|
Post by BuiltonRock on Jan 13, 2008 16:19:24 GMT -5
I am bumping this as alot of the regular cabber have not replied. john
|
|
|
Post by sbreed on Jan 13, 2008 17:38:21 GMT -5
What kind of wood was used, or does it matter?
|
|
|
Post by BuiltonRock on Jan 13, 2008 17:45:09 GMT -5
We used pine, but I think redwood would be the best. john
|
|
mike4bears
spending too much on rocks
Member since December 2007
Posts: 275
|
Post by mike4bears on Jan 13, 2008 21:42:30 GMT -5
great post i have heard of using wood. i would like to know the rpm of the motor. from the look of it. i would say 1800.
|
|
|
Post by BuiltonRock on Jan 13, 2008 22:43:17 GMT -5
Mike, It turns at 3450 rpm!! john
|
|
|
Post by Tonyterner on Jan 14, 2008 11:35:07 GMT -5
Mike I sized John's smaller to compensate for the fast motor speed.
|
|
mike4bears
spending too much on rocks
Member since December 2007
Posts: 275
|
Post by mike4bears on Jan 14, 2008 13:44:45 GMT -5
thanks. and i just saw the rpm. i miss it before. I'm ex machinist. and i have a tenancy to think in fps. which is what you were thinking tony. by making it smaller. have you done machine work. i know that you didn't use water. sometimes when I'm using diamond paste i will use a silicon spray lubricant. have you tried that mike
|
|
rallyrocks
fully equipped rock polisher
Member since November 2005
Posts: 1,507
|
Post by rallyrocks on Jan 14, 2008 14:30:28 GMT -5
Adrian, I did go from 600 to 14K. When I use up the paste I have, I may reconfigure to 1200, 14k and 50K. john I've found that 3000 and or 8000 really help with the transition to 14000, and 1200 after 600 is really a worthwhile step too. But I have to say, a rig like this sure looks a lot more efficient, and for that matter considerably more fun to run than stopping to change belts every step. I'm thinking of getting the "commercial" spool rig that was posted on another thread around here...
|
|
|
Post by Tony W on Jan 15, 2008 16:40:32 GMT -5
John, that is working like I hoped it would. What a great polish for sodalite. I have a bunch I can't get a good shine on. I can't wait to use mine on opal. I was a bit suspicious of you and Tony going with the one spindle but now I see it set up I think it was a very good plan! Good on you both!! Folks, the idea came from the Lopaki site ... www.lopacki.com/howto/ read down the how to make a bead page... he uses honing oil with the diamond powder... which is what got me interested as I use diamond powder. John, Tony and I decided water just wouldn't work as, of course it will degrade the wood quickly, but diamond paste using silicone, or something like it, as a vehicle seems to work well for john. My guess is you just want to watch the heat since you won't have to cooling from the water, and I think you better wear a mask even if you don't see any dust from polishing...... it has to be there. I'm going to run mine at about 1100 rpm on my Lortone arbor so I will let you all know how mine works when I have experimented a bit. I can also run my wheels at 1750 so I will see if there is any diff. using two speeds. Super John and Tony! Good work. Tony
|
|
|
Post by BuiltonRock on Jan 15, 2008 19:55:55 GMT -5
Tony Dub, I did not mean to leave you out of the Loop. As you were the catalyst for this whole deal, but I figure when you get the single wheels going we will see a similar thread. I was amazed that there was not much heat at all on that cab, probably has to do with the amount of surface contact, way less than a rubber drum. I did not use any oil yet, I think Lopacki used light oil and I will give a dab of that a try I want to get back down there and try a harder rock and see what happens. Can't wait to see yours!! I think I need another one ;D ;D I could have a 3 spool spindle-lap on each side of that grinder with one side say 1200, 3K and 8K then on the other 14K, 50K and 100K paste. Nothing like overkill ;D ;D ;D john
|
|
|
Post by Tony W on Jan 16, 2008 1:05:36 GMT -5
Lol, I'm not out of the loop..... if we had waited on me to get the ball rolling we'd still be looking for the ball I am going with individual wheels.. I guess mainly because I was worried with cross contamination.. but after seeing what you two came up with made real, I'm jealous And, I'm amazed you don't get much heat at that speed. Tony was smart to adjust size for speed. Now, if we could just help Tony get his rig going ... I worry he isn't grinding on rock, but back playing with wood T
|
|
|
Post by Tonyterner on Jan 16, 2008 10:36:21 GMT -5
Tony, thanks for the concern. I just have to find some time, do you have any to spare. LOL Somebody asked if I had done any machining. No I haven't but with woodturning I learned that the speed of the wood going past the tool was the important speed. Seems rock people don't think that way. Then again they really only have 2 diameters, 6" & 8", to worry about.
|
|
|
Post by captbob on Jan 17, 2008 22:57:12 GMT -5
|
|
deedolce
fully equipped rock polisher
Member since October 2006
Posts: 1,828
|
Post by deedolce on Jan 20, 2008 17:38:10 GMT -5
Another question about charging...do you add the diamond compound straight out of a syringe, or do you need some kind of lube too? I'm really interested in trying this! I got some jade from Nephrite, and of course the chrysocollas from DesertDweller, and can never really get a shine. Thanks!
|
|
|
Post by BuiltonRock on Jan 20, 2008 18:35:40 GMT -5
Deedolce, I applied it straight out of the tube and spread with my finger. I then put a little extender fluid on and will probably need to do that each time. john
|
|
thomtap
starting to spend too much on rocks
Member since December 2007
Posts: 237
|
Post by thomtap on Jan 20, 2008 20:09:35 GMT -5
Where do you find the 100k diamond paste?
Thom Tapp
|
|
|
Post by captbob on Jan 20, 2008 23:30:18 GMT -5
Hi Thom, I get my diamond compound (it's in small syringe applicators) from Kingsly North. There may be less expensive places, but it's not something I need a bunch of, so I haven't looked further.
They have a website or you can call them at 800 338-9280 and they will send you a catalog at no cost. It's a nice catalog to have around, but not always the cheapest place to buy.
|
|
|
Post by Jack ( Yorkshire) on Jan 21, 2008 3:46:12 GMT -5
Hi all,
I read someone said the lap motor ran at 3450 rpm , the wood lap would run at a different speed due to its size, ( wood Size to motor spindle size)
No it wouldnt lap speed 3450 RPM but the difference is in the Surface speed, (Area traveled)
The difference is surface speed as Mike 4 bears states ( feet per second).
Its the same when tumbling if some one has a barrlel turning at 25 rpm and some one at 50 rpm the feet travled by the second barrel is greater and more work is done by the grit = less days on the tumbler.
In this case 6 days at 50 RPM But 12 days at 25 RPM
This would be the same for the lap as well (surface area Traveled)
Pease correct me if wrong ,
On this lap , The results are terrific I have had difficultie in getting sodalite polished with a decent polish not to mention the high gloss shown here
This is a definate" make " for me this year
Thanks John and Tony for a great little gadget.
Jack Yorkshire UK
PS
Mike Can you put this gadget in the proper section ? Lapidary tips Its far to good to get lost in the history on the general board
|
|
|
Post by connrock on Jan 21, 2008 5:29:49 GMT -5
For many years the old wood salad bowls have been used for an inexpensive lap.People find them at tag and garage sales.etc.
They're easy to mount directly to a motor and the curve of the bowl gives you different surface speeds so it's kind of like an adjustable speed lap.
Pretty neat!
I think that's where the idea of the multi wheel lap came from??
Had to start in someones back yard,,,,as usual!
I would imagine that different wood would act differently but the outcome would be that same as long as there is some way to control the surface speed.
Jack (Yorkshire) hit it right on the nose as far as surface speed goes.That's the key!
I just had a TERRIBLE thought!!!
After reading my post here all I could think of is that someone may think I am trying to knock down this GREAT idea you guys have come up with!!
PLEASE believe me,,,I AM NOT!!
I just thought a little more input may help!
I mean,,,,the proof is in the puddin and those polished cabs are the "puddin" !
connrock
|
|
|
Post by BuiltonRock on Jan 21, 2008 7:58:42 GMT -5
Conn, your input is geat. Salad bowl would be perfect and as you said adjustable. As it turns out (pun intended) TonyTerner turns salad bowls.
Surface speed is a big issue and I had this old bench grinder which is not adjustable, so Tony made the diameter small. I think it runs a little fast but we are planning to tweak the whole setup! john I am not sure what the ideal surface spped would be??
|
|