An experimental V-4 wobbler

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raynerd:
Wow !! :drool: Drilling those holes was impressive :bow: It would have gone horribly wrong had I tried! Nice work!

Chris

Imagineering:
Hiya Spud,

All this DRO caper - I thought that you had CNC'd this X2 Mill of yours??

Murray.

spuddevans:

--- Quote from: Bogstandard on May 22, 2011, 05:42:00 PM ---If I could just make a suggestion.
--- End quote ---

Please do, I appreciate all the help I can get.

--- Quote ---On the port faces of your cylinders, run an end mill across the centre of them, or across the centres of the port faces of the main standard, they only need to be about 10 thou (0.25mm) deep, so you have equi distances either side of the port holes unmachined. That will reduce friction no end, and help the faces to bed in much more quickly.

--- End quote ---

Do you mean like this,

If so maybe using a larger endmill may do the trick, centered on the pivot bore.

Thanks Chris :thumbup:

--- Quote from: Imagineering on May 23, 2011, 05:13:38 AM ---Hiya Spud,

All this DRO caper - I thought that you had CNC'd this X2 Mill of yours??

Murray.

--- End quote ---

Hi Murray, you are right, My X2 is CNC'd, but for the purposes of this build log I'm not using it except as a fancy sort of DRO system. One reason for this is that I still have some bugs to iron out in the CNC setup, but the main reason for just using it as a DRO system on this build is that I dont want to give the impression that CNC is needed to build this engine. In fact, you dont even need a DRO, although it does maxe it a lot easier, it is very possible to machine it off the dials and via accurate marking out.

Tim

spuddevans:
I got started on the Endcaps today, and started by chucking some 20mm brass bar in the lathe, and then turning down a section to 13.8mm (the OD of the endcaps) and then turned a tiny 8mm spigot (to fit the cylinder bore). Then I marked up the bar to show a 1.5mm line.

Then I parted off at the line, then repeated 3 more times.

Then I had to clean up the little pip left on from parting, my plan is to mount them into a 14mm ER32 collet and then skim off about 0.1mm off the face. However, as I have tried to chuck up thin items before in my ER32 chuck and have found that without something the same diameter in the rear of the collet, when you tighten the collet up it tends to pull out of true, so I just used one of the endcaps in the other end,

Then I used a plastic handle to "nudge" the endcap into alignment while the collet is only hand tightened with the lathe rotating slowly, then stop the lathe and tighten up.

All four,

Then I took the ER32 collet off the lathe and mounted it on the mill, and drilled the mounting holes.

Then after drilling all 4 holes in the endcaps I couldnt resist mounting one on a cylinder.

Next up will be the packing glands.

Tim

raynerd:
Nice job, Tim. It is really coming together great!

Chris

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