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AnnaVela

Wheel head wobble (pulley)

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I’m trying to figure out my Speedball Clay boss wheel. I bought it second hand and worked for a few months on it. Recently it started to bounce and it affects my centering, especially larger amounts of clay (2-3 pounds and up). Also trimming. When I look at the pulley I see a vertical wobble. I was in contact with the customer service and they sent me a new pulley, no change. I also have a spare wheel head, makes no difference. I’ve tightened the belt to maximum, today tried to loosen it, still the wobble. 
I just ordered a new belt, may an older belt cause a wobble? I’m out of ideas...

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@AnnaVela A belt shouldn't cause a wobble. Are you sure that everything is tight- all set screws, bolts, etc? If it wasn't wobbling before, but is now, but it never got hit or dropped or anything traumatic that could have bent something, then I've got to think it's something come loose. Or maybe a bad bearing?

Can you post a video of the wobble?

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2 hours ago, neilestrick said:

@AnnaVela A belt shouldn't cause a wobble. Are you sure that everything is tight- all set screws, bolts, etc? If it wasn't wobbling before, but is now, but it never got hit or dropped or anything traumatic that could have bent something, then I've got to think it's something come loose. Or maybe a bad bearing?

Can you post a video of the wobble?

Everything is tight, I disassembled and switched heads two times, made sure it fits snug. The only thing I did is switch the motor, but again, everything is tight and nice. Motor is new, so is the head, so this should not be bearings, right? The only thing that is old it’s basically the base and the belt. The wheel is leveled and I don’t move it much. I’m trying to upload the video, but seems that the size is too big or it’s the format.

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Are the bearings with the shaft? and the two wheel heads just fit on top-if yes then maybe its the bearings on the shaft.Motor and belts and lower pullys do not cause wobble .The wheel head and shaft can cause the wobble as each can either get bent or bearing wear out. I am not familiar with clay boss wheels.But its the same for all wheels in terms of wobble-only a few things affect it.

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18 hours ago, Mark C. said:

Are the bearings with the shaft? and the two wheel heads just fit on top-if yes then maybe its the bearings on the shaft.Motor and belts and lower pullys do not cause wobble .The wheel head and shaft can cause the wobble as each can either get bent or bearing wear out. I am not familiar with clay boss wheels.But its the same for all wheels in terms of wobble-only a few things affect it.

I managed to upload a video https://streamable.com/r72cdj

I have two wheel heads and switching them doesn’t make any difference.

Each head comes with its own bearing, it’s assembled this way. When I pull it out, it cones off all together. So I basically slide the head and fix the pulley to it.

 

Edited by AnnaVela

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Ok the pully has wobble but does the wheel head-the video does not show that wheeled well.

It looks like your belt is off meaning the wheel head fully and motor fully are not on same plain. Thats and easy fix .Move the motor or motor pull up to get them on same plain.

Now does the wheel head it self wobble? On top surface

if you do another video slow the wheel head down a bit.

Edited by Mark C.

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46 minutes ago, Mark C. said:

Ok the pully has wobble but does the wheel head-the video does not show that wheeled well.

It looks like your belt is off meaning the wheel head fully and motor fully are not on same plain. Thats and easy fix .Move the motor or motor pull up to get them on same plain.

Now does the wheel head it self wobble? On top surface

if you do another video slow the wheel head down a bit.

The head definitely gets the wobble, I especially feel it when trimming. I’m not sure if I can move the motor though. You mean to “straighten it up” right? Because I can’t move it up or down 

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Pulley wobble doesn't necessarily mean head wobble. If the shaft is straight and solid then it won't matter if the pulley is wobbly. I'm not seeing the wobble in the top of the wheel head. If it's there it's not very bad, at least not nearly as bad as the pulley.

On the underside of the wheel, what is the bearing mounted to? Is it just mounted to the top surface of the wheel, or is there some steel framing underneath that it's bolted to as well? What is the top work surface made of?

Make sure the belt is fully seated onto the small motor pulley. If it's not, you can loosen the set screw(s) and move it up or down on the motor shaft as needed. It's hard to tell in the video if it's seated properly or not. It looks like it's too low, but it may be that the drive grooves are only on the bottom half of the pulley.

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13 minutes ago, neilestrick said:

Pulley wobble doesn't necessarily mean head wobble. If the shaft is straight and solid then it won't matter if the pulley is wobbly. I'm not seeing the wobble in the top of the wheel head. If it's there it's not very bad, at least not nearly as bad as the pulley.

On the underside of the wheel, what is the bearing mounted to? Is it just mounted to the top surface of the wheel, or is there some steel framing underneath that it's bolted to as well? What is the top work surface made of?

Make sure the belt is fully seated onto the small motor pulley. If it's not, you can loosen the set screw(s) and move it up or down on the motor shaft as needed. It's hard to tell in the video if it's seated properly or not. It looks like it's too low, but it may be that the drive grooves are only on the bottom half of the pulley.

I will try to attach more photos.

The belt sits in the grooves on the motor, I lined up the pulley so it goes right in the middle of a pulley. I’m now thinking if I should move the motor lower and pulley as well. It seems I can’t move the motor up if you see the mounting.

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Also if you look at the video on the bottom of the wheel head you can see the bounce. I can even hear it, I know this rhythm too well now ...ugh

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@AnnaVela I think the pulley positions are fine. As long as they line up and belt tracks true you're good. I see the wobble in the bottom of the wheel head, but that looks like differences in the size of the support fins in the casting. The top of the wheel head is where it matters. If you're feeling a rhythmic bounce, that's usually due to a worn belt.

What does the bearing bolt to? Is it just through the top work surface, or does it attach to steel framing underneath?

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I’ve adjusted the motor a bit, also straightened it up with the bolts, no difference. I’m waiting for a new belt to come, to see if this would make a difference. But even without the belt I can see the bounce when I manually spin the head. Attaching the photos of my spare head and pulley, so you can see the bearings construction. Also uploaded the video of the top, you can notice the wobble on the rim which worsens with pressure and weight of clay. https://streamable.com/gv1pnbBy

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6DF07F3A-03F6-4442-8290-DAE602BAD5EF.jpeg

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The belts look lined up fine as well. I see the head is a small bit out looking down at it but whats important is the side view of the wheel head. This is the only plain that matters the top of the wheel head-Let see the wheel head video of the top -shoot the camera on a horizontal plain with wheel head (across the top)This is the only way to see if it goes up and down. The pully below does not matter if thats wobbling a tad.

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Your wheel head looks pretty true-take a look at this thread above.

One thing that stands out to me is these wheels are not made very well-not that does you much good-but mant folks lately are having issues with them.

The dial indicator will tell you the whole story -and it its within 6,000s of an inch that oks they say.

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On 7/28/2020 at 11:42 AM, Mark C. said:

Your wheel head looks pretty true-take a look at this thread above.

One thing that stands out to me is these wheels are not made very well-not that does you much good-but mant folks lately are having issues with them.

The dial indicator will tell you the whole story -and it its within 6,000s of an inch that oks they say.

Thank you for idea on how to measure a bounce!

I guess my issue is not hotizontal wobble, but rather side to side.

Here are two videos:

https://streamable.com/d3e9xz
 

https://streamable.com/zumsa6

Am I being too sensitive about it? )))

 

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1 hour ago, Mark C. said:

Am I being too sensitive about it? )))

Yes side to side should not matter near as much.It the throwing plain-horizontal that matters most._Your looks fine

Got it! Thank you!

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The side to side wobble won't affect your throwing. However it might affect your head as you see it wobble. Just focus on the middle of the wheel where the clay is and try not to look at the edge.

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