mini mill

[DaveH]

DA,

Good video,

Looking good

DaveH

[dallen]

(07-12-2012, 08:31 AM)DaveH Wrote: DA,

Good video,

Looking good

DaveH

Thanks on the great vidoe, was up till all hours of the night trying to get the thing the way I wanted and in the smallest format. need to play with them more I guess.

anyway did something different today, tried my hand at scrapping on the slide for the head. so heres a couple pictures of my efforts. be honest and tell me I messed it up

       

Ok pictures posted, I got a question this slide that I am working on isn't square its out from side to side about 2 thousands, I guess my question is would you scrape it out or stick it in the mill and make a cut after clamping it down really good on the scrapped side, then come back and check and scrape it to fiinal height which isn't really critical as long as I don't take off more than a couple thousands.

[ETC57]

Question?

Is there a thread here somewhere on scraping?
I'm not sure I understand the concept.

Jerry.

[Mayhem]

What about using shims?

[dallen]

heres a video that I throwed together to show where my problems lies, its better then the other one.

yes I could use shims but I would have one heck of a time getting things lined up cause I would have to put them in between the head and the slide before installing it back on the mill.


Movie time, pop corn cost extra

[dallen]

(07-12-2012, 06:23 PM)ETC57 Wrote: Question?

Is there a thread here somewhere on scraping?
I'm not sure I understand the concept.

Jerry.

hand scraping is the way the old timers used to fit things together, the machinist would make the parts and the fitters would scrap things into spec.

or if you wanted a straight edge you made three of them and you scrapped them so that all three would fit together, you can't get them any straighter than that.

here is a link that I think is about the best on scrapping the guy has a bunch of videos

http://www.youtube.com/watch?v=uHF7TtHVS...9&index=19

[ETC57]

Thanks Dallen,

Is there a special blade for that? Or just what's handy.

Jerry.

[dallen]

some guys use files sharpened on the end. or you can buy scraper, I have a couple of three cornered bearing scrapers used that are used on about anything that is small. the carbide blades are the best cause they stay sharp longer.

this is an almost lost art, but the japs and chinese still do a lot of scrapping on the machines they build. its one way of telling if a used machine has been run really hard or how much it is worn by looking at the flaking to see how shallow the marks are some machines will have them worn completely away.

I figured that this mini would be a good place to learn a little while trying to straighten out the chinese defects.

watch the videos and you will learn something new, the german guy is good.

[dallen]

woke up on the early side this morning and decided that I would just mill the part that I had questions about. So I clamped it up and took off about 3 thousands just enough that it all the surface had seen the cutter. Then I measured it just like I did last night and was it ever close, but in my wisdom I said that it could be better.

So I marked up the surface plate and proceeded to work on it some. heres the photos.
       

   

[dallen]

(07-12-2012, 10:46 PM)ETC57 Wrote: Thanks Dallen,

Is there a special blade for that? Or just what's handy.

Jerry.

here is a photo of the scrapper I made yesterday, I silver soldered a bit of carbide onto a short length of 1/8 by half inch wide flat bar, today I added the handle.

   

this is the photo of the gib that goes in the column slide, sorry I didn't take a picture of it before I started working on it.