Gunfighter grinding please help.

[Light_has_come]

Hi there,

I changed the springs in my gunfighter mk III for the first time today and it was easy and straightforward. However, when I put it back together again there was a grinding sensation when I moved the stick. I opened it up to see if I had done anything wrong and I hadn't. The grinding sensation was coming from the actual bearings themselves. After I disconnected the springs I spun the bearings with my fingers I could still feel the grinding with my fingers. I have used my gunfighter for less than 5 hours at this point.

Please help.

[fallout9]

It should be something else, you can't hear the ball bearings grinding. If a ball bearing would be broken you would feel the grip moving in short stages and not in a fluid move, but no grinding.
Have you installed the springs on the same cam back to back so they don't bite into each other when moving? Are they sitting properly on the channels? Do they have the sleeves on?
Is the bolt securing the cam tighten enough so the cam moves together with the bolt, nut, washers and inner cylinder of the ball bearing without pressing into the bearing? The nut should be tight enough to make the listed components move together like a single unit, but not to restrict movement by pressing into the ball bearing.
Is the guiding ball bearing staying inside of the cam during whole cam travel?

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I may have poorly described my issue. I don't hear any noises but the movement feels bumpy. At first I was absolutely certain there was a piece of dirt in there somewhere. I double checked everything you suggested and it is as it should be. Only a single spring is installed on each axis with the sleeve on with the fat part facing out. The nuts are tight and the parts you listed move as a single unit.

I tried loosening and tightening the nut on the bearing but it was still bumpy. Even when I remove the springs and spin the bearing with my finger it feels bumpy and scratchy like there's sand or something in there. However, I've been working in a clean environment and I don't see how that would be possible.

[Light_has_come]

I don't know anything about ball bearings but could it be a lubrication problem? I have some nyogel 767a but I don't want to go putting anything in or on something I don't understand.

[fallout9]

Nyogel 767a is dampening grease and won't help at all. You need some fine lubricant for the small ball bearings. But I'm sure it's not the case.
Make a test: download this tester: https://vkbcontrollers.com/wp-content/u ... Tester.zip, move your grip back and forth and see the curve - is it smooth? Then it's fine. Is it rugged? Segmented? Jagged? Then there's a problem.

[Light_has_come]

Hi there, I ran the test and no problems.

I've also discovered the that problem is only on the horizontal axis not on the vertical. And that it is mostly when crossing over from left to right. I tried using a different spring of the same strength but the problem persisted. I also tried tightening the screw on both the bearing and the cam. What next?

[fallout9]

Have you tried with other set of cams?

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Ok so I re read your previous post and looked around inside to make sure everything was moving as you said it should be. The only differences I can see between the horizontal mechanism and the vertical mechanism (which is working) is that with no spring attached the vertical cam swings and moves smoothly but the horizontal one is quite bumpy and non-smooth. It does it regardless of how much I tighten or loosen the cam screw. I also noticed the the vertical has two washers, one on each side of the frame. But the horizontal only has one between the nut and cam and none between the frame.

I also realized that I don't think I properly understood this sentence you wrote.

"Is the bolt securing the cam tighten enough so the cam moves together with the bolt, nut, washers and inner cylinder of the ball bearing without pressing into the bearing? The nut should be tight enough to make the listed components move together like a single unit, but not to restrict movement by pressing into the ball bearing"

Is the hole where the cam screw goes through a ball bearing? I was under the impression that that was just a hole that the screw went through and spun inside. As near as I can make out neither of those bearings is moving and the screw is just spinning inside the hole. But I'm having a hard time telling.

[Light_has_come]

Have you tried with other set of cams?

Yes I did, I tried using a space cam soft. I also tried switching over the vertical cam and screw into the horizontal slot. Although I didn't put it all back together again to test with the stick, the cam definitely didn't move smoothly in that hole.

[Light_has_come]

I fully tested with space cams. Same problem on the horizontal except now it also makes a sound when crossing center.

[fallout9]

I also realized that I don't think I properly understood this sentence you wrote.

"Is the bolt securing the cam tighten enough so the cam moves together with the bolt, nut, washers and inner cylinder of the ball bearing without pressing into the bearing? The nut should be tight enough to make the listed components move together like a single unit, but not to restrict movement by pressing into the ball bearing"

Is the hole where the cam screw goes through a ball bearing? I was under the impression that that was just a hole that the screw went through and spun inside. As near as I can make out neither of those bearings is moving and the screw is just spinning inside the hole. But I'm having a hard time telling.

It's important that the screw is not spinning inside the inner cylinder of the ball bearing. The nut has to be tight enough to engage the inner cylinder in the move. Same with the cam - if it spins around the screw it's bad. That's why I'm saying that the screw, the washers, the nut, the cam and the inner cylinder have to move all in unison.

[Ron61]

Photos will be better than any words.

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I don't think the inner cylinder is moving smoothly with the cam. This is a video I took of the movement of the cam without any spring attached. It is stiff and jerky. https://photos.app.goo.gl/yma9FkDfDQ1dNJeK6 . I had a friend look at it and he said it feels like some part of the bolt or cam is rubbing against the outer part of be the bearing. When there's no cam or bolt inside the bearing, the inner cylinder of the bearing seems to rotate freely. I tried tightening the nut both extremely tight and mediumly tight.

It is also hard to tell if the inner cylinder is moving with the cam and bolt because the screw head obscures the vision on the one side.

[fallout9]

I could tell by just looking at the video that you tightened it too much. You don't have to see the inner cylinder moving, if the other parts move together means it's all good. But loosen that nut a bit.

[Light_has_come]

Even if I loosen the nut all the almost all the way it still moves like it does in the video. The other axis has no such problem even when much tighter.