to Rick "T" Re: 12 years experience in failed PM model building


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Posted by Jeff Langworthy (66.82.9.27) on May 03, 2003 at 13:02:12:

In Reply to: Re: 12 years experience in failed PM model building posted by Rick T, on May 03, 2003 at 11:34:03:

Rick,
Speaking of lurker losers, I haven't seen too many contributions from you. Your negative comments contribute nothing. Why don't you show us all how it's done or just go away? Personally, I commend Vlado for his obvious commitment to the cause over the years and would welcome any of his contributions. I like his approach to an adjustable machine, and perhaps we could learn something from him. That's all I have to say.

Jeff.

: : Hi to all

: : I am new to this site, and have found the previous posts to be interesting reading.

: : I have been trying to build a working model for the last 12 years, long before I heard about Bessler, or had net access.

: : It seems the learning curve to a successful model is a long and slow one. Just as I was about to throw my hands up in despair, I came across the John Collins book, purchased it, and now have a sort of renewed faith in the possibilty, so to John, thanks for at least giving me re-newed hope.

:
: Hmm a learning curve and you have university knowledge?

: : I have university knowledge

: Excuse me...knowledge...no degree???!!! Very tricky use of words there chap!
: :in Mechanical Engineering, and consider my knowledge of forces, angular and linear momentum, acceleration, centripetal force, torque, inertia, precession, rotation, the consevation laws, and all the rest, to be second to none.

: Sure sonny boy, sure...

: : I know in my head it should be impossible, however, my heart says there must be a way.

: : First off, let me say it can be very discouraging to build model after model, only to see them all dismally fail to spin.

: : I have not actually built a large number of models, probably around 6 in the 12 years, as 99.9% of the time I can, on paper, disprove that they will work.

: : Many hundreds, if not thousands, of drawings, calculations, etc later.

:
: Really not too bright are you?

: : However, I have just completed my most ambitious model for testing purposes. It has been custom machined by various engineering shops to be highly modifiable, to allow a lot of different test simulations and configurations to be done on it. The parts are made from aluminium, tool steel etc, with many different arms, bearings etc, all CNC machined from billets. I figure at least building it this way, although longer and much more expensive, will allow me to test many different ways on the one model, rather than keep building specific model after model. I have also purchased test equipment to measure results, such as infared tachometers, speed indicators etc.

: : Having just taken final delivery of the last few components today, I guess I feel excited that at least some testing can now be done, rather than just calculate and theorise on paper.

: : If anyone is interested, I will post some pictures of it.

: : It has taken me almost three years to design, budget for, and get built.

: : I am now at a stage where I can test one concept at least which has been gnawing away at me for the last few years, and I hope, at least for some sign that I am on the right track.

: : Anyways, as I read through the posts, it amazes me that so many people have an interest in this field.

: Ahh finally to the point.

: : I hope to participate in the discussions, and put in my two cents worth where I feel I may have some knowledge or experience to contribute (or maybe just to vent some frustration :)

: : If anyone feels they would like an expert engineering analysis of their design, as long as the design is not too complicated (as it takes time to analyse all the forces involved and calculate), I will try to accomodate you (also, as long as I am not suddenly swamped with requests), within my spare time.

: Sure. GET LOST you lurker loser.




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