Strange Brackets

[rleete]

They didn't come with the scales?

[EdK]

(03-20-2023, 07:44 AM)rleete Wrote: They didn't come with the scales?

No, I didn't buy a kit which usually comes with the guards. I bought the DRO & scales separately so I could get the length of scales that I needed. Although I did buy it all from the same eBay seller.

Ed

[EdK]

I had to shorten one of the legs of the aluminum angle because it was hitting the read head mounting bracket. Took .125" off. Weird setup to keep the angle from screaming like a banchy while milling it.  
As long as I had it off to mill the one leg shorter I added slots at both ends to accept the end caps.

Ed

         

[EdK]

Got the end caps done for the Y scale. I didn't like how the first batch turned out so I redesigned them and they worked better. I'll tackle the end caps for the X scale tomorrow.

Ed

   

[EdK]

The DRO install is complete. I tried testing it to see if it was giving me good numbers until I realized my method was faulty and I gave up and figured I'd test it under real world conditions.

The next big project for the mill will definitely be an X axis power feed.  

Ed

[EdK]

This t-nut project should be a good test for the DRO.

Ed

   

[arvidj]

(03-21-2023, 07:21 PM)EdK Wrote: I tried testing it to see if it was giving me good numbers until I realized my method was faulty and I gave up and figured I'd test it under real world conditions.

Care to share 'the flawed method' so I don't repeat it?

[EdK]

(03-21-2023, 08:19 PM)arvidj Wrote:

(03-21-2023, 07:21 PM)EdK Wrote: I tried testing it to see if it was giving me good numbers until I realized my method was faulty and I gave up and figured I'd test it under real world conditions.

Care to share 'the flawed method' so I don't repeat it?

The picture below shows how I had it set up to measure the travel of the table via a .001" dial indicator capable of measuring 2" of travel. The problem is that the DI needs to be at perfect right angles to the 123 block in both the Y and Z directions. I used 123 blocks to set it up the best I could. So there will be errors in the set up and parallax errors reading the DI. I was chasing tenths until I realized my method was faulty.

I'm not sure how one would go about accurately testing the DRO numbers. Probably something to do with gauge blocks and a .0001 DTI but that's only part of the puzzle.

Ed

   

[f350ca]

LOL tried the same thing when I installed the DRO on my mill. Kept playing with the corrections and getting nowhere. Then gave myself a slap on the forehead and checked the sine of 1 degree. Over two inches its sizeable.
In the end I used gauge blocks and a 1/2 thou indicator. The scales needed no corrections.

Greg

[Highpower]

(03-21-2023, 10:04 PM)f350ca Wrote: LOL tried the same thing when I installed the DRO on my mill. Kept playing with the corrections and getting nowhere. Then gave myself a slap on the forehead and checked the sine of 1 degree. Over two inches its sizeable.
In the end I used gauge blocks and a 1/2 thou indicator. The scales needed no corrections.

Greg

I just faced the ends of a few pieces of bar stock (different lengths) using the DRO and then measured them with micrometers. They all measured within .0006" of what the DRO (.0002" resolution) showed without any correction. I left it alone. Good enough for my neighborhood.