Well, I must chime in on the machining aspect, 'cause I'm me!
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
Without gettin' all techy, there is a reason there are so few chaps doing small Ltd. Edition runs of true CNC R/C parts (I'm the only idiot, it seems.) Basically, if one has the multiple skills- Design, CAD, toolpathing, setup, a little aesthetic ability, etc. PLUS the patience to take several years of schooling to master these, AND the $ to tool up with the CAD & CNC equipment, lathe, cutters, saws, grinders, blah blah, it seems only intelligent that you would then seek out the best return on your considerable investment, no?
Doing RC parts is not the ticket to riches! One can make a living, sorta, after the equipment is paid off (Another couple years) until then you're working to pay for it. Now, I'm not complaining! However, as Flipwillis asked, why cant'cha just plug in the CAD & a part pops out? A valid question- The fast answer is it just ain't that simple. The longer answer follows, and I do NOT mean to disparage anyone's efforts in CAD or any other aspect of manufacturing!! I attempt here, using my business as an example, to contextualize the processes.
Renderings are very cool! But CAD is only 1 part of a very involved and tecnical process to making a part, and the mill can't see the cool picture- All it wants is code to tell it what to do, where to go, which tool to use, and how fast to spin it and feed it into the material. Which also takes a lot more experience and knowledge than you'd think- If not right, it can break, tear up the material, leave a lousy finish, etc. I spend a LOT of time on the CAD and, more importantly, the toolpathing- This is what makes actual parts possible, not so much the drawing- the drawing is only useful if it is to be toolpathed and eventually made. Until then, it's just Neat-O.
To hold the part, one must usually design & make fixtures to hold the metal while cutting, get exact repeatability, etc. (For a proto, sometimes you can fudge a bit.) I may have to make up to 4 fixtures to machine 1 part- No one thinks of this, do they?
![Surprised :o](./images/smilies/icon_surprised.gif)
So that's FIVE parts to make 1 part, Hmmm, why things are kinda costly begins to get clearer...
Then prototypes are made, things are changed, run again, changed, run again, ....Finally it's all good, but this takes time and material.
So the production begins: Hopefully enough units sold to make a little money. (Notice that this is a short paragraph: Up until now, whether I make 1 or 100 units, the work is the same: That's why one-off custom stuff costs SOO damn much!)
Then things must be washed of coolant if practical, major deburring & edge breaking done, etc. This is manual, so is not practical to do everything and some is commonly left to the buyer, but is still a pain. Then packaging, hardware, mailing, correpondance, ordering tooling & material, marketing, etc. etc.
So, my customers, for example, get a huge deal whether they think so or not- For proof, again, why is there no one banging these CADded parts out? There are places online that will make you one or a quantity of parts- But no one uses these services, why? Why is no one else doing what I am? Why do no local shops do these parts once the CAD is drawn? There is only one logical answer: Cost. Why so costly? Because you can't just plug in the CAD & have parts pop out (Not yet, anyway: They're working on such and I'll be obsolete one day, but not soon.)
One can cut corners by going to China, using inferior material or hardware, skipping detail, etc. but the biggest way to make $ is to address more popular cars- If I had more sense than passion, I'd be all over short-course parts.
Computers are great tools indeed, but they're just tools for a skilled human to use. Hand the nicest guitar ever made to someone who does not play, and the result is garbage. Comps don't replace skill, they enhance it IF you now learn the new skills to use them!
So, while none of the steps are dispensable, there are also none so important that they deserve disproportionate praise. I've actually had a guy who wanted a part Email me a file & say "I've done the hard part, so...." Needless to say, he was shocked at the estimate & thought I was ripping him off big time.
![Laughing :lol:](./images/smilies/icon_lol.gif)
All quality manufacturing takes the same steps, tools, equipment, skills, etc. whether you're doing Aerospace parts or toy car parts. I hope I have not offended anyone in any way! It just seems that this info is all but unknown to people outside of a Mfg. environment, so I hope this is educational to anyone who wants to know (If not, you just wasted a bunch of time, Sorry!)
![Wink :wink:](./images/smilies/icon_wink.gif)
Chris Cazan REC