 in #fix-my-printer
fans staying constantly on
Ah. Well, my hotend fan is 2pin and it's always at 100%, which I'm fine with. My 4028, for part cooling, is connected via 3 pin PWM and needed to get the ! put in the printer.cfg as linked above.
7 replies
RRCRat Rig Community [Unofficial]
•Created by Jack is NOT tech Support on 5/16/2024 in #fix-my-printer
fans staying constantly on
Are they both pwm? You may need to invert the control signal.
7 replies
RRCRat Rig Community [Unofficial]
•Created by ADSRMedia on 4/24/2024 in #fix-my-printer
Strange smell after enabling performance mode on steppers
Makes sense the fuse didn't blow: It doesn't look like current overdraw, but an arc fault issue. The other joyful cause of house fires. The hot lead on the AC wiring looks like it might have been loose (either internally in the switch or on the paddle of the connector) and over time, it degraded itself more and more. Could have arced just a little bit each time it was turned on. Running the steppers slightly higher may have just accelerated the process a little bit (if it was a loose connector and not a bad switch), but I think it was something already in progress and the stepper change made you more sensitive. So count yourself lucky.
Also, thanks: I'm here cause I got a used Rat Rig off someone, and I was not incredibly happy with the AC line but haven't prioritized it. I'm thinking I should now. I have my printer in my garage, and my garage is GFCI only, which would not prevent this either 😑
21 replies
RRCRat Rig Community [Unofficial]
•Created by EODesigns on 5/6/2024 in #fix-my-mesh
VC3.1 Enclosed 400 Back Corner Peak
GL! I'm now in the <0.15mm total variance range, and the last bit is totally fixable but not sure it's fully worth messing anything up :p
16 replies
RRCRat Rig Community [Unofficial]
•Created by EODesigns on 5/6/2024 in #fix-my-mesh
VC3.1 Enclosed 400 Back Corner Peak
I ran into this issue myself. For me, the fix was making sure the back/center 3030 was straight/centered, and that the linear rail was straight on the extrusion. It's a total pain to adjust, cause if it's tight on the electronics panel, it can be fiddily to move and get aligned; It has to be well squared in x, and z. And the Z1 rear motor bracket can be part of the issue too, and to adjust that, you have to drop the Z1 motor 😩
I know it's in the "you should fuss with the front" range, but every adjustment in the front put something else out of line. Straightening the back center rod was the only thing that helped me get the mesh to behave.
16 replies
RRCRat Rig Community [Unofficial]
•Created by OldKingHamlet on 5/8/2024 in #fix-my-mesh
Bed Mesh taco with some obvious inflection from alignment
Thanks.. I'll give a pass 1 mil tape and see. Can't ctrl-z life, so if I tweak the frame the wrong way, I'll lose another afternoon of my life doing meshes.
May not hurt to get a sheet too, cause the one that came with it is as beat up. Or just not worry. Running it to 80c pulled the variance down to .120 after just 10m of preheating
10 replies
RRCRat Rig Community [Unofficial]
•Created by OldKingHamlet on 5/8/2024 in #fix-my-mesh
Bed Mesh taco with some obvious inflection from alignment
10 replies
RRCRat Rig Community [Unofficial]
•Created by OldKingHamlet on 5/8/2024 in #fix-my-mesh
Bed Mesh taco with some obvious inflection from alignment
To note: I did get the frame super square at one point: <0.08 total bed mesh variance at one point. I got that by taking it down to no axes and no upper connectors, sat down with a huge AF square I have and making sure it was perfect. Then realigned the bottom. THEN double checked the top and tweaked from there.
But then the enclosure panels didn't quite fit right after I rebuilt everything else, and I (wrongly) assumed that if the rest was tight, I could slightly adjust the corners to help the acrylic fit. Nope, Must have introduced some twist from frame tension that pulled things out of square.
Frankly, I really don't like the 1.0 enclosure, but with kids and cats round, and the speed that this thing can run at, I'd rather run my head figuratively into a wall than literally have an ER visit.
10 replies
RRCRat Rig Community [Unofficial]
•Created by OldKingHamlet on 4/23/2024 in #fix-my-printer
Clicking noise on x/y axis travel
Yeah, will do that too. Seems simple enough to check: rotate the bed 180 degrees and see what happens :p
8 replies