First Time Doing Belt Tuning... Looking For Guidance

I think I need to tighten the lower belt. Is this correct?
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10 Replies
Jeb Bush
Jeb BushOP3w ago
ok so i think belts are OK as far as tension but i definitely neglected to check on length so I'm guessing thats the issues with the differences at 92ish Hz and 130ish hz. i think I have some issue with my toolhead causing the peak at 50Hz because I hear something gross rattling around in it at that part of the test.
lingo124
lingo1243w ago
Does it sound like the balls inside the linear rail carriage? I am also trying to diagnose an annoying sound from my toolhead around that frequency (45-60Hz ish) and theres nothing else loose on my toolhead. For me it sounds almost like the sound when i move the toolhead by hand; its a faint rattling sound as it slides.
Jeb Bush
Jeb BushOP3w ago
Maybe. I haven’t dug into it further yet
DapperDangus
DapperDangus3w ago
You guys have the filament sensor?
lingo124
lingo1243w ago
I have yes
DapperDangus
DapperDangus3w ago
There’s a little ball that triggers the runout sensor. It will rattle like crazy without any filament. I personally run my shapers with filament installed. I’m unsure of why they tell you to remove it as you’ll be printing with filament so I would think you’d want IS to see it. But I’m fairly new to this so can’t comment much further on that. Your graph should look a bit like this though. https://discord.com/channels/582187371529764864/1283107378014851112/1283355021723041832 I believe you need to tighten both up a little more. When you get close like that link I showed you, reduce your tightening/loosening down to like 5minutes on a clock face worth. The jumping around 125 is fairly normal. Yours is a bit magnified though as your belts are a little floppy.
Jeb Bush
Jeb BushOP3w ago
yeah i have the filament sensor and have filament installed so i dont think thats it. The rattling seems to be coming from lower like the hot end or carriage but i still need to poke around a bit more
DapperDangus
DapperDangus3w ago
Ahh damn… Not sure if you tried it but there is a frequency analyzer tool where you can make the toolhead stay at the frequency you are hearing the noise at. Helps to isolate exactly where the sound is coming from.
Jeb Bush
Jeb BushOP3w ago
Yeah I need to dive into that a bit more. I’ve been chasing other gremlins like crappy usb c connectors coming loose during a 2 day print Probably related to these vibrations
DapperDangus
DapperDangus3w ago
Yeah I was heavily looking into using the can instead of usb for a bit just so I could get the extra security of the clip but mine ended up being ok.

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