Re: [CAD_CAM_EDM_DRO] Re: Making Stepper Pullys

Well without putting the number of teeth in the left hand colum you
desire a print out will be pretty useless.

It is a functional file and does it calculations on the fly. But you
have to tell it how many teeth you want as it isn't a mind reading
program! :)


Garry

Organization: Hobbit Engineering
To: CAD_CAM_EDM_DRO@yahoogroups.com
From: Alan Marconett KM6VV <KM6VV@...>
Date sent: Sun, 25 Nov 2001 15:24:46 -0800
Send reply to: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: Making Stepper Pullys

> Hi John,
>
> I've examined the "TimingBeltpulleys.xls" file, what I saw was a table
> of "MP, XL, H and L" series pulleys, with pitch, depth of cutter and tip
> width for each. Does the spread sheet do more? (I've sent Bill a PDF
> made from the XLS file). I have, in the past, ran a "export macro" (I
> didn't write it), and exported comma delimited data. That data I was
> able to incorporate into a specialized program, much like we'd like to
> do here.
>
> COGPULY.C by Marvin. W. Klotz is a step in the direction Bill would like
> to go. It is based on calculations in an article by John Cooper, who as
> Marvin puts it: "wrote one of the best articles on homeshop gear making
> I've seen". For those of you who haven't seen it yet, the reference is:
>
> "Spur Gears and Pinions" by John A. Cooper
> "Machinist's Workshop", 4/99, Volume 12, Number 2, pg.8
>
> The program is functional, but as Marvin comments, that " but we were
> never able to get agreement with the results in the original article - I
> suspect a mislabeling in the article."
>
> If we could resolve the discrepancy between the article and the program
> output, we'd have a base for generating Gcode to cut timing belt pulleys
> to spec!
>
> I think Bill wants to make multiple passes on the tooth profile,
> starting before, on, and after centerline. I'll let Bill quote it from
> the article. This, I'm told allows cutting the tooth profile with a
> simpler cutter (I think).
>
> Ideally, a program could generate these multiple passes, depths, and
> indexing for various tooth pulley dia's (tooth counts).
>
> "timingbelts.pdf" had a limited amount of tooth profile information, I
> don't know that a cutter profile could be created from it (from my
> limited "tooth" experience), or if we can use the information to resolve
> the discrepancy.
>
> Apologies to anyone that I misquoted or misunderstood, and for jumping
> in the middle of this "project". Corrections requested!
>
> HTH
>
> Alan KM6VV
>
>
> machines@... wrote:
> >
> > >--- In CAD_CAM_EDM_DRO@y..., wanliker@a... wrote:
> > >
> > > You are of course right, but I could never get anything out of it,
> > >as I did
> > > not have EXCELL, but one other member tried it, and also could not
> > >get
> > > results, so it passed out of my memory banks. Thanks for the
> > >reminder, I
> > > hang my head.
> > > bill
> > >
> > >
> > OK Bill,
> > That's got that sorted. What software do you have that can read a
> > spreadsheet?
> > I can rework the program to get it to do this and repost the file.
> >
> > John S.
>
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