(Topic ID: 129284)

STTNG Ball Trough woes.....


By eraserhead

4 years ago



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  • 11 posts
  • 5 Pinsiders participating
  • Latest reply 4 years ago by o-din
  • Topic is favorited by 1 Pinsider

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#1 4 years ago

Has anyone here had issues with the "spawn of satan" ball trough in STTNG?

I keep finding that when two balls are in the trough - and one gets kicked up - the second ball simply likes to stay put. Shaking the machine surely helps, if you catch it quickly enough - it won't consider the movement across the network of opto sensors to be a drain...

If there's three balls in - seldom is there a problem - as the third generally pushes #2 into #1's position.

The trough that came with the machine had been divot-hammered by ball #2 - so it was surely due to be replaced.

Things I've tried:

1. Attempted to replace with an upgraded trough sourced from marco. While this solution would have worked swimmingly - I was unable to shut my coin door - as the plastic bracket on the right coin mech was now banging into the opto board. Returned that part.

2. Bought an identical to oem trough from PPS & installed. The problem was still there - but only just a little less.

3. Replaced all balls with some success (meaning it now happens about half as much as #2).

4. Messed around with the legs of the machine (assuming that my playing preference is too steep for the trough's design).

- The only thing I haven't done is bought the plastic shim to line the guy. Does anyone find that thing is the last piece to close the loop and get this bedraggled-whore-of-a-part reliable?

Is there anything else that I haven't thought of?

#2 4 years ago
Quoted from eraserhead:

Has anyone here had issues with the "spawn of satan" ball trough in STTNG?
I keep finding that when two balls are in the trough - and one gets kicked up - the second ball simply likes to stay put. Shaking the machine surely helps, if you catch it quickly enough - it won't consider the movement across the network of opto sensors to be a drain...
If there's three balls in - seldom is there a problem - as the third generally pushes #2 into #1's position.
The trough that came with the machine had been divot-hammered by ball #2 - so it was surely due to be replaced.
Things I've tried:
1. Attempted to replace with an upgraded trough sourced from marco. While this solution would have worked swimmingly - I was unable to shut my coin door - as the plastic bracket on the right coin mech was now banging into the opto board. Returned that part.
2. Bought an identical to oem trough from PPS & installed. The problem was still there - but only just a little less.
3. Replaced all balls with some success (meaning it now happens about half as much as #2).
4. Messed around with the legs of the machine (assuming that my playing preference is too steep for the trough's design).
- The only thing I haven't done is bought the plastic shim to line the guy. Does anyone find that thing is the last piece to close the loop and get this bedraggled-whore-of-a-part reliable?
Is there anything else that I haven't thought of?

Have you tried sanding out the divots? That worked for me on several games I have worked on.

Otherwise you have Kerry Stair's trough, which is pretty much the best option:

http://www.mantisamusements.com/trough.htm

#3 4 years ago
Quoted from dsuperbee:

Have you tried sanding out the divots? That worked for me on several games I have worked on.
Otherwise you have Kerry Stair's trough, which is pretty much the best option:
http://www.mantisamusements.com/trough.htm

That looks pretty darn identical to the marco one I purchased (I would have loved for that to work properly with out filing things down or bending stuff) .... No idea why that guy was out of tolerance from the original WMS trough - but I needed about another CM of clearance from the opto board to make that one work.

Here's what I bought that didn't quite fit FWIW:

http://www.marcospecialties.com/pinball-parts/A-16809-M

#4 4 years ago
Quoted from eraserhead:

That looks pretty darn identical to the marco one I purchased (I would have loved for that to work properly with out filing things down or bending stuff) .... No idea why that guy was out of tolerance from the original WMS trough - but I needed about another CM of clearance from the opto board to make that one work.
Here's what I bought that didn't quite fit FWIW:
http://www.marcospecialties.com/pinball-parts/A-16809-M

It certainly looks like Kerrys, not sure if it is though.

Is your game at the proper pitch and level left to right? Filing out the divots with a dremel isn't a bad thing, and is the easiest (and cheapest) fix.

#5 4 years ago

This would also likely help, although pinbits is currently out of stock:
http://www.pinbits.com/index.php?main_page=product_info&cPath=51&products_id=449

#6 4 years ago
Quoted from dsuperbee:

It certainly looks like Kerrys, not sure if it is though.
Is your game at the proper pitch and level left to right? Filing out the divots with a dremel isn't a bad thing, and is the easiest (and cheapest) fix.

To be clear - the old trough is gone - i'm currently rocking this one:
http://www.planetarypinball.com/mm5/merchant.mvc?Store_Code=PP&Screen=PROD&Product_Code=PPS-A-16809-2

Is there a proper recommended pitch for that game? If so - i bet it isn't correct (left to right is level).... I've been slowly decreasing the pf slope - i liked it playing fast initially - but if that is known to cause problems, i will surely keep going.

Thanks for your advice thus far.

#7 4 years ago
Quoted from eraserhead:

To be clear - the old trough is gone - i'm currently rocking this one:
http://www.planetarypinball.com/mm5/merchant.mvc?Store_Code=PP&Screen=PROD&Product_Code=PPS-A-16809-2
Is there a proper recommended pitch for that game? If so - i bet it isn't correct (left to right is level).... I've been slowly decreasing the pf slope - i liked it playing fast initially - but if that is known to cause problems, i will surely keep going.
Thanks for your advice thus far.

PF slope from the factory was 6.5 degrees I believe.

Oh yes....Have you checked to see if the balls have become magnetized? That could also cause this. (Although I do believe you had used the plastic insert, which would stop the balls from grabbing the trough.)

#8 4 years ago
Quoted from dsuperbee:

PF slope from the factory was 6.5 degrees I believe.

Then 6.5 degrees it shall be.... thank you.

image1.JPG
#9 4 years ago

Have you tried adjusting ball popper if it's to high that can keep balls in trough from moving forward. Maybe try slightly lowering it to see if that helps

#10 4 years ago
Quoted from pintime:

Have you tried adjusting ball popper if it's to high that can keep balls in trough from moving forward. Maybe try slightly lowering it to see if that helps

It ended up being this.... in replacing the trough - i mounted the upkicker a smidge too high - visibly it looked okay until a ball was in there - then the tip was blocking the path.

thank you all.

#11 4 years ago
Quoted from gcp:

This would also likely help, although pinbits is currently out of stock:
http://www.pinbits.com/index.php?main_page=product_info&cPath=51&products_id=449

That is what I used in my STTNG and has been fine ever since. Nice, cheap fix for worn ball troughs.

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