Defeet Woolie Boilies + Specialized Defrosters. It has been me go to combo since forever.
It was -1 yesterday so if anything it was a bit warm actually.
Our local trail builders had been out sweeping the trails over the weekend. They were perfect.
Hope you don't mind the questions but I was thinking about this the other day.
These renders look great. Apart from visuals, do they offer any benefit?
Presumably you are modelling the frame and components in some 3D/ CAD software - which one? And do you need to manually define and extrude all the tube sections, or can you import geometries from catalogs?
And also, that top tube - off the shelf or custom formed?
Love answering stuff. No worries.
CAD modelling and rendering is a part of my process. Aesthetics are important to me and I feel I can guage the outcome much better being able to view my work as a visualisation render before committing to anything.
I also expect this will be my thing compared to other framebuilders. Customer will get a pretty precise idea of what they are getting.
Wheels are off Grab CAD website but everything else I draw up in Rhino. Dropouts and stuff for CNC machining I model in Fusion 360.
All tubes are drawn up based on Columbus and Reynolds drawings if they are special (s bend stays for example) or I need to check clearances. So that top tube for example is a Columbus Max modelled after a drawing.
I draw tubes up uncut and have an archive of modelled tubes so it's easy to make a bike design by importing tubes and placing according to geometry line drawing
Are you planning to move your workflow to Fusion 360 entirely?
I appreciate there'll be a learning curve to drawing the tube profiles, but I think it would simplify your workflow keeping it all in one software suite.
Here's a photo
Not currently. I can't see what Fusion offers me in terms of sketching and measurements that rhino doesn't already does. I am soooo quick in Rhino it doesn't matter with parametrics I think 🤔
I understand your reasoning and it's a good point.
I think parametrics are mostly an advantage if you do loads of iterations on a part level - i.e. drop outs and other details, whereas the tube profiles are to spec.
Coming from and engineering background I am partil to parametric modelling and how easy it is to create part drawings in Fusion/Inventor.
Really interesting, thanks. I haven't used Rhino since I had access via an old job. Might be able to get it through my University...
I'm saying this as an engineer who is shortly going to take a framebuilding class. I've previously figured out my geometry with the free version of bikecad. However it would be interesting to take this a bit further.
By the by, I thought I remembered seeing similar pre-production renders (or actually hand-drawn art) by Tomii Cycles, but I'm struggling to find an example now so perhaps I misremembered.
Thank god I’m geotechnical and therefore don’t use Rhino. In my head I’ve now got a weird grasshopper script visualised to do parametric modelling with some sliders for setting up geometry…
Oh yeah that's definitely also a possibility. I just don't care enough to get techy.
You even need Rhino to make a nice frame
Yes Tomii does coloured drawings.
s bend stays for example
s bend stays for example
what's your process? Bend, flow along curve, something else?
I've found my results to be somewhat unreliable.
I draw up the lines based on the dimensions. The curves comes from "fillet" function using the described radiuses. That becomes my "rail". Then i draw the ellipses or circles along the curve as descruin the drawing and finally I "sweep1" along the "rail". Works absolutely fine for me.
Ah yes, brainfart, sweep rail is what I meant.
Need to step up my game then.
Any tips on getting nice non-linear cross-section tapers, as in chainstays?
Also meant to ask. Would such a CS-Dropout miter be structurally sound?
Sorry to hijack.
Yes I believe that would be alright, but given that the DS dropout is supposed to pinch I would let the mitres be more concentric to the dropout radius. Also it's prettier IMO
Not sure what you mean other what I've just written down. Next time I have to do a complicated tube I'll screen grab it and make a YouTube video of it
When I saw this frame when you first posted it I didn't realise how versatile it was. Excited for when you start working down the list of people you're making frames for and get to me :)
Trying to get my ducks in a row and streamline stuff. Selling stuff and buying tools currently.
Hopefully I will be able to build more efficiently from Feb when my teaching contract ends.
@nogk this reminds me I sold the Marin I am afraid. But it's going to Stockholm and you are a Swede as well right? So could let him know you'd want it if he wants to pass it on.
As a member of UCU I’m an avowed opponent of fixed-term contracts in HE, but in this case I’ll make an exception ;)
I have no clue what you just said
Hulsroys all academic future framebuilders Hustle...
Universities and Colleges Union is currently on strike due to (among other things) lack of job security in Higher Education caused by fixed term contracts
I have a meeting with my labs new professor on Friday. She's into the idea of me doing a PhD which I've been hovering around since 2013. So maybe I can make in academia after all :)
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