You can also move the center point by altering the calibration values. I don't know what exactly you

You can also move the center point by altering the calibration values. I don't know what exactly you want to achieve, but I'm confident that it can somehow be achieved with the configurator.

Nnubbins what I have is just a tube of superlube 92003. It's advertised as silicone lubri...

HiobOP•7/5/24, 7:51 AM

You have new belts and pulley incoming anyway - so I would give it a try if I was you.

Wwalmis if it's silicone based then ok. Don't worry, with the correct tension lube would...

nubbins•7/5/24, 8:03 AM

I put some on the pulley and spread it around a bit. Didn't make any difference.

Nnubbins I put some on the pulley and spread it around a bit. Didn't make any difference.

HiobOP•7/5/24, 8:04 AM

Just a thought - how much current draw does the motor show when the grinding occurs?

walmis•7/5/24, 8:05 AM

From the video, it definitely sounds like a belt/pulley meshing

HHiob Just a thought - how much current draw does the motor show when the grinding occ...

nubbins•7/5/24, 8:05 AM

curr_x and curr_y?

Wwalmis From the video, it definitely sounds like a belt/pulley meshing

nubbins•7/5/24, 8:07 AM

that is the idea, but I'm not sure where I would go from there. To a different tooth # motor pulley? I'm just following what @Subsonic (Protomaker) 's guide prescribes. afaik no one else following that guide has dealt with this before. The other gimbal creaking type issues I can find plenty of troubleshooting solutions for, but not this belt issue

Nnubbins that is the idea, but I'm not sure where I would go from there. To a different t...

walmis•7/5/24, 8:08 AM

As a last ditch effort I can supply you an original Rhino pulley

Wwalmis As a last ditch effort I can supply you an original Rhino pulley

nubbins•7/5/24, 8:09 AM

could you just send me a spec page/size spec for it? just to double check

HHiob Just a thought - how much current draw does the motor show when the grinding occ...

nubbins•7/5/24, 8:10 AM

curr_y goes up to about 17A at max deflection, + and - in either direction, no weird behaviour

Nnubbins curr_y goes up to about 17A at max deflection, + and - in either direction, no w...

HiobOP•7/5/24, 8:11 AM

then you are certainly not overstressing the Rhino.

HHiob then you are certainly not overstressing the Rhino.

nubbins•7/5/24, 8:12 AM

yes, on walmis' recommendation earlier I tried turning the motor+pulley by itself and everything was smooth

nubbins•7/5/24, 8:13 AM

might be gimbal related as well since I know this one is particularly bad and it's going to be rebuilt with some new parts next week. Might not be out of the question that vibrations are starting inside and traveling out to the belt via 74t pulley

HiobOP•7/5/24, 8:13 AM

Sorry, if this is a dumb question, or was answered earlier - are you 100% positive that you have the right belt and pulley specs? regarding tooth profile and so on?

nubbins•7/5/24, 8:13 AM

it is most significant at the belt but that makes sense

HHiob Sorry, if this is a dumb question, or was answered earlier - are you 100% positi...

nubbins•7/5/24, 8:13 AM

yes, I've double checked with the guide, other people who built, and david's own rhino

nubbins•7/5/24, 8:13 AM

74t pulley, motor pulley and belt spec are correct, I now have 4 motor pulleys i've mix n matched at will

HiobOP•7/5/24, 8:14 AM

HTD5 on both sides?

nubbins•7/5/24, 8:14 AM

yes

HiobOP•7/5/24, 8:14 AM

ok! sorry - better safe than sorry

Nnubbins could you just send me a spec page/size spec for it? just to double check

walmis•7/5/24, 8:14 AM

We machine those pulleys in-house, it's based on the HTD5M spec

Wwalmis We machine those pulleys in-house, it's based on the HTD5M spec

nubbins•7/5/24, 8:15 AM

15mm width, 12 tooth, 8mm bore? well, width depending on the belt of course

walmis•7/5/24, 8:15 AM

official Rhino belts are 10mm, 12T pulleys

Nnubbins 15mm width, 12 tooth, 8mm bore? well, width depending on the belt of course

HiobOP•7/5/24, 8:15 AM

that's what I use.

HiobOP•7/5/24, 8:16 AM

Yeah, but it shouldn't make a difference.

HiobOP•7/5/24, 8:16 AM

(the width I mean - as long both gears are the same size)

walmis•7/5/24, 8:16 AM

nubbins•7/5/24, 8:21 AM

@Hiob before you installed the gimbal in the enclosure, did the oval-shaped X and Y gimbal frames rotate freely and smoothly around the grip connector?

nubbins•7/5/24, 8:21 AM

I think mine was overtightened. My gimbal frames barely moved at all, took a lot of force to rotate them

nubbins•7/5/24, 8:22 AM

ie. the main nut, sitting all the way down in the core of the grip connector

Nnubbins @Hiob before you installed the gimbal in the enclosure, did the oval-shaped X an...

HiobOP•7/5/24, 8:25 AM

Yes and no - there is a bit of a "round edge" when you try to deflect both axis at the same time. This is a geometrical thing due to how the gimbal works. Once you add an extension and grip this (very small) hump isn't there anymore (or can't be felt anymore). The inner oart of the stick connector needs o rotate slightly inside the outer part and also needs to move up and down (very very slightly) - that is what the flexible TPU part is for. A bit like a spinal disc. But without any weight and leverage, it can be felt.

Nnubbins I think mine was overtightened. My gimbal frames barely moved at all, took a lot...

HiobOP•7/5/24, 8:26 AM

That your gimbal was hard to rotate isn't right though

HiobOP•7/5/24, 8:26 AM

It should move easily.

HiobOP•7/5/24, 8:27 AM

Perhaps the bearings weren't properly seated?

HHiob Yes and no - there is a bit of a "round edge" when you try to deflect both axis ...

nubbins•7/5/24, 8:27 AM

yes, it's that second type of rotation that I mean. Was it smooth? Or did it take a lot of force
I took a picture on day 1 and X/Y frames were slightly crooked, which had me a bit concerned not because it was crooked, but because it was very hard to rotate to get aligned again

nubbins•7/5/24, 8:27 AM

it did not feel like there was a bearing in there at all. More like just a screw and nut.

HiobOP•7/5/24, 8:27 AM

"A lot of force" - certainly not!

nubbins•7/5/24, 8:27 AM

Which I now understand looking at the subsonic guide that there are back to back flanged bearings in there

nubbins•7/5/24, 8:28 AM

I suppose if it was assembled like that, then two weeks of use under high spring force might have broken something

nubbins•7/5/24, 8:28 AM

since yesterday i've loosened the nut a bit, but it seems to be too late

HiobOP•7/5/24, 8:28 AM

I'm thinking more of the big bearings that hold the main gimbal frames.

HHiob I'm thinking more of the big bearings that hold the main gimbal frames.

nubbins•7/5/24, 8:29 AM

the big outer 6808s? hmmm they are still pretty smooth but i'll check next week

HiobOP•7/5/24, 8:29 AM

If those aren't perfectly seated - aka not perpendicular to the axis of rotation, it could make the whole assemble get stuck

HiobOP•7/5/24, 8:31 AM

To give you an idea - When I disassembled the gimbal to change the stick connector to my "stubby" version - after reassembling and only the 80mm grip connector as a "lever" - without belts attached, the gimbal moved freely and buttery smooth in every direction.

HHiob To give you an idea - When I disassembled the gimbal to change the stick connect...

nubbins•7/5/24, 8:34 AM

with no belts attached, the gimbal has always been pretty smooth in linear x and y motion, no issues with the 6808 bearings there

nubbins•7/5/24, 8:34 AM

but with circular motion it has always had some issues with internal creaking that can be felt all the way up the grip

nubbins•7/5/24, 8:34 AM

probably at the beginning due to the grossly overtightened nut, maybe now due to internal damage

nubbins•7/5/24, 8:35 AM

oh well........the belts weren't expensive, at least

HiobOP•7/5/24, 8:38 AM

You shouldn't overthighten the central bolt that connects the two core parts. I would even argue, that the bolt doesn't need to be fixated in the outer part at all - but I haven't tried that yet.

HHiob You shouldn't overthighten the central bolt that connects the two core parts. I ...

nubbins•7/5/24, 8:39 AM

i'll certainly keep that in mind for the gimbal rebuild

nubbins•7/5/24, 8:39 AM

would honestly be helpful if there was a guide out there for how tight the main screws need to be

You can also move the center point by altering the calibration values. I don't know what exactly you

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