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Maybe you didn't get it on your frame but even with lugs on mine, I did one joint at a time completely and when I came to join the top tube to the seat tube, it had moved about an inch too high.
So i guess you just get to hold it all together straight while you braze it up without it moving from heat distortion. I imagine its less of an issue with a jig
PhilDAS-
I didn’t really have too firm of a plan to deviate from when I started building my last one!
I knew where I wanted the bb height to be (for track legality) and I had planned what my seat and head angles would be and in the end yeah, I was a degree or so out on each. I thought I’d been paying too much attention to keeping the tubes at 90deg to bb shell across the way and had let them ‘pull’ slightly within the lug in a front to back direction.
I found the thread btw, it was Skant’s build for his aunty so I’ve asked him.
Might also be worth noting that I did one joint at a time as that was what the 2 books I had suggested but at the time I didn’t think about how they were really talking about lugged construction and I was just using them as a rough guide, I took the order I did the joints in from them for example.
M_V
For a fillet brazed frame, what are the benefits of tacking up the whole frame then going back over doing proper fillets versus completing each joint as you go?
I did each joint as I went on my first frame (bb lug, rest fillets) and was going to do the same on my next frame which will be totally filleted.
I would have just done as before but I noticed recently in a CP thread that I can’t find now (think it was someone that used to work at Shand?) that they had completely assembled the frame with racks and were then going back over doing the fillets.
They were building with a jig whereas I’ll be building out of my vice if it’ll make any difference.