Fixing David's lathe

[Twinsquirrel]

Hi all,

New thread started. Faithfully trying to follow the processes in this thread  http://madmodder.net/index.php?topic=627.0

Well the weather has been too good to be working in the workshop and I have had to do some proper work today   but thought I would post my progress so far while I wait for some paint to dry.

The story so far, after reading Bogs' superb thread about fixing Darren’s lathe I decided to have a go at doing the same to my trusty 7x12, I'm coming to realise that perhaps I have been a little too ambitious so this could all end in tears.

My lathe had a taper of .24mm end to end when measured between the top and bottom of the ways (where the Gib strips run) but having spent a fretful afternoon skimming them  down to .07mm taper over  the length of the bed. Actually not the full length as I didn't skim the area below the head stock.

I didn’t take any pics of the set up but here is something that shows how small my mill is compared to the casting.



These 2 pics are taken about 10" apart





Not too bad?

This is the machined area after a little dressing with some 800 wet+dry paper soaked in oil wrapped around a piece of square bar (thanks for the tip John), The small machining marks are hardly visible to the naked eye but the camera seems to exaggerate them.



I hope to get a bit more done tonight, perhaps squaring up some stock to make the new carriers or maybe I’ll just take a deep breath and relax for the evening and make sure I know what I am doing next.

Cheers

David TS

[sbwhart]

Thats a great bit of work David I think you,v made a good lathe even better.

  


I know what you mean about being nervous about taking chunks out of your beloved machinery, I've been worry about the machining I've got to do to my mill to fit the DRO, but Johns now put me right on that score.

Cheers

Stew

[Stilldrillin]

Nice one David! 

I love to see any mods being made to "my" lathe..... 

David D

[CrewCab]

Ahhhh .............. back with  vengeance Mr Squirrel 

Nice to have you around mate and nice work, that's a pretty tight tolerance, well done 

CC

[bogstandard]

David,

Did you use the upside down flycutter that I said should work OK?

When working with precious parts, it pays to double check everything you are going to be doing, then triple check again, just in case. Write everything down so that you don't make a silly measurement mistake.

If you take your time, everything will turn out just fine. All you have to do is think how good it is going to be when you have finished it.

And always remember, you are never alone. You have the backing of every member on the site, they will always be there if you need a bit of info or encouragement.


John

[mklotz]

When working with precious parts, it pays to double check everything you are going to be doing, then triple check again, just in case. Write everything down so that you don't make a silly measurement mistake.

Another one that should be scratched into the wall of every home shop out there.

John, you've really got to put all these wonderful distillations of experience together into a Book of Proverbs and provide a copy to all the newbies who sign on.

If we could puzzle out a way to condense patience and attention to detail into little nuggets that would fit into jam jars, we could sell them and make a whacking great fortune.

[bogstandard]

I think it all comes with ageing Marv.

The older you get, the slower you go, and everything gets difficult to remember, so you spend more time pondering and thinking how you are going to get it done, and then you have to write it down so that you can remember everything.

John

[Twinsquirrel]

Thanks Gents,

CC, It's good to be back, hopefully all the real world dramas are out of the way for the forseeable future and I'll to do some machining in ernest over the winter months. 

John,

Yup, I used the upside down flycutter that you suggested over on the other thread, you can just see it in the 1st picture. In fact the flycutter is one that I knocked up to get me out of a bit of a situation but it works so well I reach for that one over the shop bought one every time.

[CrewCab]

If we could puzzle out a way to condense patience and attention to detail into little nuggets that would fit into jam jars, we could sell them and make a whacking great fortune. 

Add a sprinkle of common sense, then marinate it all in a bucket of experience and I think you are on to a real winner Chaps  ........ put me down for 15% please 

CC 

[CrewCab]

CC, It's good to be back,

Good to have you back David   

where the heck did you find this lil' "nugget" never rub another mans rhubarb    ......... sorry it just amused me .......

..... anyway are you still into the "Smart" paint repairs and are you off to Harrogate  .......... and VW dark blue ....07 ...... 

CC (Dave)

[Twinsquirrel]

where the heck did you find this lil' "nugget"  never rub another mans rhubarb    ......... sorry it just amused me .......

Lol, dear old Grandpappy sat me on his knee one day........ 

..... anyway are you still into the "Smart" paint repairs and are you off to Harrogate   .......... and VW dark blue ....07 ...... 

uh oh!!! Yep, I'll bring the van!

[CrewCab]

uh oh!!! Yep, I'll bring the van! 

Cheers 

CC

[Davo J]

Hi David,
If you wanted to get the lathe bed any better I would suggest lapping it in, by running the carriage up and down the bed mainly concentrating on the high part with some lapping past between the gib and the bed. Most blokes that have the older IH mills do it to clean up the ways and to bed them in.
Davo

[websterz]

David,

Did you use the upside down flycutter that I said should work OK?

When working with precious parts, it pays to double check everything you are going to be doing, then triple check again, just in case. Write everything down so that you don't make a silly measurement mistake.

If you take your time, everything will turn out just fine. All you have to do is think how good it is going to be when you have finished it.

And always remember, you are never alone. You have the backing of every member on the site, they will always be there if you need a bit of info or encouragement.


John

And, if worse comes to worst, we will buy the still usable bits from you to help finance a new lathe. 

[websterz]

where the heck did you find this lil' "nugget" never rub another mans rhubarb    ......... sorry it just amused me .......

Didn't The Joker (Jack Nicholson) say that to Bruce Wayne/Batman (Michael Keaton)?

[mklotz]

http://vodpod.com/watch/1511136-never-rub-another-mans-rhubarb

[CrewCab]

Never underestimate the power of "Madmodders" 

Kudos guys 

CC

[Twinsquirrel]

Posted by: Davo J
Insert Quote
Hi David,
If you wanted to get the lathe bed any better I would suggest lapping it in, by running the carriage up and down the bed mainly concentrating on the high part with some lapping past between the gib and the bed. Most blokes that have the older IH mills do it to clean up the ways and to bed them in.
Davo

Thanks Davo, will give that a try 

Didn't The Joker (Jack Nicholson) say that to Bruce Wayne/Batman (Michael Keaton)?

Posted by: mklotz
Insert Quote
http://vodpod.com/watch/1511136-never-rub-another-mans-rhubarb

Ah ha so thats where it comes from, never seen Batman so I dunno where I picked it up from?

[websterz]

Posted by: Davo J
Insert Quote
Hi David,
If you wanted to get the lathe bed any better I would suggest lapping it in, by running the carriage up and down the bed mainly concentrating on the high part with some lapping past between the gib and the bed. Most blokes that have the older IH mills do it to clean up the ways and to bed them in.
Davo

Thanks Davo, will give that a try 

Didn't The Joker (Jack Nicholson) say that to Bruce Wayne/Batman (Michael Keaton)?

Posted by: mklotz
Insert Quote
http://vodpod.com/watch/1511136-never-rub-another-mans-rhubarb

Ah ha so thats where it comes from, never seen Batman so I dunno where I picked it up from?

Obviously THEY got it from YOU then. 

[seanacais]

Almost three months with no update?

What happened to the lathe David?

Kevin