Hi all. New member (old time follower) trying to build a first proper jig. This is where I am right now:
frame_jig.jpg
The main frame is from 80x160 extrusion and behind the seat tube, there is another one 40x160 that I'm planning on fixing permanently (will mill out a slot in 80x160 to make the 40x160 flush). Blue plates are 20mm aluminum. Rear axle will move horizontally, BB will move vertically (plus seat tube angle) and head tube will move horizontally, vertically plus angle. I looked at 44Bikes jig and some other custom ones but for some reason I really wanted to have the front axle present, so that at any point of time I could check the wheelbase and be sure the axles are aligned. The conical inserts and other details requiring turning are in the making atm. Next step will be milling the 20mm plates. But before I do that I'd like to get some advice on the seat and head tube assembly. I could make the jig the other way around meaning the head tube plate is fixed and BB and rear axle are horizontally adjustable, or fix the BB and make the rear axle vertically adjustable... I'm just wondering what would be the most rigid option. Making the head tube fixture the most rigid one seems obvious, but I am kind of liking the current version. The seat tube beam and head tube beam are 40x40 extrusions right now, fixed around an axle from the bottom and then clamped via the red blocks. Am I over thinking the rigidness or should I change the design before I start milling the aluminum plates...
Thanks!
This is how I built my first frame, so having big hopes for the next one:)
IMG_20140614_175637.jpg
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