Yeah, you don't want it doing that. It might not cause problems, but if nothing else eventually it will affect play.

My suggestion, get a tool like this:

http://www.pinballlife.com/index.php?p=product&id=1518&parent=96

It will make adjusting your slingshots (and all leaf switches) WAY easier. Then, I would suggest bending one of them back so it isn't sensitive at all -- I usually do this to the bottom one first, and then adjust your top one to be just how you want it to be (including testing it with the game on). I like VERY sensitive slings, creates more side drains.

Anyway, once that first one is done, do the second leaf switch to try to match the sensitivity of the first one. I will generally put a piece of paper in the second one so that it won't be going off at the same time. Then, test it again.

If they both are sensitive on their own, but aren't machine gunning or double shooting, you should have no issues taking the little piece of paper out of the first one and playing it like that.

No matter what though, you need a real tool to do it right -- otherwise, you bend the leaf switches in the wrong spot, which can cause inadvertent touching and firing throughout the game. Gotta keep those leaf switches right!!

Power off, remove the slingshot plastic and look straight down at the points, the long
front blade should be resting on the rubber ring, the rear one back a tiny
bit, so a ball hit triggers it, but it won't fire if you bang on the
playfield. A little tweaking and you'll be good at adjusting them.

LTG

Great post LLoyd! Good explanation on how best to adjust these.

With older or dirty machines, always make sure the switch contacts are clean before adjusting.

Ther is also a blade stiffener on the rear switch blade. It keeps the blade from "bouncing" one the sling fires. Make sure it is adjusted to hold the rear blade back.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball.htm
http://www.PinWiki.com - The new place for pinball repair info

On older games I usually spend the 20 bucks and buy 4 new ones, over time they have been adjusted too many times and are worn and bent out of shape, grotty looking and filled with Novus.
If the blades are in good shape and straight clean the contacts with a business card then adjust like LTG recommended.
I kink the stiffner against the back blade and get them close before I put them in the game.
It is better to have the gap a little wider, if it is machine gunning and it sticks it will take out a coil and/or driver.
You really need the tool to adjust them properly from the base of the switch stack.

Good point, if the blades are bent up. Replace them and save a lot of grief continually adjusting them.

LTG

+1