rx7locost wrote:
Quote:
just round up/down to the nearest 1/16th and make note of it. Chances are good I'll have bigger gaps from poor cutting/filing anyway, and you're right.. most manufacturers have tolerances of a couple thousand anyway.
Pretty much, that is what I can do in my head. I've worked back and forth from metric to fractional inches to decimal inches and back again for so many years, it is almost second nature. Well, now I'm having just a bit more difficult time, truth be told. I tell myself it is lack of practice.
One can only mark via a pencil to about 1/32" then trying to follow that with cutting will add some more tolerance. By converting decimal to inches, you can round the the nearest 1/16". But I make a mental note of whether that rounding is close to the middle or on the + or _ side of that nearest 1/16" So I'll say to myself something like 21-13/16+" and mark it slightly longer than 21-13/16" ......
You can further cut half your error (pun intended) by making the first cut, then measuring to the 2nd cut rather than marking both ends first and then cutting both ends.
Good thinking with the +/-. Mark in between the 1/16s depending on +/-. And yes, always measure from the cut to the next cut... I never mark more than one cut at a time.. material taken away always messes that up!
In the end, I wasn't really too worried about 1/16", but if you're short 1/16" 8 times, that's 1/2" and that's a big deal... it compounds fast. That's what I'm worried about, making small changes, and in the end, something not fitting at all and having no idea where it went wrong... only for it to be wrong in 10+ places, with no resolution besides adding small structural members and losing the inherent rigidity of single pieces.
I see building you're own frame as a huge safety concern/liability... so I just want to be sure I'm on top of this. Especially if it's something dumb that can be avoided, you know?