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Post by rmf on Oct 22, 2019 3:54:39 GMT -5
I use an Diamond Pacific unit and was having a problem with the 325 wheel wearing out too soon and it was suggested I use a 220 Nova after the 220 plated wheel. That resolved my problem but it left me with one too many wheels for the unit. Then I purchased a cheap Chinese made diamond wheel form Kingsley North (and discovered why it was so cheap) that was 8000 grit it made a cheap proof of concept wheel but it was not round. It did provide me with good enough results I have purchased an 8000 Nova and I really like it. Now I have two wheels on a different grinder. Back in the day when I purchased my DP unit they jumped from 1200 to 14000. This was DPs way of bleeding the customer. I say that because any moron that has cut more than two stones can figure out that to go from 1200 to 14000 is a total waste of time. you need the 3000 and the 8000 in between or you spend too much time on the 14000 wheel and get poor results.
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gemfeller
Cave Dweller 
Member since June 2011
Posts: 4,064 
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Post by gemfeller on Oct 24, 2019 21:45:51 GMT -5
hummingbirdstones2 , I found a moment to search for the technical article on polishing I mentioned earlier in the thread. While it's aimed at faceting it should apply equally to cabbing work I think. This is titled "Part One." I've never been able to find a "Part Two." I suspect Dr. Attaway never got around to writing it. But there's plenty to think about in the present article. www.attawaygems.com/NMFG/mystery_of_polish.pdf
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Post by hummingbirdstones on Oct 24, 2019 21:50:04 GMT -5
hummingbirdstones2 , I found a moment to search for the technical article on polishing I mentioned earlier in the thread. While it's aimed at faceting it should apply equally to cabbing work I think. This is titled "Part One." I've never been able to find a "Part Two." I suspect Dr. Attaway never got around to writing it. But there's plenty to think about in the present article. www.attawaygems.com/NMFG/mystery_of_polish.pdf , I have that article archived somewhere on my laptap. I also believe it would apply to cabbing. It makes total sense to me. |
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Post by stardiamond on Oct 25, 2019 0:36:52 GMT -5
I use an Diamond Pacific unit and was having a problem with the 325 wheel wearing out too soon and it was suggested I use a 220 Nova after the 220 plated wheel. That resolved my problem but it left me with one too many wheels for the unit. Then I purchased a cheap Chinese made diamond wheel form Kingsley North (and discovered why it was so cheap) that was 8000 grit it made a cheap proof of concept wheel but it was not round. It did provide me with good enough results I have purchased an 8000 Nova and I really like it. Now I have two wheels on a different grinder. Back in the day when I purchased my DP unit they jumped from 1200 to 14000. This was DPs way of bleeding the customer. I say that because any moron that has cut more than two stones can figure out that to go from 1200 to 14000 is a total waste of time. you need the 3000 and the 8000 in between or you spend too much time on the 14000 wheel and get poor results. I must be one of those morons. A Genie has 6 wheels and the first 5 are necessary. The sixth wheel was 8,000. When I moved the 600 and 1200 to my 8 inch machine, I added a 14,000 because I got it cheap and left either a 600 or 1200 on the Genie arbor until I replaced it with a 325. With the original Genie configuration, I didn't overwork the 8,000. Under the new configuration I still go from 1200 to 8,000. The biggest contributor to wheel wear is trying to do too much with a higher grit. For example trying to fix 280 soft mistakes with a 600 wheel. I like my 325 because it gives me another chance to fix 280 mistakes before going to 600. The next biggest contributor to wheel wear is having to go back to a lower grit, i.e. polishing seeing scratches and having to repeat 280 through polish. |
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Post by hummingbirdstones2 on Oct 25, 2019 8:36:30 GMT -5
Thanks, Rick. I also have that one saved.
Here's a link to the one he wrote about subsurface damage.
I don't know enough to say what causes issues with particular stone / grit size combinations, but have read enough to know how much I don't know. It's nice to be able to find all this info online, though.
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