Quiz / Quote this job

>
> PV:
>
> Ahhh, but when you copy from someone else you're never really sure if who
> you're copying from is correct or not.
>
> Since Jim has posted the answer and explanation, here was what I sent him:
>
> ==================================================================
> Jim:
>
> Well, tool #1 RPM = 3.82 X 500 SF / .750 or 2546 RPM
>
> IPM = .002 X 4 teeth X 2546 RPM or 20.4 IPM
>
> So adding .5 on each end of the bar to clear the 3/8" radius of the
> end mill should give a 13" length. 13" / 20.4 IPM = .64 min. or 38.4 sec.
>
> Tool #2 Would be .750 ball end mill. But being that the dept. is only
> .0215 the width of cut would be c = 2 X square root of h(2r-h) or .2503.
> So RPM = 7640 IPM = 61.12 Starting off and finishing off the bar by .250
> on either side, the length would be 12.5 / 61.12 IPM or .205 min. or 12.3
> sec.
>
> So adding 38.4 sec. and 12.3 sec I get 50.7 sec. So my answer would
> be "D".
>
> Now IF the tool centerlines were started ON the 12" bar length the
> times would be: 12"/20.4 = .588 min. or 35.28 sec. And 12"/61.12 = .196
> min. or 11.76 sec. 35.28 + 11.75 = 47.03 sec. or "C".
> ==================================================================
>
> After sending that to Jim, I looking at his list of multiple choice
> answers more closely and a saw I had made an error. So I sent the
> following addendum:
>
> ==================================================================
> BottleBob wrote:

> would be "D".
>
> Opps, 50.7 seconds is less than 51 seconds, so BOTH of my answers
> would be "C".
> ==================================================================
>
> After sending that addendum, I looked at his multiple choice answers AGAIN
> and saw that there was STILL an error. So I sent the following (I've just
> now added a copy of his original multiple choice list).
>
> ==================================================================
> Jim:
>
> There's an anomaly in your answer list. My first answer of 50.7 is
> MORE than "C" and LESS than "D". LOL
>
> Multiple Choice Answers:
> A. Less than 35 Seconds
> B. Between 35 and 44 Seconds
> C. Between 45 and 50 Seconds
> D. More than 51 seconds but Less Than 1 Minute
> E. More than 1 Minute
> ==================================================================
>
> You see how convoluted things can get? And YOU want to copy from ME? LOL
>
> Also, you can see how handy saving E-mails and posts to an accessible
> "SENT" folder can be now, right? <g>