Spotting

[Dutch]

I have several 82/70 dinosaurs that are spotting the pins too flat, causing serious wobbling. I've done all the basic table adj's, flagging, height, toe-in, cup adj, etc. After all that, the tables seem too far forward. [img]/content/btubb/images/%%GRAEMLIN_URL%%/mad.gif[/img] I've even checked machine height.

What am I missing? [img]/content/btubb/images/%%GRAEMLIN_URL%%/confused.gif[/img]

Dutch

[8270king]

Re: Spotting

Dutch...I have the same prob on a couple of machines..... I think they were installed too far forward too. The cups are not able to even hit the spots on #16.

Jerry

[Dutch]

Re: Spotting

Sorry about that, the machine is actually too far back, not too far forward. [img]/content/btubb/images/%%GRAEMLIN_URL%%/shocked.gif[/img]

dutch

[Jimmy Jam]

Re: Spotting

Describe how you positioned the table. Do you have the old style table legs that are adjustable.

[TheGMan143]

Re: Spotting

As an aside to this issue...Make sure you have a slight front-to-back pitch on the table...should be just a little higher in the front than in the back. Set it completely flat, and the pins wobble or stay in the cups after hitting the deck and the table starts moving back and away from them.

[GPS]

Re: Spotting

Hey Dutch, just a stab. I removed all the rubber spacers on the bolt that runs through the bottom of thhe spotting cups. I found that if the bolt is tight enough it will squeeze the spacer enough to rub against the pin not letting it seat in the cup. As the cup come to an upright position the pin wants to fall out of the cup. Worth a shot. Good luck

Mike

[Jimmy Jam]

Re: Spotting

If the table located with and without the counter balance springs on, and all the components assosiated with the spotting action are secure and not sloppy or worn, there are a couple of adjustments you can try.

One is to make sure the yolk is square on the table. If its not, the spotting rod adjustment will be off because of the bad 1/2 bubble reading.

If it wasn't you Dutch, I'd say check for a blown out tie link bushing at the #1 shaft or a worn out spot/respot cam. [img]/content/btubb/images/%%GRAEMLIN_URL%%/laugh.gif[/img] I can't believe you settled on letting a machine spot a flat set of pins. Just get in there and work some magic on it and move the table forward. Sometimes to hit a moving target you have to lead it with your sights. :p

[Dutch]

Re: Spotting

Quote:]Originally posted by Jimmy Jam:
Just get in there and work some magic on it and move the table forward. Sometimes to hit a moving target you have to lead it with your sights. :p [/QUOTE]

JJ,

Thanks, I think that's some of the best advice that I've ever received. It's the “Just do it” theory. I keep forgetting about that.

I've checked everything mentioned so far & all I've found are some worn (but not sloppy) rear yoke leg bushings.

What baffles me the most is that it isn't just 1 machine. Out of the 10 machines that I've adj. recently, 3 of them have turned out this way. [img]/content/btubb/images/%%GRAEMLIN_URL%%/frown.gif[/img] I was going to get back to them after all had been gone thru but with so many of them doing this, it seems like a waste of time.

At the Hilton, they all turned out fine when the synthetic lanes were installed & we had to do all 50. Some of the machines even had to be moved in order to get close enough to flag them properly. So, I'm not an amateur at this.

Although I hate to flag the table forward of center, if I can't figure out what the problem is, it may be the only option I have left.

This is the most stress I've had since I left the Hilton. [img]/content/btubb/images/%%GRAEMLIN_URL%%/mad.gif[/img]

Dutch

[Jimmy Jam]

Re: Spotting

Quote:]Originally posted by Jimmy Jam:
Do you have the old style table legs that are adjustable.[/QUOTE]

[Coors]

Re: Spotting

i skimmed forgive me for missing what i state. king is correct machines too far forward... not back/high enough. not enough for "swing" of the rods.

but that's a good thing if ya got wood, in greenbrier (<<--sp) i dont know.

ya gotta do what i wish i could

[Coors]

Re: Spotting

('67 installation and no upgrades to the lanes or otherwise)

[Coors]

Re: Spotting

i added the post above to the post above and it said that which i put in parenthesis could not be posted???

just thought id let ya know mike

[MikeM]

Re: Spotting

Dutch, I wish you luck. That center has some really old stuff.

[Dutch]

Re: Spotting

[img]/content/btubb/images/%%GRAEMLIN_URL%%/mad.gif[/img] That's the last time I buy my tools at the dollar store. [img]/content/btubb/images/%%GRAEMLIN_URL%%/mad.gif[/img]

I took in some of my own tools from home &amp; found that the bubble square at work wasn't even close to accurate. I also got into lane #1 (the worst one) with a flashlight &amp; found that both of the torque tube pillow blocks were completely worn out. There was almost ¼” of play.

New pillow blocks &amp; adjusted from scratch with good tools &amp; it's perfect. [img]/content/btubb/images/%%GRAEMLIN_URL%%/laugh.gif[/img]

I knew I was missing something &amp; I knew it would be something stupid.

Thanks for all your help.

Dutch

PS – JJ - Yes, they're old style table legs. I like the old style better than the new. I don't know why they changed.

[Jimmy Jam]

Re: Spotting

Quote:]Originally posted by dutch:
&amp; found that both of the torque tube pillow blocks were completely worn out. There was almost ¼” of play.

[/QUOTE]

That was kind of why I asked you how you located the table. I used to locate tables using the book method of removing the counter balance springs until I discovered that it ended up in a different spot when you put the springs back on. Will it spot pins with worn out parts? I think so. Do you have to adjust for it? Of course.
Contrary to what the new AMF manual says, "the half bubble controls the amount of toe in", it doesn't, at least, all inclusive by itself, it doesn't. The soul purpose of the half bubble is to give referance to the spotting rod adjustment.
The timing of the front to back sweeping motion of the yolk is controled by the spotting rod. The timing of that sweeping motion is based off the the pin being 5/16 off the deck and the adjustment you made for the half bubble. If the timing of the sweeping rearward motion is correct, you will have to adjust the cups toe in to reach the spots.