Absolutely horrible frequency response
I have no idea what's causing this mess. My motor skips at >5000 accel btw. I've re-aligned the gantry like 5 times now
18 Replies
i think my belt is still slightly angled
i have no idea how to fix it
all the shims are there
my belt is not even centered on the closest idler to the printhead, it runs to the bottom of it
i've since re-aligned and changed my shims out for precision shims (had diff dimensions previously for the shims)
my X looks semi-decent
Y looks attrocious
what's the peak at <20 ?
I think your wire loom causes a lot of the noise in the resonances. Especially since the ethernet cable isn't really restrained and will resonate through to the ADXL quite a bit during movements
i will add a few more cable ties
any idea on what this could be ?
it looks like binding right ?
low frequency resonance is generally binding or so i've heard
i will remove the spool and check
It could be part of wire loom issues as well. Binding (except when its really horrible) you generally won't detect using resonance detection, since the carriage doesn't move enough for that.
You can more easily detect binding manually though, by simply moving the carriage gently by hand and feeling if it binds anywhere
genetic-orange•9mo ago
Looking at your gantry I see some rust on your bearings. Make sure you have smooth and clean motion system.
It's not rust, it's from the belts unfortunately
there should't be any rub of in the middle of the bearings. Are they turning easily? Did you put some lube between them?
didn't lube them
i have grease that i can try
where should i use it ? on the front face of the bearing or the inner face
lithium grease
do you mean betwen the stacks ?
the bearings do turn easily when the belt is not tensioned
once they're tensioned i cant move them
i lube between each bearing. not much, but some is always good. not on the sides that face the belts
there's this rubbery deposit on my bearings
debris on the bearings means the belts are rubbing on them and not turning them
hmm
i'll loosen all the stacks
i hope that helps
i even have 7.5x5x1 precision shims that are even better than 8x5x1
less chances of clamping