Author Topic: Chester 626 mill CNC Conversion  (Read 215813 times)

Offline John Swift

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Re: Chester 626 mill CNC Conversion
« Reply #125 on: November 27, 2011, 03:24:12 PM »

Hi Rob ,

its learning simple techniques like that helps
those of us who's day job is not  mechanical engineering  :bow:

   John

Offline PeterE

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Re: Chester 626 mill CNC Conversion
« Reply #126 on: November 27, 2011, 04:02:12 PM »
A most efficient solution to get the punch marks where they should be!  :thumbup:

I have seen this solution described in an MEW issue some time back, but then the author at the time also hardened the transfer punch screws, did you do it as well or just used the screws as they are???

BR

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Rob.Wilson

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Re: Chester 626 mill CNC Conversion
« Reply #127 on: November 27, 2011, 04:09:27 PM »
Cheers John ,,,,,,,,,, it may come in handy one day  :dremel:

Hi Peter ,,,,,,,,,,,,, just as they are , no need to harden them for a quick one off job  :thumbup:

Rob

Offline PeterE

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Re: Chester 626 mill CNC Conversion
« Reply #128 on: November 27, 2011, 04:25:57 PM »
Thanks Rob  :thumbup:

That's true, and if the need re-occurs over and over again it will be easy to sharpen the point when needed, of course.

BR

/Peter
Always at the edge of my abilities, too often beyond ;-)

Offline Brass_Machine

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Re: Chester 626 mill CNC Conversion
« Reply #129 on: November 27, 2011, 10:40:35 PM »
Great way to make some dimples!

And, BTW,  :jaw: :jaw:

That looks like it belongs there...

Eric
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Offline loply

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Re: Chester 626 mill CNC Conversion
« Reply #130 on: November 28, 2011, 05:18:18 PM »
Anybody know where you can buy sets of these screw-in transfer punches? Been looking for them for ages, can't seem to find them though...

Offline John Stevenson

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Re: Chester 626 mill CNC Conversion
« Reply #131 on: November 28, 2011, 07:15:48 PM »
You can get nearly the same result using a ball bearing, choose a size just big enough not to get stuck in the hole.

I personally use an allen grub screw wound in backwards so it leaves the point sticking out

John S
John Stevenson

Rob.Wilson

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Re: Chester 626 mill CNC Conversion
« Reply #132 on: December 02, 2011, 04:32:06 PM »
Cheers Eric  :thumbup:


Now that the ends are fitted to the table , i could now mark out the position for the bearings , working from the nut .


the other way .



And if i have positioned the table ends correctly ,, the scribed lines should be smack bang in the centre of the bearing block .
 
they were  :coffee:

With both ends marked up ,, i now needed some way of boring out the ends , i decided to use the CUB lathe and mount them on the face plate .
To do this i had to machine up a fixture plate , the end bolted to the plate ,plate bolted to the faceplate .

The fixture plate was machined up from a bit 1"x6"x6" hot rolled steel .
Method i used to hold the plate wile i machined the face's flat .



Finished fixture plate ,, with built in screw jack .



Set up on the lathe ready for boring tomorrow  :dremel:



Rob


Offline doubleboost

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Re: Chester 626 mill CNC Conversion
« Reply #133 on: December 02, 2011, 06:56:43 PM »
 :bow: :bow: :bow:
Even the jig is perfect :clap: :clap: :clap:
I bet the final cut has your arse twitching  :D :D :D :D
I think you are on the home straight now
John

Offline arnoldb

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Re: Chester 626 mill CNC Conversion
« Reply #134 on: December 03, 2011, 02:45:50 AM »
Good going Rob  :bow: :bow:

I really like the way you mounted the plate for facing the flats; never thought to use the clamping kit like that  :thumbup:

Great write-up and photos as well  :bow:

 :beer:, Arnold

Rob.Wilson

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Re: Chester 626 mill CNC Conversion
« Reply #135 on: December 03, 2011, 05:17:49 PM »
Thanks John and Arnold  :beer:

Well that one machined up ,,,,,,,,,,,,, still need to decide what bearings to use on the other end of the ballscrew ,,, i will have a rummage tomorrow and see what i have in my box of bearings .



Rob

Offline Brass_Machine

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Re: Chester 626 mill CNC Conversion
« Reply #136 on: December 03, 2011, 05:25:24 PM »
I wish the pieces I made for my tooling looked half as good as that!

Eric
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We're all mad here. I'm mad. You're mad.

Offline doubleboost

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Re: Chester 626 mill CNC Conversion
« Reply #137 on: December 03, 2011, 05:37:14 PM »
That really looks the part now :thumbup: :thumbup: :thumbup:
I must get some steel that is shiney on the inside :bugeye: :bugeye: :bugeye:
John

Offline HS93

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Re: Chester 626 mill CNC Conversion
« Reply #138 on: December 04, 2011, 02:22:18 AM »
My work seems to be the opposite to Rob's I take a nice piece of shiny metal and make it look Crap, :doh:

people say  "what is the thread for " and I have to say it is supposed to be smooth :doh: :doh:

very interesting post thanks for the detail.

Peter
I am usless at metalwork, Oh and cannot spell either . failure

Rob.Wilson

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Re: Chester 626 mill CNC Conversion
« Reply #139 on: December 04, 2011, 05:37:35 AM »
Thanks Lads  :beer:  ,,,,,,,,,I am pleased with the way the CUB

Offline Bluechip

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Re: Chester 626 mill CNC Conversion
« Reply #140 on: December 04, 2011, 05:41:54 AM »
Thanks Lads  :beer:  ,,,,,,,,,I am pleased with the way the CUB


DOES WHAT ???


BC
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Rob.Wilson

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Re: Chester 626 mill CNC Conversion
« Reply #141 on: December 04, 2011, 05:46:00 AM »
Thanks Lads  :beer:  ,,,,,,,,,I am pleased with the way the CUB grafts  :dremel:

Apologies Petter ,,,,,,,,,, Just re-read the thread and realized i had misses your question about the weld prep  :Doh:  ,,,,, You got it, it is to get good penetration and also i new the job would distort a tad and would need machining back square .

Rob     

Rob.Wilson

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Re: Chester 626 mill CNC Conversion
« Reply #142 on: December 04, 2011, 05:47:45 AM »
Thanks Lads  :beer:  ,,,,,,,,,I am pleased with the way the CUB


DOES WHAT ???


BC


 :lol: :lol: :lol: :lol: :lol: :lol:  :Doh:  Now how did that happen Dave  :scratch:

Must have pressed something wile typing  :Doh:


Rob

Offline saw

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Re: Chester 626 mill CNC Conversion
« Reply #143 on: December 04, 2011, 05:49:35 AM »
Nice done Rob :clap: :clap: :clap:
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Offline DMIOM

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Re: Chester 626 mill CNC Conversion
« Reply #144 on: December 06, 2011, 11:20:43 AM »
.....

......

Well, I know there were at least one set of raised eyebrows when Rob showed his 3D model with a shiny bore - but I think we'd have to admit that the results aren't that different!

Dave  :thumbup:

Offline loply

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Re: Chester 626 mill CNC Conversion
« Reply #145 on: December 06, 2011, 04:07:15 PM »
Rob,

Do you mind me asking why you decided to do this operation on the lathe rather than the mill? Is it because the mill is in pieces/you don't have another one, or is it advantageous to do it on the lathe?

Rob.Wilson

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Re: Chester 626 mill CNC Conversion
« Reply #146 on: December 07, 2011, 03:08:01 PM »
Thanks Benni   :beer:

Cheers Dave ,,,,,,,,, I it looks close enough  :lol: :lol: :lol: :lol:


Rob,

Do you mind me asking why you decided to do this operation on the lathe rather than the mill? Is it because the mill is in pieces/you don't have another one, or is it advantageous to do it on the lathe?


Hi Loply ,,,,,,,,,,,,Dont mined at all ,,, its allot easier/quicker  to do a boring operation in the lathe if the job will fit ,better range of feeds and speeds , if i had used the other mill and a boring head i would have had to hand crank the Z feed ,no power feed , much better to sit back have a brew  and watch the lathe do all the work  :med: I also wanted the use the old CUB lathe as since its rebuild it has only done one other real  job  :dremel:

Just to add , the fixture plate will be used for  other jobs that come up ,,not just on the lathe  :med:

Rob  :beer:

Offline John Rudd

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Re: Chester 626 mill CNC Conversion
« Reply #147 on: December 07, 2011, 03:58:13 PM »
its allot easier/quicker  to do a boring operation in the lathe  much better to sit back have a brew  and watch the lathe do all the work

Err more like a pint of Newcy Brun Ale....than tea...( why cant I do a Goerdie accent in typology... :D )



Nice job there Rob....very nice...
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Offline doubleboost

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Re: Chester 626 mill CNC Conversion
« Reply #148 on: December 07, 2011, 04:03:00 PM »
Looking great Rob
To take a worn out machine restore it and then turn out parts like that
Is a true insperation  :bow: :bow:

Rob.Wilson

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Re: Chester 626 mill CNC Conversion
« Reply #149 on: December 14, 2011, 04:09:53 PM »
Cheers John and John  :beer:

John ,,,,,,,,,,,,,  :lol: :lol: i prefer a higher alcohol content in my bottle  :ddb: :ddb:


A bit more done ,,,,,,,,,,,,,,,,not allot but its a step closer to the finish line  :med:   ,,,,,, Turned up the locking rings for want of a better name ,, these
do three jobs , lock the bearing outer ,hold the shaft seal and  to locate  motor . And i also machined up the end cap for the other end  :dremel:




Rob