Efferman's Custom Parts

[efferman]

yes iam dumb, please look my edit

[Alasdair Ryan]

yes iam dumb, please look my edit

:laugh:

There is not many diagrams...but take a look at this video.

[efferman]

you want a part, which delivers pneumatic through an unlimited rotating turntable?

[Alasdair Ryan]

Yeb then some longer rams...

[efferman]

for this we need gaskets

[Alasdair Ryan]

You can get sets of rubber washers from hardware stores.

[efferman]

the gaskets are not the problem, more the surface quality of 3d printing. how much functions through the turntable?

[Alasdair Ryan]

Four please.

Edited February 21, 2014 by Alasdair Ryan

[efferman]

four cylinders or four hoses?

[Alasdair Ryan]

Hoses.

[timslegos]

Effe, I love the turntable idea. How much would it cost to get printed? I would definitely be interested if it was cheap enough.

EDIT: What would a studded version look like? Would that work too?

tim

Edited February 21, 2014 by timslegos

[Alasdair Ryan]

Effe, I love the turntable idea. How much would it cost to get printed? I would definitely be interested if it was cheap enough.

tim

Probably more that you get in pocket money for being a a good boy...

[efferman]

the standard sized turntable would cost in same quality 25 to 35 euro without shipping

here are the files in stp and stl if someone want ask his printshop

https://www.dropbox.com/sh/q883sgf5ci3f83m/DpStuHmdqO

[DrJB]

There is a much easier alternative, but works for a single wire/tube ... or maybe few, but they must be bundled together.

Here is a little puzzle in topology ... how do you transmit electrical/pneumatic power from a part that is fixed, to one that is rotating, WITHOUT any twisting?

This can be done rather 'easily', without any complex seals/rings/ ...

[efferman]

and how do you would solve this?

the lower part

drehdurchführung von efferman auf Flickr

[Zerobricks]

Wanst there already some PF turntable for 4 wires someone drew?

[efferman]

sorry i dont know

but the sleew spool valve, or "Drehdurchführung" in german is ready

drehdurchführung komplett von efferman auf Flickr

there is ab big bug in this, so it is not final

Edited February 22, 2014 by efferman

[Boxerlego]

He is an Idea to branch out on see if you can incorporate the servo with the valve design.

[efferman]

sorry, i dont understand what you want say

anyway

i see only one problem: how become a smooth inner side of the cylinder,

[Alasdair Ryan]

What I would like is if you could only make the top and bottom with a thread fitting so we could use brass tubing to screw onto each end to make the size we need.

The internal part should be the same way.

[efferman]

you forgot the piston rod. if you change the length of the cylinder you need a new piston rod. the solution in my post up yours uses two piston rods of standard cylinders.

[Alasdair Ryan]

you forgot the piston rod. if you change the length of the cylinder you need a new piston rod. the solution in my post up yours uses two piston rods of standard cylinders.

The internal part should be the same way.

I said that the should be made the same way with to threaded end parts.

Edited February 22, 2014 by Alasdair Ryan

[efferman]

sorry, but iam a bit tired from constructing the slew spool. i think tomorrow about this idea

drehdurchführung komplett von efferman auf Flickr

[Alasdair Ryan]

That spool looks great,but I wounder how easy it would be to make.

How do you attach the top and bottom?

[efferman]

The 3d print shuold be no problem, only the inner side of the upper part must get a smooth surface before assembling. The gaskets are simple 6x1 O-rings (6mm inner diameter). Tomorrow i will assemble it together with a turntable to show how it will look installed.