steamer

Quote from: Dave OttoI think anyone who has been here for a long while probably has some personal connection with Eric. I have a gift that me made me with the Close Enough logo engraved in it, I will always cherish it. Eric purchased an unfinished Bill Harris Steam Donkey from me, I was never going to get back to it. He told me that he would probably never finish it either, he just wanted to have something that I had made.

Not to get the post off track but I wonder quite often what ever happened to, Stan Shire, Z Programmer, Bill Lindsey, and the list goes on. I guess it is the nature of forums, people come and go, and some make a lasting impression.
RIP Eric, I hope where ever you end up they have good BBQ and quality whiskey. 

Dave

I have a xouple of neat tools.from the Good Nuf machine shop...i smaill.when I use them

Dave

Quote from: Dave OttoI think anyone who has been here for a long while probably has some personal connection with Eric. I have a gift that me made me with the Close Enough logo engraved in it, I will always cherish it. Eric purchased an unfinished Bill Harris Steam Donkey from me, I was never going to get back to it. He told me that he would probably never finish it either, he just wanted to have something that I had made.

Not to get the post off track but I wonder quite often what ever happened to, Stan Shire, Z Programmer, Bill Lindsey, and the list goes on. I guess it is the nature of forums, people come and go, and some make a lasting impression.
RIP Eric, I hope where ever you end up they have good BBQ and quality whiskey. 

Dave

Stan passed a while back Dave...i reached out to Bill this morning at his old email.and let him know

Dave

Hello all,

I wanted to reach out to the membership to let everyone know about the passage of Eric  (Tennessee Whisky)
last night after a brief illness.   

No services are currently planned though there may be a celebration of life service at a later date.
I am personally crushed by this news as I'm sure many of you are as well, and I wish my deepest condolences to you all.

Dave

Parts look great Mike  gotta agree when you're trying to make a bunch of parts the same...CNC is the way.

Dave

Where did you get the frame printed Jason?

yup  the little gear pumps are persnickety!..  In the lathe Ive had good luck with toolmakers bushings to line up on each bore,

Watching along as well

Dave

Sorry to hear that Per.....I know I dont bounce like I used to.

looking good roger!  following along

Quote from: VixenHello Roger.

Still following closely. 

Mike

Absolutely!!!

I can't possibly begin to tell you all how much I appreciate all your efforts in this regards!    Thank you so much.  My Daughter is at the Pain clinic and is working hard to control the pain she is dealing with.  It's a lot of work for her and my wife and I.  Between that and my job, i've bee far too busy to be in the shop, but I am pecking away with it!    Stay tuned...

Dave

Here's a scan of the Kennametal  chart showing expected finish for given radius and step over

The original CAM file was 250K lines long,  I don't want to add to that so I'll leave it separate. 

Time to cull out some of the files on the machine too.
I'm going to cut the long way, and I'm trying to get a copy of a Kennametal chart on the subject.

Dave

Quote from: Fj45  "That was the facepalm moment I had driving home tonight and it hit me like a brick"

Sweeeet, that'll work. Funny how it comes when ya doing something else (driving).
Me, I truly seem to do my best thinking when asleep ! Go to bed with an issue, wake up with a solution.

Thanks FJ....Yup  Knowing what i know now, Id have programmed the blocks completely differently if I had to do it again..  sigh.....that's how you learn.

Dave

Love seeing that....

Dave

OK OK    Everybody relax ....I got this...LOL    Actually it's a easy solution, and I"m pissed I didnt think of it sooner

What is the problem? and "Whats the Setup?"
As per Porsche the 917 block is a two piece split block split vertically at the crankshaft center.  There is no gasket, I would guess that Porsche sealed the case just like the airplane manufacturers did with split blocks.  A single strand of silk set in shellac.    I'll be using a Loctite product.

That said, the problem I have is I have too much material in the bore.  So much that I can't get the boring bar in.

"Just cut the bar down in diameter so it fits"

Well, The block is 9" long more or less.  So for a between centers boring bar, the bar needs to be double that or 18" long at a minimum, and in actuality more like 20"  The big bar is 1.125" in diameter, while the small one is 0.500" in diameter.    That is pretty skinny!  So cutting them down more is only as a absolutely last resort!

OK the real solution needs to be get more material out of the bores before I run a boring bar down them.  That seems simple enough, and so far I've made is a complicated mess.    But It doesn't need to be!.....and this is where my head slap comes in 

I've got the Tormach!    I have a  locating fixture that is used on the mill and the lathe to locate the block.  I can set the block back up and do a circular interpolation to clear out most of the material leaving .02" for boring,and the rough bores exactly on the center spacing I want....easy as that.

I'll model up a part with 3 half circle troughs that are 31.5mm and 14.5mm in diameter, and let the Tormach and a ball end mill bring it to size ....just like that

That was the facepalm moment I had driving home tonight and it hit me like a brick......Stop screwing around!

The picture below represents the block with 3 troughs using a parallel strategy to bring the bores to 0.5mm undersize on diameter preparatory to boring.  The cutter being used is a 3/16" ball end mill with a 0.012" maximum step over.  Once that is complete, I can put it back in the lathe and finish the bores with the boring bar