Getting the rails level and straight enough so that there is no twist isn't that big of a deal - and thus 2.5D (carving three dimensional plugs from one orientation) is completely feasible. Back when we made our table out of angle iron (which isn't straight) we came up with a simple adjustable way to straighten it. There are more elegant means now of day; and of course, better extruded profiles to start with in the first place.Ah-hah! That's where we ended up with a headache.
One of the goals of the machine was not just to cut flat sheet but eventually carve mold plugs for the many fiberglass fairings that are to be made. So having something that was reasonably level for that purpose was important to me.
That said, yes, a machine for sheets isn't going to be as critical for flatness now is it? So maybe it's a chicken and egg thing and you have to pick what is more useful at the moment.
Oh, you got my hopes up!I just noticed the CNC in post 31 now says buy one, get one free. So if two of you get together, there's your sub-$3000 kit.
You may be right, but that's not what the "fine" print says. I have sent them an email to clarify.No, indeed that IS buy one get one free! If you add quantity 2 to your cart then you will see the buy one get one free discount when you go to checkout.
I wish I was in a better position to take advantage of this deal...
I've worked on some electronics in the past. Suffice to say, I don't use Chinese designed parts anymore. Though, I'm fine with most things that are designed outside China but are only manufactured there.Having purchased quite a few things from China, remember the old adage TANSTAAFL.... "There ain't no such thing as a free lunch."
The Chinese know how to make money, and that means making your machine as cheap as they possibly can. Most likely you'll find this show up in the wiring and electronics and will be in for a real surprise when the smoke starts to escape. I know this from personal experience and it has really cost me a lot of time and money. Especially compared to my old US made ShopBot that wasn't fast or rigid but was dirt simple and very reliable.
So from my experience buying equipment from China is like trying to use a auto engine in an airplane. Plan on a lot of tinkering to get it to work right. And what looks like a good deal when you start will almost inevitably cost you more in the end.
(have owned CNC routers for the last 15 years)
And that's how they hurt themselves. Sometimes, an otherwise well designed product is messed up by poor manufacturing simply to save on costs.If one got a cheapo chinese router that nonetheless had solid enough framework and only needed re-done electricals... that's what, maybe $1500 if you redo all of it with moderately good steppers and a g540?
I'm more inclined to say build one from scratch but its would br kinda nice to have the frame squared amd ready to plug into...
The CNCRP kits look close to that but there's still lots of bolts and squaring and assembly work to them.
Why don't you ask "how could the time and money spent on buying a TIG welder, and learning how to use it properly, possibly benefit us as homebuilders?" The same could be asked about composites....how could any CNC machines and the required computer hardware, software and programming skills and time possibly benefit us as homebuilders?
I once bought a new small Tucumseh engine for a go kart I made for my kids, it was very cheap and it was a total piece of crap (true story) - so following your lead, everything made in America must be rubbish!Having purchased quite a few things from China, remember the old adage TANSTAAFL.... "There ain't no such thing as a free lunch."
The Chinese know how to make money, and that means making your machine as cheap as they possibly can.
For the most part, I agree.I once bought a new small Tucumseh engine for a go kart I made for my kids, it was very cheap and it was a total piece of crap (true story) - so following your lead, everything made in America must be rubbish!
Now we all know that's not true of course, America indeed makes some crap, but they also make lots of medium level quality and of course, they also make lots of the finest quality stuff in the World.
And so do the Chinese. Oh yes they do.
While some will buy a $500 Chinese built machine against a $1000 American machine and take their chances, if you have a choice between a $1000 Chinese and $1000 American, you will take the American one all day long. Point is there is no market for those medium and fine quality Chinese machines outside of Asia, so all you see in your market is the cheap stuff.
Unless you have a specific one time use or short life cycle for it or as some suggest, willing to make improvements, don't buy cheap crap - which country it is made in has nothing to do with it, you are the Consumer and the decision is solely yours.