Author Topic: Fowler BB1 in 2"  (Read 110570 times)

Online Jo

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Re: Fowler BB1 in 2"
« Reply #195 on: April 09, 2014, 08:32:06 PM »
 ;) yep.

I would send you the drawings  :shrug:

Jo
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Offline tangler

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Re: Fowler BB1 in 2"
« Reply #196 on: April 09, 2014, 08:50:13 PM »


So on to the next bit the socket itself. The challenge is to cut a 80mm diameter socket:



In this piece of steel that I have just taken down to diameter:


Jo

Would this help?  Had for it decades, it was a gift - never used it.  I assume it's for cutting internal spheres.



I forgot to put a scale against it.  The main bar is 1" high

Rod

Online Jo

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Re: Fowler BB1 in 2"
« Reply #197 on: April 10, 2014, 07:57:33 AM »
That's the sort of gadget I will need  :D

I have been toying  :noidea: with the idea of either using my ball turning attachment in reverse or maybe putting a rotary table on the lathe bed and mounting a tool post on that. It will be interesting to see what I come up with, even I don't know how I am going to do it yet  :LittleDevil:

Jo
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Online Jasonb

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Re: Fowler BB1 in 2"
« Reply #198 on: April 10, 2014, 10:31:35 AM »
Jo could you mount it to a stub arbor on your horizontal mill and then use the rotary table method on that much like the Dutch guys. I think with a mod to the tool holder I could do it with my Bedair type ball turner, it will alredy cut concave but there is not enough clearance under the tool to do it on the face.

I did cut a concave before by loosening the topslide slightly and pivoting that, think it may have been for the Minnie smokebox door

Offline Steamer5

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Re: Fowler BB1 in 2"
« Reply #199 on: April 10, 2014, 10:36:57 AM »
Hi Jo,
 Give the moths a shock & release a few ! :stir:

This guys got just what you need

http://dreamcutter.com/

Cheers Kerrin

PS loving the fab work, giving me ideas for frame pivot stretches for the Garratt
Get excited and make something!

Offline Stuart

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Re: Fowler BB1 in 2"
« Reply #200 on: April 10, 2014, 10:40:09 AM »
Jo

Why not make a tracing tool for your lathe I made one for my Myford

You need a profile clamped to the bed ,a roller to run on it , a car valve spring to hold the carage on to the profile

Apply the cut with the compound , and wind the feed in

I will do a crap o cad for you later when the del man has been ( I blame you for this no snap for me next month ) one of those cog tool posts do dahs , hope it ok as it's not a new one

Stuart
My aim is for a accurate part with a good finish

Online Jo

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Re: Fowler BB1 in 2"
« Reply #201 on: April 10, 2014, 10:54:36 AM »
Why not make a tracing tool for your lathe I made one for my Myford

You need a profile clamped to the bed ,a roller to run on it , a car valve spring to hold the carage on to the profile

Apply the cut with the compound , and wind the feed in

I might have exactly that little gadget  :embarassed:, I was planning to use it on the tee bar handles for the UPT  :naughty:

It is a bit small to fit on the Colchester  :Jester:

Jo
Enjoyment is more important than achievement.

Offline Stuart

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Re: Fowler BB1 in 2"
« Reply #202 on: April 10, 2014, 10:57:12 AM »
Jo

Then make a bigger one

That's sounds like the panto song about a hole in a bucket :hammerbash:


Stuart
My aim is for a accurate part with a good finish

Offline Stuart

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Re: Fowler BB1 in 2"
« Reply #203 on: April 10, 2014, 03:28:42 PM »
for what its worth

My aim is for a accurate part with a good finish

Offline Pete49

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Re: Fowler BB1 in 2"
« Reply #204 on: April 11, 2014, 04:47:48 AM »
Hi Jo,
 Give the moths a shock & release a few ! :stir:
This guys got just what you need
http://dreamcutter.com/
Cheers Kerrin
PS loving the fab work, giving me ideas for frame pivot stretches for the Garratt

Don't look Jo it will give you a big shock as well as the moths.....I'm still trying to find my heart ...it jumped out and ran :lolb:
Pete

No moths were harmed in this message :LittleDevil:
I used to have a friend.....but the rope broke and he ran away :(....Good news everybody I have another friend...I used chain this time :)

Online Jo

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Re: Fowler BB1 in 2"
« Reply #205 on: April 11, 2014, 07:07:39 AM »
I am safe Pete I don't own a mini lathe and have no plans to add one to the collection  ;)

Jo
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Online Jo

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Re: Fowler BB1 in 2"
« Reply #206 on: April 11, 2014, 05:22:31 PM »
 :Director: This should have been easy  :-\

Failure 1: I tried using the Mill DRO mill function to plot the curve out. Forgetting that the Lathe DRO measured diameter not radius and got 5mm down the bit of steel before I realised my ball was inadequate for the job in hand  :rant:

Not even an attempt 2: I tried downloading Marv's radi calculation program only to find it does not run on a 64 bit computer  :stickpoke:

Attempt 3: I found another excel spreadsheet plotted it all out using Alibre  :) and thought I had it but  :( I had again forgotten that diameter/radius function on the Lathe DRO  :facepalm: I only used up another 1mm on the length.

Last one 4: I doubled all the X axis measurements to get diameters not radi  ;D



And with 2mm to spare  :pinkelephant::



I feel the need to give it a gentle rub :mischief: before I part it off and start its socket. Still have not decided how to do the socket  :thinking:

Jo

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Offline zeeprogrammer

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Re: Fowler BB1 in 2"
« Reply #207 on: April 11, 2014, 05:32:12 PM »
Not even an attempt 2: I tried downloading Marv's radi calculation program only to find it does not run on a 64 bit computer

DOSBOX might help you there. I've used it to run a number of ancient  ;D programs.
Not sure or remember if you need to run in Virtual XP mode. I didn't on my Vista. Haven't tried on my Windows 7.

It's free.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Online Jo

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Re: Fowler BB1 in 2"
« Reply #208 on: April 11, 2014, 05:35:58 PM »
 :shrug: I'm running Windows 8.1. I have no idea on how to get it to revert to working like a real computer it has a mind of its own  :killcomputer:

I was hoping that Marv might think of providing 64 bit versions of his software on his site ;) or standard spreadsheet versions

Jo
Enjoyment is more important than achievement.

Offline chucketn

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Re: Fowler BB1 in 2"
« Reply #209 on: April 11, 2014, 05:50:46 PM »
Jo, I have asked Marve about that and he's not interested in updating. I have downloaded and run his brograms under 64 bit Windows 7 using the Dos Box program. I am a retired computer tech and very familiar with dos and even some basic programing, but prefer to do things in Excel now. Care to share your Excel spreadsheet or the link?

Chuck

 

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