Which configuration is better? Making a smaller machine, 8” max travel, but am trying to hit really tight tolerances so I’m basing it off larger machines.
Cnc mill help
Which configuration is better? Making a smaller machine, 8” max travel, but am trying to hit really tight tolerances so I’m basing it off larger machines.
a
8" is the minimum size women find enjoyable.
B might be easier to make and keep square. A might be technically better; but keeping it in tolerance and all angled up and coplanar sounds annoying.
I agree, b seems more stable but I have no actual reason to believe that other than “it looks like it to me”
A would have better z clearance though and I could remove the trundle for bigger workpieces so I’m kinda leaning towards that idk
mill b will require the c axis. mill a wont, unless youre doing a lot of curving cuts.
are you intending on building this as a 5-axis? neither seem like they would necessarily be "more precise". horizontal mills like B are often used in applications which require frequent boring of holes on the side of parts since the chips are able to fall out easily. I believe they're also useful for a larger Z length with a shorter height, though that's partially up to the design. I like using vertical mills a lot more personally
Tight tolerances are a midwit dream. Make something that hits a design within 0.1 mm and you are golden 99% of the time. Use specialty techniques for things that need more accuracy, like honing or scraping.
I’m with this anon. Don’t try to make a machine that removes cubic inches of material at extreme tolerances unless you are a factory that absolutely has to produce like that for logistics/throughput reasons.
We call that type of machine ‘elephants’, (they can push a tree over but also pick up a peanut): expensive, high maintenance and more difficult to make.
Why are bigger machines better, besides the increased rigidity? Other factors?
Lol there’s a lot of applications where this is the best way. I have another mill for larger stuff and looser tolerances, but for lil machinery and stuff I want something better. My main application is gonna be robotics and gearboxes so I think this makes sense
> lot of applications where this is the best way
> gonna be robotics and gearboxes
Fabricating your own gears on a makeshift 5 axis cnc mill sure isn’t the best way to do either of these but do whatever you want.