Thread: Atlas 7B Dulux re-furb

Originally Posted by welder

I checked the ram today and found that the ram is worn 0.03 mm. (0.0012") at the clapper end do you think I should worry about this wear

Andre
Why not give the scraping of the ram a try & then transfer that accuracy to its mating parts.
It would not be that big a job on such a short stroke ram, & then you would know it was right, probably for a long time, to come.
The scoring you previously mentioned could be rounded over & you could consider them as "Oil grooves" The knowledge you picked up in the April Scraping course could be applied to this job, with outstanding results .0012" easy.
regards
Bruce

I guess that's what I will have to do but alas my surface plate is not up to the job. I will investigate building a scraper sharpener and lap and look for a surface plate

Originally Posted by welder

I guess that's what I will have to do but alas my surface plate is not up to the job. I will investigate building a scraper sharpener and lap and look for a surface plate

Andre
When I Surface Grind your shaper table & do the square milling job, why not bring along the Ram.
Even if you have to leave it with me, I am sure I can scrape it to straightness & then yoo can use that as a reference to scrape it into the main part of the machine.
How long overall is the Ram?
regards
Bruce

That's a very generous offer Bruce thank you
The ram is 16" long 4 " wide and the ways are about 5/8 wide. I will ask at school to see if I can borrow a surface plate they have sat in the storeroom for the last 30 years and are probably pretty flat. The ram will fit on my surface plate but I have a feeling that my plate is not very flat.

Originally Posted by welder

That's a very generous offer Bruce the ram is 16" long 4 " wide and the ways are about 5/8 wide.

Andre have you arranged to get the parts to Bruce? I'm sure you have but i am heading north tomorrow and don't mind a few side trips.

Originally Posted by welder

That's a very generous offer Bruce the ram is 16" long 4 " wide and the ways are about 5/8 wide.

Andre
Maybe it could be set up on my Surface Grinder initially to give it a lick.
I do not know if I would have the height but the grinder will take 18" long by 6" wide
The other aspect of this job is the table itself.
The table may have sagged or worn that amount, or it may have always been out by this amount.
Whatever happens, we will improve things.
regards
Bruce
ps Does the ram have 60 degree or square guides ?

Ueee we have not organized A Date but I am free next Thursday, Friday Saturday and Sunday probably late for you. The whole machine has square ways.

Originally Posted by welder

No we have not organized A Date but I am free next Thursday, Friday Saturday and Sunday

If it helps i will be heading south again next Saturday

Well I spent this evening scraping the scratches out of the base where the foot that supports the table sits. I know want to re scrape the z axis ways.My question is if I scrape the ways to the surface plate would the two be parallel ?

The scratches I was trying to remove



fly cutting



tonight's progress

Hi Andre,
Will both ways be on the surface plate at the same time? if so then they will be parallel, if not then they wont. I think they need to be kept square to the ram ways in two planes.

Also the area you have scraped on the base would need to be parallel with the X way.(though how close it needs to be I have no idea)

Stuart

The table support / X axis is about the only critical alignment on a shaper that I can think of. Of course each element needs to be aligned in terms of itself, eg any pair of ways has to be parallel, but between elements, like the knee and the ram, most of them just don't matter.

Originally Posted by Stustoys

Hi Andre,
Will both ways be on the surface plate at the same time? if so then they will be parallel, if not then they wont. I think they need to be kept square to the ram ways in two planes.

Also the area you have scraped on the base would need to be parallel with the X way.(though how close it needs to be I have no idea)

Stuart

The surface plate spans both ways at the same time. What I scraped last night only supports the foot that supports the table and I will scrap the foot when the table is on so it will be parallel to the x axis.

Originally Posted by Bryan

most of them just don't matter.

Can't agree with "don't matter". Sure they might not need to be within 5 micron, but how close is "fit for purpose"? But as we never to vertical cuts with the table Z now do we?
Shame MTR doesnt cover shapers

Originally Posted by welder

What I scraped last night only supports the foot that supports the table and I will scrap the foot when the table is on so it will be parallel to the x axis.

Both the bottom of the foot and the part of the base it slides on need to be flat and parallel to the x axis

Stuart