Not sure if this is the right place but it is shop talk.
Always wanted to build a frame so after a real shitty 2020 I promised myself 2021 I will build a frame or 2.
So I am building a 8020 jig while I practice tig welding. Hope to have it complete sometime in February.
It will be stout.
160x80 spine. 80x80 upright
1” thick jig plate for the headtube, BB and axle plates. Will pivot at the BB center to X0 and Y0 never changes. Will have built in purge.
Will have the BB,Headtube and axle 4” on center.
Should be more? Or 4” enough?
Just looked it up, the thought process makes sense, but having done something similar in the past on my first frame fixture, I found that using indexed dimensions that actually are the frame geo dimensions saves a ton of time. The Cobra design looks like a giant pain to get the BB in the correct position.
Cobra’s frame jig looks great and thought about it but was out of my price range so I’m making mine.
I rather see the frame geo in the jig so I know what it will look like lore or less. Mine is a copy of 44 bikes with some mods.
Fitted it last night and perfect. Just need to laser the degree numbers and logo.
rear end next week along with stand offs.I have a headtube and BBs coming in. It’s getting heavy I will weld up a stand for it
I‘m just playing around. I’m fine if you judge me!
I think Oscar from Simple’s jig looks to be real nice!
I got a manual mill recently (in trade for moto parts) so I want to try and make some parts like your jig.
My goal is to modify my seat angle on my DH frame to be steeper for a dropper post so I was making a jig just for this application. It’s evolving slowly and I’m planning on getting stuck into it after I build another snowboard or two.