RE: [CAD_CAM_EDM_DRO] RE: Cam track help!

The full wave height is 0.680 which is the stroke of the Cam-Axial engine.
I changed the amplitude value to 0.34 which gave me a first value of
0.005933818 verses 0.000207119 calculated by Brayton Paul in the original
design. The other thing I just noticed is that the entire table provided in
the original design is positive numbers meaning the entire sine wave ranges
between 0.0 and +0.680. I suppose it really doesn't matter as long as the
sine waves are pretty close in shape so that the piston will travel
correctly.

This does make for a interesting engine, this brings a whole new definition
to the term two stroke. This thing will produce two power pulses per
revolution of the crank shaft since the sine wave has two peaks and two
valley's per 360 degrees of rotation.

John

> -----Original Message-----
> From: Dan Statman [mailto:dan.statman@...]
> Sent: Wednesday, August 21, 2002 13:27 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] RE: Cam track help!
>
>
> Most likely it is the difference in definition of the term amplitude. My
> definition is the height above the zero point that the sine wave attains,
> and your definition is the difference in height between the highest point
> and the lowest point of the wave. If you want a 1.0 value for
> the full wave
> height difference then you need A=0.5 for the amplitude.
>
> Let me know if this gets the right value.
>
> Daniel J. Statman, Statman Designs
> www.statmandesigns.com
>
>
> ----- Original Message -----
> From: "j.guenther" <j.guenther@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Wednesday, August 21, 2002 12:37 PM
> Subject: [CAD_CAM_EDM_DRO] RE: Cam track help!
>
>
> > Dan,
> >
> > I tried to generate the coordinates for the cam track using
> your formula.
> > What I wanted to see was how close your formula came to the published
> > coordinates from SIC. If I understood the formula correctly and
> > substituting in the appropriate values this formula,
> > 0.68*SIN(PI()*A1*1/180), yields 0.011867636 as the first value while the
> > published coordinate for the first values is 0.000207119. What did I do
> > wrong? In the above case A1 = 1.
> >
> > John Guenther
> > 'Ye Olde Pen Maker'
> > Sterling, Virginia
> >
> >
> > Addresses:
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> >
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Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this as a sister
site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........

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