something else wierd

[SnowBowl]

we also have another machine that drops the "7" pin when it spots a new set..we have replaced the spotting cup hoping that was the problem but it still drops it..
any ideas

[Alan Meyers]

Re: something else wierd

Look to see if the bottom of the pin might be hitting the front finger of the respot cell as it is opening after a strike. It can also hit that finger anytime if the cells are poorly adjusted. Also check the table height and level. This should be a good starting point.

[amfpinboy]

Re: something else wierd

Did you double check the width of the cup ?

[JimDorsin]

Re: something else wierd

How does it fall....Does it tip forward or back? this is 1 important clue. It could be a whole slew of possible causes. Check the pindeck for bad spot. When it does successfully spot a 7, is it on spot?? 1/4 inch forward or back could be enough to cause occasional droping.

[LaRue]

Re: something else wierd

you can also check to make sure that the rubber bumpers in the bin are not sticky and keeping the pin from dropping in the cup correctly. had a similar problem. they were holding the pin too long and as the table would go down the pin would drop too hard and not be setting properly in the cup before reaching the pin deck.

[SnowBowl]

Re: something else wierd

the pins sets up about 1/4" off spot to the front of the spot..and when it drops sometimes it drops forward

[Pietenpol]

Re: something else wierd

I've noticed that when the pin drops to the front the first tendency is to loosen the bottom and tighten the top. If it gets too far off spot, towards the approach, I think the cup is 'diving out' under the pin. Then the pin falls into the cup too hard and flops foreward. Loosen the top nuts 3/4- a full turn and tighten the bottom ones the same amount

[JimDorsin]

Re: something else wierd

yep...get that pin on spot. that may fix it.

[maister]

Re: something else wierd

it sounds like the pin is dropping early hence forward of spot, suspiciously like a spotting problem or a bad cup.could be the bush is worn in the connecting rod that ties the head pin thro to the back row.also ensure the cup and liners are clean and not coated with dirt or any chemical residue that would hold on to the pin.
good luck.
maister

[TheGMan143]

Re: something else wierd

Depending on which respot setup you have (long overhead link or short link), the 7 pin front finger has a tendency to come forward and catch the butt of the pin when it swings through. The long link setup is more apt to have this problem than the short link.

Maek yourself a cup-checking gauge... take a flat piece of steel or aluminum plate (even wood will work, as long as it's very flat), and lay it across the whole cup, top to bottom. Put you hand flat on it and 'rock' it side to side and corner-to corner... if the cup is warped, the pin can pop loose and fall over on spotting. The plate gauge makes it very easy to check the cups as part of your table PM, since you don't have to remove the cups to check for warping.

[JimDorsin]

Re: something else wierd

You said you already replaced the cup? What brand was the new one? I have had some brand new JCP cups that just refused to spot pins.

[jez]

Re: something else wierd

this might sound silly, but put some furniture polish on the cup rubbers and give them a real good buffing off, this is surprisingly effective if there is a gum build up on one.

[JimDorsin]

Re: something else wierd

not a bad idea Jez....I use lane oil, but I can see how polish may last quite a bit longer.

[TheGMan143]

Re: something else wierd

Furniture polish many times contains silicone, which works well for the rubber pads in the spotting cups... We would wipe them down with DuPont PERFORMANCE silicone spray on a rag, especially in summer when it got warmer and humid... it seems like that's when they stick the worst.

[NOOLIO]

Re: something else wierd

Dewey-
If problem remains after trying above(s)-
pull the two "middle" cup liners and run with only the single top liner in cup...

Let us know
FATTY