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Author Topic: Pin Jams....  (Read 2220 times)

Baboon

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Pin Jams....
« on: November 09, 2008, 02:42:37 AM »
There should be a subfolder in this thread for dumb questions, but here we go:

Why are sweep / pin jam malfunctions called 180s and 90s?

Thanks!
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rockerbowler18

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Re: Pin Jams....
« Reply #1 on: November 09, 2008, 10:49:11 AM »
I just asked my dad, because now I'm curious about the same question...

He says that it's not the same thing...a 180 is where the sweep and pinsetter are 180* out of synch. IE: the sweep is all the way back and stopped, and the pinsetter has already gone back up and the computer thinks the job is done so the sweep doesn't move.
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ThongPrincess

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Re: Pin Jams....
« Reply #2 on: November 09, 2008, 11:32:49 AM »
Being a Math teacher, here's my explanation - 360 degrees is a full circle possibly = to a full cycle of the sweep.  When it only goes through the cycle 1/2 way = 1/2 of the cycle = 180.

As for pin jam = 90, I hadn't heard of it before, but here's my made up explanation.  The pins are not at a 90 degree angle with the pinsetter, and need to be returned to the 90 degree angle.

That's my story and I'm sticking to it
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Edited on 11/9/2008 12:34 PM
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USBC Bronze Coach

"I cannot change the direction of the wind but I can adjust my sails to reach my destination." Jimmy Dean
Quaker 10/93 - 4/07

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J_Mac

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Re: Pin Jams....
« Reply #3 on: November 09, 2008, 11:43:51 AM »
On Brunswick A and A-2's

180 stop - The sweep is all the way back and the pin deck is raised in a position to receive pins.  For whatever reason the machine either hasn't received a full set of pins or machine's detector (it's basically a mechanical computer) hasn't been told that it has.  This is often referred to as a "waiting for pins" call.

90 stop - The pin deck has stopped on top of the pins left after you throw the first ball.  Yet again one of the linkages going to the detector is out of adjustment enough that the signal doesn't get there.

Pretty sure about the 180 call... not as sure about my assessment of the 90 though.  The 180's are a much more common issue since there are more reasons why one can occur.
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ravynfox

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Re: Pin Jams....
« Reply #4 on: November 09, 2008, 12:41:47 PM »
As a center eploy that has done some work on brunswick A-2's. Most of the answers are on track. The sweep actually makes a full circle its too small to see from where your bowling. An a-2 is in constant motion. There is also the gearbox that makes a complete circle. when a machine is ready to go with no pin jams it is at 0 degrees straight down when spotting pins is 90 (for some reason the pinsetter doesn't make the full trip  making the call a 90 stop) Sweep back is 180 (which usually happens when the deck is waiting for pins) there is actually a 270 stop that after the sweep comes back from 180 it doesn't raise and last but not least there is a true 180 "hanging bannanas" where there is no pin jam and it stops sweeping with sweep in back and new pins ready to be set hanging. Hope this helps. I wish all bowlers really knew what happens in the back of the machine.
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Crankenstein300

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Re: Pin Jams....
« Reply #5 on: November 16, 2008, 01:45:47 PM »
What rayvn said. Basically it's based off of one full revolution of the 1:1 shaft on the A series gearbox rotating 360 degrees (there is also a 2:1 for the deck and and 4:1 for the rake) At 90 the deck is down to detect pins (on 1st ball cycle), at 180 the deck is back up and the sweep is entirely back. This is where the machine will stop if the deck does not have pins and it needs to set a full rack. 270 is the deck setting the standing pins back down or a full rack of pins and 360 or 0 is everything back up waiting for another ball.
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