Author Topic: Sixis 101 House Mill  (Read 124422 times)

Online sco

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Re: Sixis 101 House Mill
« Reply #300 on: September 23, 2014, 09:57:19 PM »
Simon, you need one   :ThumbsUp:

:mischief: trust me. http://www.hemingwaykits.com/acatalog/Versatile_Dividing_Head.html

Jo

I remember asking before what the advantages of a dividing head were over a rotary table without getting a completely conclusive answer...

Anyway the question was more haven't you got one of these already so why make another?

Simon.
Ars longa, vita brevis.

Offline Jo

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Re: Sixis 101 House Mill
« Reply #301 on: September 23, 2014, 10:02:37 PM »
That is like asking if it is possible to live with only one lathe  :ROFL:

Sexy wants a tailstock for his and the only way to get it matched with the main dividing head is to bore them both at the same time, the same as we had to do for the arms on the UPT at the beginning of the year.

I have also made a few minor modifications to the mounting on this one so that it can fit on Sexy's tilting table which I am hoping the castings have finished settling and shortly I will be able to get back to finishing it :whoohoo:

Jo
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Online sco

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Re: Sixis 101 House Mill
« Reply #302 on: September 23, 2014, 10:11:24 PM »
Of course - I had momentarily forgotten your need for multiplicity in all things  ;D
Ars longa, vita brevis.

Offline Ramon Wilson

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Re: Sixis 101 House Mill
« Reply #303 on: September 23, 2014, 11:16:12 PM »
That is like asking if it is possible to live with only one lathe  :ROFL:

Of course it is Jo - I've been doing it for over forty years :o  It's like riding a bike - two feet - two pedals   :Lol:
"I ain't here for the long time but I am here for a good time"
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Offline Jo

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Re: Sixis 101 House Mill
« Reply #304 on: September 24, 2014, 06:03:44 AM »
In years gone by model engineers would have done everything on their lathes: Drill, Mill, cut gears etc. But IMHO it is normally easier to use a drilling machine to drill holes and a mill (or shaper) to make things flat. In the same way you can put indexing plates on a rotary table and use it as a dividing head.

Model Engineers are so ingenious in the way they use their tools, they can make so much with so little.  ;)

Jo
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Offline Stuart

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Re: Sixis 101 House Mill
« Reply #305 on: September 24, 2014, 07:30:46 AM »
Jo

Give your fella a treat and fit a stepper motor to the worm and get a division master controller ,and divide at will .


Very nice work and as usually very well documented

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

Online Jasonb

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Re: Sixis 101 House Mill
« Reply #306 on: September 24, 2014, 07:50:40 AM »
Don't really see why you can't bore the tailstock to withing 0.0005" of the head or better?

But would it not be more "versatile" to have a tailstock with adjustable height so you can index things like tapered columns to cut flutes etc? Handy for when you make that 1/24th scale Otto :LittleDevil:

Online Jasonb

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Re: Sixis 101 House Mill
« Reply #307 on: September 24, 2014, 07:57:15 AM »
I remember asking before what the advantages of a dividing head were over a rotary table without getting a completely conclusive answer...Simon.

A rotary table without indexing discs is only as accurate as you can read the venier scale
A Rotary table with set of 3 indexing plates is limited in the number of divisions it will give does depend on size of table as the larger tables take larger wheels which give more holes so more divisions available
A BS0 & BS1dividing head gives more divisions than the above
A BS2 Gives far more divisions than the above

Offline Ramon Wilson

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Re: Sixis 101 House Mill
« Reply #308 on: September 24, 2014, 08:06:55 AM »
In years gone by model engineers would have done everything on their lathes: Drill, Mill, cut gears etc. But IMHO it is normally easier to use a drilling machine to drill holes and a mill (or shaper) to make things flat. In the same way you can put indexing plates on a rotary table and use it as a dividing head.

Model Engineers are so ingenious in the way they use their tools, they can make so much with so little.  ;)

Jo

Just a tease Jo - just a tease  ;)
"I ain't here for the long time but I am here for a good time"
(a very apt phrase - thanks to a well meaning MEM friend)

Offline Jo

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Re: Sixis 101 House Mill
« Reply #309 on: September 24, 2014, 08:14:34 AM »
Strangely enough I do have a tailstock to go with the Harrison dividing head which is height adjustable and used that to mill the columns on my Lady S. But as this VDH is designed to go on Sexy's tilting table so it won't be a problem  ;)



Jason you missed the effects of the size and orientation of the bearing surface. A horizontal rotary table has a large bearing surface to support the work. If used in the vertical mode is has a very small amount of bearing surface, where as the indexing head has a much wider bearing as it is designed to be used in that orientation (the VDH has a similair bearing area as the Myford S7B lathe headstock).

If you then use some sort of holding device in the centre of the rotary table to hold the work to move it far enough out from the surface of the table so that you can get your cutting head close up and personal with the piece of work you then start imposing even greater loads on the rotary table bearings due to the lever effect.

Jo
« Last Edit: September 24, 2014, 08:22:36 AM by Jo »
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Offline Jo

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Re: Sixis 101 House Mill
« Reply #310 on: September 24, 2014, 08:17:28 AM »

Just a tease Jo - just a tease  ;)

 :lolb: I know you are a one lathe man Tug

I am still looking for my perfect one  :mischief:

Jo
Enjoyment is more important than achievement.

Offline tangler

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Re: Sixis 101 House Mill
« Reply #311 on: September 24, 2014, 08:19:54 AM »

But would it not be more "versatile" to have a tailstock with adjustable height so you can index things like tapered columns to cut flutes etc?

Bearing in mind that I've never done this so am talking out of my ar , er hat:  If you were fluting a tapered column would you not want the flutes to be tapered as well,so the cutting depth of the ball ended mill decreases as the diameter gets smaller? Or does it not work like that?

Rod

Offline tangler

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Re: Sixis 101 House Mill
« Reply #312 on: September 24, 2014, 08:21:48 AM »

Just a tease Jo - just a tease  ;)

 :lolb: I know you are a one lathe man Tug

I am still looking for my perfect one  :mischief:

Jo

Everyone
knows that the Myford Super 7 is the perfect lathe  >:D

Offline Jo

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Re: Sixis 101 House Mill
« Reply #313 on: September 24, 2014, 08:23:38 AM »
Everyone knows that the Myford Super 7 is the perfect lathe  >:D

I am selling mine  ;)

Jo
Enjoyment is more important than achievement.

Offline Ramon Wilson

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Re: Sixis 101 House Mill
« Reply #314 on: September 24, 2014, 08:24:37 AM »
:lolb: I know you are a one lathe man Tug
I am still looking for my perfect one  :mischief:

Lathe or man Jo  (or both :D ) good luck with your quest  :)

Now, I really am off to make some more swarf  :D
"I ain't here for the long time but I am here for a good time"
(a very apt phrase - thanks to a well meaning MEM friend)

 

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