Headstock video

[dknapp1]

http://s185.photobucket.com/albums/x208/dknapp1/shopsmith/?action=view&current=headstock1.flv

All, I replaced the sheave on my headstock with a new one. Turned it on and all seems pretty good, but at low speeds I hear what sounds to me like a wobble.
In fact I'd describe it as sounding like a chicken clucking - especially around 50 seconds in.

Any thoughts would be greatly appreciated.

Also, you can see I'm turning the dial with my hand - I will be getting a new porkchop.
Thanks!

dbk

[beeg]

WHY are you getting a new pork chop?

[dknapp1]

More pics here of the pork chop - the black and white ones -
http://s185.photobucket.com/albums/x208/dknapp1/shopsmith/


But I'm replacing the pork chop because it's difficult to turn the dial, and I think it's because of the work pork chop grooves.

Does that sound like a good idea?

dbk

[charlese]

Yes, I see by enlarging your pix to 150% the teeth on the pork chop are pretty well worn. They look just about as bad as mine did when I replaced mine. However the issue this solved was not one of difficult rotation of the speed control. I had been having a problem with speed doing an increase all on it's own. My unit worked reasonable well from speeds 'Slow' to 'P'. From 'P' it would slowly increase all on it's own all the way to fast.

At that same time I also had other problems and had to replace the Control Sheave and the Idler Shaft Assembly.

[dknapp1]

I did replace the sheave that hits the porkchop, but really i'm wondering if the noise in the video is and issue, and if it is, what is making that sound.

dbk

[charlese]

Dave, sounds normal to me at higher speeds. I can pick up a slight - as you say - clucking noise - at lower speeds. I suspect the drive belt has uneven sides. This could be the case if you just installed a new Gates brand drive belt. At least that's my first guess.

[billmayo]

I did replace the sheave that hits the porkchop, but really i'm wondering if the noise in the video is and issue, and if it is, what is making that sound.

dbk

With new belts and at the slower speeds, the belt is at the motor floating and fan sheaves are very close to the motor shaft. You will notice that the sheave veins/ridges get smaller/narrower as you get to the center of the sheaves to the point where there is more space than sheave on each sheave that the belt is operating againest. In fact, the belt is riding on the tips of the veins/ridges. It is the sheave vein/ridge tips hitting the motor belt as the belt is moving that you are hearing. I have found a couple fan/floating sheave tips being flatten by this action (operated at slowest speed for hours) to where the the fan and floating sheave can not longer mesh/close. If you have a real quiet operating Shopsmith and change/replace the belt, you will normally hear more noise at the slowest speeds until the belt gets worn in some. The same happens at the top end but other noises will mask the belt noise. I find belt dressing helps to quiet some of this belt noise. I normally recommend to my customers to stay 3 letters away from SLOW and FAST positions for a few months after a belt change as there is very little RPM change in the last 3 letter positions until the belt wears in.

I am willing to pay shipping and handling costs for any broken, removed or replaced headstock parts as I like to analyze what failed and ways to improve the failed part. I like to machine and make replacement Shopsmith parts for my use and testing. Please contact me off line if you any such parts that you are going to discard. Thanks.

[charlese]

Yeah - Like Bill said - BTW when viewing your video again, couldn't help but notice your speed dial is way off. Needs a high speed adjustment with speed dial placement. But you probably know that!