carloscinco
fully equipped rock polisher
![*](//storage.proboards.com/forum/images/stars/star_green.png) ![*](//storage.proboards.com/forum/images/stars/star_green.png)
Member since July 2008
Posts: 1,639
|
Post by carloscinco on Aug 11, 2013 20:43:59 GMT -5
|
|
|
Post by Drummond Island Rocks on Aug 11, 2013 20:58:54 GMT -5
I have never seen the half moon pattern before and I rough everything in a 12 pounder. That piece of blue lace is my favorite. nice batch.
chuck
|
|
|
Post by vegasjames on Aug 11, 2013 21:06:36 GMT -5
Nice job, I especially like the 1st petrified wood and the unknown below the blue lace.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,351
Member is Online
|
Post by jamesp on Aug 11, 2013 21:09:13 GMT -5
Beauties Carlos. Taller tumblers do that worse. Taller tumblers under loaded even worse. Those are from excessive velocity. I hate that. Here is a piece of coral from a tire tumbler called the destroyer. It beat the heck out of every rock
|
|
|
Post by Jugglerguy on Aug 11, 2013 22:06:40 GMT -5
I like that fifth one. Those bands look almost like a finger print. I also like the wood a lot.
|
|
carloscinco
fully equipped rock polisher
![*](//storage.proboards.com/forum/images/stars/star_green.png) ![*](//storage.proboards.com/forum/images/stars/star_green.png)
Member since July 2008
Posts: 1,639
|
Post by carloscinco on Aug 11, 2013 22:09:53 GMT -5
Jeez, what a beating on that rock James. I guess I'll quit whining now. It can be waaay worse. I'll try the small tumbler on the most promising pieces. The weird thing is that I don't even notice the half moons until I take their picture in bright sunlight.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,351
Member is Online
|
Post by jamesp on Aug 11, 2013 22:20:57 GMT -5
Yep. That is excessive damage when I was learning the fastest I could tumble coral w/out damaging it. I learned that you can run a 9 inch barrel 60 RPM (one rotation every second). That's very fast. But---you got to keep the barrel 80% full. As the slurry gets thicker, the rock level can lower to 75% full. And a barrel that is 90% full will never damage rocks cause there is no damaging avalanche in the barrel.
Usually the moons occur when the water is clean and thin. Dirty water I better for padding.
And fractures show the dryer the rock gets in most cases.
|
|
carloscinco
fully equipped rock polisher
![*](//storage.proboards.com/forum/images/stars/star_green.png) ![*](//storage.proboards.com/forum/images/stars/star_green.png)
Member since July 2008
Posts: 1,639
|
Post by carloscinco on Aug 12, 2013 5:07:47 GMT -5
Great advice. Thanks. Reminders worth posting above the table where my tumblers are turning. Sort of a Roger's Rules of Tumbling instead of Roger's Rules of Ranging.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,351
Member is Online
|
Post by jamesp on Aug 12, 2013 7:19:47 GMT -5
Too funny. I hate messing up a load. Especially at polish step!
|
|
snuffy
Cave Dweller
Member since May 2009
Posts: 4,319
|
Post by snuffy on Aug 12, 2013 10:19:27 GMT -5
Carlos,I haven't encountered that problem on Brazilians,and I tumble them in 12 lb barrels.Dont know what to say.Nice material and batch.
snuffy
|
|
|
Post by pghram on Aug 12, 2013 13:24:53 GMT -5
Too bad about the damage but you still have some very nice stones in the mix. Best thing is that you can re-run the ones that you are not happy with, they are definately worth the extra time, effort, grit, etc.
Rich
|
|
grizman
freely admits to licking rocks
![*](//storage.proboards.com/forum/images/stars/star_pink.png) ![*](//storage.proboards.com/forum/images/stars/star_pink.png)
Member since July 2011
Posts: 878
|
Post by grizman on Aug 13, 2013 18:12:52 GMT -5
My somewhat limited experience has been when I have too large of stones in the batch. The larger ones just plain strike the other stones hard enough to cause the quarter moon "nicks" in the surface. The issue is that the "moons" are deep enough in the stone that just polishing longer will not be enough. Back to at least 120-200 grit to smooth the nicks out.
|
|
carloscinco
fully equipped rock polisher
![*](//storage.proboards.com/forum/images/stars/star_green.png) ![*](//storage.proboards.com/forum/images/stars/star_green.png)
Member since July 2008
Posts: 1,639
|
Post by carloscinco on Aug 13, 2013 19:29:02 GMT -5
Yep, they're going back to step 1. I've got another 5 with the same symptoms. I'll run a fuller barrel with more smalls this time.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,351
Member is Online
|
Post by jamesp on Aug 15, 2013 7:23:07 GMT -5
Yes Grizman, big stones way add to the problem. Again, filling the barrel more is helpful.
|
|
|
Post by MyNewHobby on Aug 15, 2013 12:07:57 GMT -5
Hey Carlos!!!
Now those marks are a first for me as well. If you figure it out I would be really interested in knowing.
Since slowly getting back to both rotary and vibe, I have become so much more attentive to how my batches are doing along the way.
As Always
|
|
SirRoxalot
freely admits to licking rocks
![*](//storage.proboards.com/forum/images/stars/star_pink.png) ![*](//storage.proboards.com/forum/images/stars/star_pink.png)
Member since October 2003
Posts: 790
|
Post by SirRoxalot on Dec 1, 2013 18:47:47 GMT -5
Listen to the load! Loud rattling means you're going to damage the stones. Add more rock, especially smalls for padding, or thicken the slurry, or lower the speed. Keep an ear out!
|
|