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An english description of the above was posted by Achim here at HMEM: http://www.homemodelenginemachinist.com/f13/another-cam-grinder-10361/

Now that looks like a pretty handy tool, for when you don't need the accuracy of sine bars but more accurate than "that looks about right". Gonna get me one of those Thm:

And a test username. Congratulations on being a project of the month winner too Rof}

I don't see any, ever :D (and I don't use any ad blockers Thm: )

Not sure about a genuine NGK, but if you don't mind the Chinese copy, S/S have the CM-6 clone. They also have the smaller Rimfire plugs: http://www.cncengines.com/ic.html

Hi Roy, It is spyware. Apparently not dangerous but still worth removing. Try Malwarebytes to remove it. There is also Spybot free edition removal tool but I haven't used it for years so can't vouch for it anymore. Try Malwarebytes first. http://www.malwarebytes.org/...

Know exactly how that feels. Hope you get some time to play soon Thm:

Thanks Jack, yes I am able to do that but it would create more work believe it or not. If I draw it in imperial and then direct convert to metric, the dimensions will be tedious to machine. 3/16" for example, would be 4.7625mm. For my process at the moment, I look at the plan, quickly calculate...

Yes it would work. Basically a continuation of the image below.

Cheers Brian, I followed your thread as a 'guest' before I had registered, I do go back to it from time to time. Good stuff Thm: Early days yet for my engine, I have only converted the dimensions to the nearest whole metric equivalent. The assembly shown is only a mock up (you can see part...

Sorry, don't have a design but I have seen at shows some nice folded and flame polished acrylic stands. The nice thing about these(to me), done nicely, they are subtle and do not distract your attention from the engine.

For anyone interested, attached is what the $250 version of Alibre/GeoDesign PE spits out: (unfinished Metric version of the Kerzel Hit'n'Miss engine)

I'm right thanks, purchased Alibre for that purpose :D Also for personal use, as Inventor is on a network licence.. no good for working from home. (I could VPN but that's a pain for other reasons)

Hi Brian, Your 'Reservoir Seal Ring' at the crank end of the cylinder may not be needed. If you can find an o-ring that is a nice sealing fit on the outside diameter of the cylinder, you may only need to machine a groove in the reservior for the o-ring to sit in which is slightly smaller than...

No. And it has been a pretty big bone of contention on the Autodesk forum over the years.

Yeah Design Review can be handy. A couple of suppliers to the company I work for have installed it at our request, so they can view the 3D assembly as a supplement to the dimensioned drawings. We were having a few issues with manufactured items, pretty rare occurrence now. For our clients tho...

Awesome work Dave. I'm not at cam grinding stage yet, but after reading your previous thread I know this is going to be of benefit to a lot of people Thm:

Yes they do look very similar to the Wankel but they are quite different.

Model Engineer and Model Engineers' Workshop magazines have had a few articles over the years. A very interesting process though I have never tried it. http://www.model-engineer.co.uk/forums/postings.asp?th=41817 http://www.workshopshed.com/2010/10/drilling-square-holes.html

Looks like it might be Edgar. T. Westbury's 'KIWI' engine, or something very similar. In which case it isn't public domain as I believe the rights are owned by Hemingway kits. I could be wrong. http://modelenginenews.org/etw/kiwi/kiwi_history.html...