Dyna Beads how's it going !!!

[lragan]

If the axle were perfectly fixed and immovable this would not happen unless the imbalance was due to the tire alone, but this is not the case, because of springs and, even if there were no springs, the finite weight of the vehicle.

IF this is the case how can a perfectly fixed and immoovable spin balancer compensate for these other variables?

I am not sure I know how a spin balancer works, as I have never used one.  I have seen them used on a wheel and tire combination off the vehicle, and assumed that the machine was able to detect and measure the forces acting on the axle where the wheel is mounted, and calculate where to add weight and how much to add.  I have no idea how it can compensate for imbalance in the rotor, axle, etc. that is left on the vehicle.  Magic, I guess.

My point is that if the axle/wheel/rotor, etc. does not move, it cannot impart imbalance forces into the tire, and the tire will not distend due to imbalances that accrue to components other than the tire.  So if you are correct and the spin balancer axle does not vibrate at all, then, according to my theory, the beads could not compensate for any imbalances except for those in the tire while on such a balancer.

I thought Lance was talking about a dynamic balancer that ran the system up to speed on the vehicle, so that all the imbalances were measured and compensated.  In this case, won't the axle move due to the springs?  It has been a very long time since I have seen this done, and it was accomplished with an electric motor that drove a wide "pulley" in contact with the tire.  Are these still in use?

It still seems to me that the optimum arrangement would spin up the wheel, without the tire, while on the vehicle, and balance it with weights -- then add the tire and the beads.  I have never seen a system that could accomplish this on the vehicle balancing act without the tire, so it is probably just a wild idea that will never be tested.

[Charles S Otwell]

Are these still in use?

LOL man your showing our age I used one back in the late sixties until my boss upgraded to a used Coats spin balancer, I remember the ring you had to attach to the wheel and manually pull or push the button in the center until the tire stopped vibrating then place the weight where the pointer showed, thing used to scare me to death, it would occasionally come off and go flying across the room. It took both of us to balance the rear because someone had to sit in the car and spin the rear tire, try that with a standard . We also had a tire truing machine that would turn the tire while a spinning disc shaped blade cut the high spots down. Tires weren't as round back then I guess, I wonder if anyone still uses one of those. Might work on taking a little of the edge off car tires for the dark side. Anyway I didn't understand how the old balancer worked or the new or the beads mostly I just like jerking your chain a little  ..

[Greg Cothern]

You trying to say your so old that tires were still square?????


Running back under my rock now so I can avoid the sharp object that will be flying my way hehehehehe.

[Charles S Otwell]

You trying to say your so old that tires were still square?????

lol, well they felt square if you let them set in one place to long, ask me how many fake white walls I installed on black wall tires. The quality and price of the tire depended a lot on whether it was a two ply or four ply.

[lragan]

It is my undocumented perception that the "out of round" tire problem was largely solved with the advent of radial belted tires.  I still remember the first time I put Michelin steel belted radials on my '63 MG.  What an amazing difference!!

[Charles S Otwell]

Who remembers the Seventy series polyglas tires of the ninteen seventies? Cool tires, red stripes or raised white letters  ..

I found this kinda interesting..
http://www.jags.org/TechInfo/2001/05May01/tires/historyoftires.htm

[lragan]

Thanks for the history link, Charles.

I worked at TI when we took a calculator chip and LED display to Burroughs (sp?), the dominant maker of desktop electro-mechanical calculators.  They objected that there was no printer, so our guys came home to work the problem and in a few months came up with a semiconductor-based thermal printer, whereupon we went back to Burroughs.  At the end of a long day, their CEO sat across the table, and said that yes, this was obviously a less expensive way to make calculators, but what was he going to do with this gigantic factory that made cams and gears and switches?  Our sales guy did not have the courage to tell him the truth -- you are going to scrap it.  You are going to scrap it because you choose to or because you are forced to, but you will scrap it.

A few months later, TI entered the calculator market, and in less than two years, Burroughs market share went to zilch, and they scrapped the factory.

It is amazing to me that the US auto/tire industry was able to resist the obviously superior technology for so long...

[hootmon]

Found this place on-line - seems like a good price for a different named product...

BOWES