Bruns A wierd cycle issue,

[Tmc]

Hi all,
I have a machine that when on second ball sweeps pins then makes a short detecting stroke as if on first ball strike then returns to second ball with no pins standing .Deck does not shift or anything.
Thanks

[witty690]

Id start with adjusting your deck holding hook. If the deck isnt held up at the start of a second ball cycle, it will perform a first ball cycle.

Then adjust your detector, check the roll pins, make sure nothings bound up. Even though the deck holding hook is not holding the deck up, it is not detecting any pins so it should reset a new full rack and go to first ball.

Adjust/inspect these two and let us know what you find

[Popeye]

The deck holding hook is supposed to let the deck go down after it sweeps on 2nd ball. And the reason the machine is still on 2nd ball is because it did a short stroke and the machine does a second detection at 270 and this is putting it back on 2nd ball. At first I thought it could be the deck lowering link latch slipping off but then the deck would still shift. So I would do as witty690 said and start with the detector adjustments. Also check for a spring off. Check the adjustment and operation/condition of the moving deck scissors latch (flag).

[Steve Stafford (JBEES)]

Cycle machine to 90 degrees second ball. Check to be sure the strike cam follower has fallen into the low of the timing cam in the dtector.

It should look like this...



If it did not fall all the way into the low of the cam and there is a gap between the bearing and the cam...you may have a restriction in the movement of the D shaft. This could be caused by the moving deck scissor latch having a bind (as mentioned above by Popey) or there may be an issue with the strike cam follower which has the pin detector link attached to it. The pin detector link runs under the detector to the bottom of the actuator links in the clutch reset linkage. Check for a bind there also.

If the roller on the strike cam follower looks like it never started into the low of the timing cam, there will be a large gap between it and the timing cam and you did not get a strike detection. Spring being off like Popeye suggested would come to mind first...but answer this question...does the detector detect a strike when the deck lowers during a first ball strike cycle? If so...I would suspect the detector rod adjustment at 0 degrees or the alignment of the roll pins on the detector rod.

Let us know what you find...