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[slappynuts]

That is exactly what they have in that first link I posted.

[Passenger]

I see that, but they are junk. Simple box, or dovetail will work much better because you can actually have some gib adjustment.

[slappynuts]

I plan on running them on the side and making them adjustable.

[Passenger]

I plan on running them on the side and making them adjustable.

So that you have two tiny assed contact points on your cylinder leaving the rest to rattle around? Seriously, think about it, box ways have huge surface contact area and can be adjusted for pressure by two gibs only. Even if you had 4 gibs on a cylinder you wouldn't have 1/16 the amount of contact of a square gib of the SAME surface area.

[weirtech]

i'd go with box way or dovetail for sure.  far more rigid imo.

have you thought about casting the base out of metal?

[mandrel-bends]

You know you can buy old mills off craigslist for ~500-1000 bucks if you're patient. This is going to get expensive and time consuming fast. 

[dvst8r]

...This is going to get expensive and time consuming fast.

He is in employee getting paid by the hour, he has all the time in the world.

[Passenger]

...This is going to get expensive and time consuming fast.

He is in employee getting paid by the hour, he has all the time in the world.

Whaaaatttt, you mean being self employed doesn't mean having unlimited time and money?

[dvst8r]

...This is going to get expensive and time consuming fast.

He is in employee getting paid by the hour, he has all the time in the world.

Whaaaatttt, you mean being self employed doesn't mean having unlimited time and money?

Well in your case unlimited money fits  , but you do seem to be short on time typically... 

[DSharp]

sounds like a 4 axis mill, no?  I'm currently designing/building a cnc router. for cheep ball screws and linear bearings check out ebay. I just bought 3 ball screws and linear rail sets 500mm 1000mm and 1500mm travel for around 500 from linearmotionbearing2008.  ball screws are precision grade c7 so you'll get .002" lead accuracy per foot and the backlash is typically around .0005".

You need to be concerned with the rigidity of your machine.  from what Ive found you want the following minimum for milling:
50,000 lbs/in deflection for steel
12,000 lbs/in defection  for Al
2,000 lbs/in for wood

this is between the cutting tool and the work piece.

[Passenger]

...This is going to get expensive and time consuming fast.

He is in employee getting paid by the hour, he has all the time in the world.

Whaaaatttt, you mean being self employed doesn't mean having unlimited time and money?

Well in your case unlimited money fits  , but you do seem to be short on time typically... 

I wouldn't be comfortable having one without the other. Unfortunately I have neither.

[slappynuts]

It has been done before with the round ways. I think this is the simplest way to build this machine on the cheap. This also has the advantage of being able to be assembled in places you could never get a existing machine.

[Passenger]

It has been done before with the round ways. I think this is the simplest way to build this machine on the cheap. This also has the advantage of being able to be assembled in places you could never get a existing machine.

Right, it was done and abandoned, for a reason. You realize you can buy used machine tools even in third world shitholes right? It seems like you are trying to create a solution for which there is no problem.

[slappynuts]

So who else wants to help design this? I am open to whatever type of ways we decide on as a group.

[rawr]

come up with a cooler idea for something to design and i'll help you

[slappynuts]

come up with a cooler idea for something to design and i'll help you

This is a cool design. Oh well, fuck it I will just buy one.

[rawr]

it would be cool to make out of something in your garage but it's not going to be out of material thats easy enough to aquire to make it universal. Like if you have a hook up on engine blocks or something, know what I mean, dog?

[slappynuts]

it would be cool to make out of something in your garage but it's not going to be out of material thats easy enough to aquire to make it universal. Like if you have a hook up on engine blocks or something, know what I mean, dog?

The stuff im designing with are probably the most readily available stuff you can get.