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Chapter 4. Maple Mike: > Hey! Let's Build the Trigger! - Pg. 131

MAKE: PROJECTS Eccentric Cubicle Figure 04.27: The Rites of Springs to free the spring wire crossing through and allow you to unscrew the spring off the form. So now you know how to make springs. Need bigger-gauge spring wire? Check your local craft supply house for bead- ers stainless steel "Memory Wire." I've seen it up to about 1 millimeter, which is heavy enough to make a darned manly spring. You can check your local yellows for spring manu- facturers/vendors, but if you're gona go the official route like that, you're just as well off buying the springs you need ready-made, rather than putzing around rolling your own. CAUTION: Make sure the memory wire you get is stainless steel. There's memory wire available made from other alloys ! (I've seen it in weird tungsten and nickel/chromium blends) that performs the way beaders expect memory wire to perform, but is essentially useless for making springs. As always, it's your call. We now return to our program, already in progress. Back to the trigger at hand, I'm gonna assume you have a suitable spring in hand, and by "suitable," I mean "compres- sion, fairly stiff, > ¼" ID." Use the shortest possible length that can attain 1 / 2 " of compression, that bein' as you recall, , the range of movement provided by the cam. Assemble what you've done so far: the cam lever attached to the trigger pin, with the pin running through the ferrule and the lever nested into the slot in the ferrule. Flip the lever to allow maximum extension of the pin through the ferrule, then slide the washer up the pin until it's flush with the ferrule. Using pliers, ensure that your spring is open at one end, and has the wire bent to cross the diameter of the spring at the other. Measure the spring lengthwise, then mark that distance on the pin mea- suring from the face of the washer down the exposed length of the pin. Drill a hole slightly larger than the diameter of the spring wire perpendicularly through the pin at that point, then work the spring down the length of the pin, starting with the open end of the spring. The crossing spring wire at the other end will resist your efforts in this regard, but gentle persis- tence will be amply rewarded when the end of the crossing wire passes through your freshly drilled hole. Ta (as they say) da. Aren't you clever! Your cam activated trigger is now spring- loaded and ready to install. On my homeworld, this is cause for a well-deserved cocktail. I'll have a Tanqueray martini, please. Dry, two olives. I think that's another golfing term, innit? 120