VC500 3.1 Long Standing Issues
Hello, my printer hasn't worked in nearly 6 months and I don't know how to fix it.
It is a VCore 500 3.1-ish. The following modifications have been made:
- Swapped to VC4 motor mounts.
- Using different joiners and a top mounted rail (but the problem persisted with the old joiners and Y-rail location)
- Using a frame mounted tensioner
- Using a toolhead of my own design with a Beacon probe. (But problem existed when using the rr toolhead with Beacon probe)
- No enclosure.
I've been working on this for so long, I don't even know what to try next. I think there's something fundamentally wrong with the printer. I've nearly given up hope that this will ever work
These are the most recent input shaper graphs, but I've got dozens.
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gonna try posting shaper graphs as I test as something of a "log", or if anyone can figure out the idiocy i'm trapped in
I believe these are as loose as I can make them
Increasing the tension by an entire turn on each tensioner
the scale on the frequency comparison has shot up. I believe it was too loose before but is now too tight
X and Y are dramatically worse
loosened a half turn on each
still 1e6 on the comparison chart. I don't think relative tension is correct right now, but I don't think that's the issue either (yet)
Testing turning the motors off, rehoming, then re generating the graphs. I have not been doing so between tension changes. I do not think this will produce a change, but the thought occurs
No meaningful change
But it is slightly different
loosen quarter turn
i dont think i'm at a point where tensions matter that much. there is an underlying issue that I cannot find
Adjusting the screws on the side of the y rail carts. Both making them loose and then making them tight produced no meaningful change
i think i need to break the threadlocker I just put on the other day to test the joiner-cart screws.
but that takes 24 hours to cure when I reapply....
Tightening the screws binding the joiner plates to the rail carts as hard as i can with a single finger,
Loosened each plate-cart screw half a turn. None currently feel loose (ie, wiggles to the touch)
This is a different result, technically
Loosened each plate-cart screw an additional half turn. None currently feel loose (ie, wiggles to the touch)
This too is a different result. X shouldn't change much because I'm only touching the y rails now
Loosened each plate-cart screw an additional half turn. One currently feels loose (ie, wiggles to the touch)
Tightened the one loose plate-cart screw as tight as it can go with a finger
Completely removed the loose plate-cart screw. It may be that the threadlocker on that screw has been broken in this test and thus it will now either be loose and wobbly OR tight enough to interfere with the cart
is this... progress?
I think I need to disassemble my toolhead to loosen the screws on the x rail. but it's been 6 hours i would like to not be doing this
No, incorrect. I didn't notice that the plate screws were loosened enough that the entire y rail could be lifted a mm or two
Loosening all four screws on the x rail by half a turn
what a dreadful thing to have to test again
Loosening the screws on the x rail cart by an additional half turn
the entire toolhead can be wiggled on the cart now. I suspect the x cart screws are too loose. re tightening half a turn before investigating specific vibrations using the resonance analysis
the results of that re tightening
they're way worse than before, I suspect I missed something
I'm gonna try threadlocker and return in a few hours
Post threadlocker
I did notice a bit of belt folded inward, rubbing against the extrusion. I don't think that is leading to issue but I dont think that should be left untended
Tiny improvement after securing the belt ends
Loosen each belt by half a turn
trying adjusting the screws connecting the lgx pro to the baseplate
Swapped out the baseplate with a new one. It's only pla but it grabs the extruder by the sides and not the bottom
I have realized that posting every change in here makes it easier to compare graphs even if this is not useful to anyone. But it does mean I can show my due dilligence
replaced the previous toolhead baseplate with a new one that grips the motor by the sides. progress?
I tightened each belt by have a turn. Un-progress?
Loosened each belt by a half turn. this seems not better,
but tension may not be the issue
I had previously removed the cpap hose to see if that was a source of the issue (it was not). I shortened the hose and just now put it back into place
did more adjustment on the loom itself. I dont think that's the primary source of the problem but moving something around seemed to help the manual checks
what the fuck is that plateau on the x chart lol. how did i do that
how are you round
starting over tensioning from the top. as loose as I can make them
Turning each belt a full turn tighter
Additional full turn tighter
half turn tighter
Made a change in the tool head design where the duct met the baseplate. That may have been a source of vibration contact
I was incorrect
back at it again. this is just the pla version of the toolhead to see if decent graphs are possible. starting with a baseline
Forgot to add filament and tighten the tension leaver
I wonder if I over tightned the screws on the x rail cart. I'll test that after trying belt tensions because that's much harder to reach
The camera was loud at y:125hz. So I removed it
Attempting something different with this set up. Rather than trying to get loctite just right, I have some spring washers
??? it helped?
Also added the spring washers to the joiner plates, which was why I originally got them. No big change
I noticed that with the washers, the screws on the x cart were proud. So I replaced them with shorter, button cap screws instead of regular cap screws.
in doing so I realize that the extruder can be pushed up a little bit when fully screwed in. I may need to pause to solve that problem
also the shorter screws seem to have made it worse in Y question mark
I KNOW my belts are too loose and need to undo the clip to manually tighten them. but i wanted a starting point
i might also need longer mounting screws :pensivecowboy: