You are not logged in.

  • Register to access all forum features  

#51

Dihusky
Member
From: Gold Coast, QLD
Joined: 16 June 2017
Posts: 1,519
Member
19 May 2020 09:12 pm

xcvator wrote:
Dihusky wrote:

Even the expensive horizontal cabbers chuck water, welcome to the club smile Wait till a stone hits it, you'll get even more wink

Maybe I should set up 1 of those clear laboratory cupboard things with arm holes big_smile

I think it is time for a 'Man Cave' smile

3 users like this post: LoneWolf, Martyz, goody2shoes

#52

LoneWolf
Member
From: Gold Coast, QLD
Joined: 12 April 2016
Posts: 4,855
Member
19 May 2020 09:13 pm

Bolder Opal would have to be the most Dirtiest stuff to play with... Im sure, one of our past rentals still have the stained roof and walls in the garage from My lapidary... smile

LW....


Growing Old is Inevitable.... Growing Up is Optional.... Union Proud and Union Strong... A.M.W.U Active Member....

2 users like this post: Martyz, goody2shoes

#53

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
19 May 2020 09:48 pm

shouldn't have sold my scuba gear then ?

3 users like this post: LoneWolf, goody2shoes, CreviceSucker

#54

LoneWolf
Member
From: Gold Coast, QLD
Joined: 12 April 2016
Posts: 4,855
Member
19 May 2020 09:53 pm

smile Its Fun tho xcvator, The rewards far outweigh the Mess... lol

I have seen a Plastic tent used for a cabbing set-up inside... Worked well, but looked horrible in the house... smile

LW...


Growing Old is Inevitable.... Growing Up is Optional.... Union Proud and Union Strong... A.M.W.U Active Member....

#55

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
23 May 2020 07:00 pm

Got these ready today

1590218538_img_20200523_171509.jpg

Tomorrow I'll glue the foam on these ( 8 of them, thanks Rock Rat thumbsup )

1590218591_img_20200523_171532.jpg

And then I can glue these on

1590218641_img_20200523_171525.jpg

So my grit range will be 80,180,400,600,800,1200

This W'n'D was from the BGS, but this place has grits up to 7000
https://www.thesandpaperman.com.au/wet- … er-sheets/

A friend of mine is an ex upholsterer and has some off cuts of soft leather that I can use for polishing.
So the question is, should I just go finer and finer with W'n'D or go for the leather after the 1200 grit sandpaper
and what should I use on the leather for polishing ?

Are there any really bad gaps between the grits ?

Yes, this is an interrogation smile

Last edited by xcvator (23 May 2020 07:06 pm)

#56

RockRat
Member
Joined: 26 May 2018
Posts: 369
Member
23 May 2020 07:54 pm

hey Keith, just do one with the foam and paper first and try it out, could rip.
I'd put the paper straight onto the plastic disc, sand paper the disc first to give the glue some adhesion.
Not an expert, just the way i see it.
good luck

#57

Dihusky
Member
From: Gold Coast, QLD
Joined: 16 June 2017
Posts: 1,519
Member
24 May 2020 10:53 am

xcvator, more than enough to get you started. thumbsup The grits are going to depend on the material you're working with, you will probably find you'll move to diamond frisbies on a magnetic backing fairly soon as these will work a lot quicker, plus you'll be looking for diamond grit for stages of pre-polishing on a softer backing to help you can produce a smooth surfaces instead of trying to polish out a series of little flats.

If you were using a drum system, the typical sequence would be 2 or three hard wheels to do your primary shaping before moving to 2 or 3 soft Nova wheels for final smoothing, pre-polishing and finally polish before finishing on cerium or tin oxide to achieve the high gloss.

This would be the typical arrangement for Agate, fossilised wood etc, opal as it is softer is a different sequence, or is for me.

Your next piece of equipment, you may already have one, is a wet diamond saw, thin sintered blade as they outlast plated. This is for tour primary shaping before you hit the laps. An inexpensive tile saw works well depending on the size of the material.

1 user likes this post: xcvator

#58

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
25 May 2020 04:58 pm

Any clues on what the thread is on this ? It just fits through a 12,7 mm hole in a washer but it doesn't fit, 1/2 inch whitworth or m 12

1590386272_flexible_hose.jpg

#59

Pro-oz
Member
From: Cairns, QLD
Joined: 04 June 2014
Posts: 287
Member
25 May 2020 07:42 pm

I should know, but to long ago now It looks like BSP, 3/8 BSP maybe. 1/2'' BSP for such a small pipe would probably be to big. So either 1/4 or 3/8 BSP I would recon.
This reminds me of work! haha.

Cheers


Minelab Explorer SE. Minelab GPZ 7000 Equinox 800

1 user likes this post: xcvator

#60

Dihusky
Member
From: Gold Coast, QLD
Joined: 16 June 2017
Posts: 1,519
Member
25 May 2020 07:49 pm

Prooz wrote:

I should know, but to long ago now It looks like BSP, 3/8 BSP maybe. 1/2'' BSP for such a small pipe would probably be to big. So either 1/4 or 3/8 BSP I would recon.
This reminds me of work! haha.

Cheers

They are BSP, will fit any of the brass air fittings, look for a hose tail with a female BSP fitting, 3/8 Female BSP to 6mm hose, Super Cheap or any auto parts shop will have them

1 user likes this post: xcvator

#61

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
25 May 2020 07:55 pm

Thank you gentlemen, didn't think of bsp

#62

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
26 May 2020 09:02 pm

That worked thumbsup bsp's
Big day tomorrow, off to Crystal World to get a couple of bits of play dough rocks, cut some dowell up for dop sticks and try out the https://www.bunnings.com.au/ozito-10w-t … n_p6290184 ( no expense spared there big_smile )

#63

RM Outback
Member
Joined: 10 March 2016
Posts: 7,067
Member
26 May 2020 09:49 pm

xcvator wrote:

That worked thumbsup bsp's
Big day tomorrow, off to Crystal World to get a couple of bits of play dough rocks, cut some dowell up for dop sticks and try out the https://www.bunnings.com.au/ozito-10w-t … n_p6290184 ( no expense spared there big_smile )

Yeah most plastic is BSP when it comes to plumbing threads these days. Keen to see your next post thumbsup looking forward to it beer

#64

Martyz
Member
Joined: 02 January 2019
Posts: 160
Member
26 May 2020 10:33 pm

Hey Xcvator,
I’ve only just started using a machine and until now most of what I did was using diamond plates and sandpaper by hand. I figured out pretty quickly that sandpaper isn’t that durable when cabbing unless you use it gently and with stones of appropriate hardness.
If you’re using a corundum or silicon carbide sandpaper it should cut stones with a Moh scale hardness up to 9 (sapphire) but this will be a struggle. I’m not sure where you’re at with understanding where different materials sit in the Moh scale but I’m thinking that for your setup you probably want to look at material less than 8 (eg <topaz). Quartz (7.5) you may even find hard on your disks. Labradorite and opal are nice to work with (about 6.5) and should shape and polish successfully.
You should be able to research which stones sit within this range or ask at the crystal shop. It might just be the difference between getting some pleasing early results or damaging your new toy.
Good luck.

2 users like this post: xcvator, Dihusky

#65

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
27 May 2020 04:38 pm

Well an interesting day to say the least. Went to Crystal World, great range but boy, couldn't it get to be expensive, $3-00 for a bit of rose quartz 3/4 the size of a 20c piece and 4mm thick

Got the speed low enough to stop 80% of the spray thumbsup but the motor tended to slow down when I pressed hard enough to see any cutting effect with 80 grit paper, slow going.
A couple of weeks ago I lashed out and bought 1 cheap 8" diamond disk, 150 grit, so I dropped that on top of the acrylic disk and gave that a run, what a difference yikes yikes Cut like a hot knife through butter, much lighter touch and the motor DIDN'T SLOW DOWN. Probably helped by a bit extra weight to keep it spinning as well thumbsup
Looks like I might have to buy a few more diamond discs cry
I think an 80 for preforming and a 600, then save the paper discs for polishing.

Thoughts ?

1 user likes this post: LoneWolf

#66

Dihusky
Member
From: Gold Coast, QLD
Joined: 16 June 2017
Posts: 1,519
Member
27 May 2020 05:02 pm

Polishing is an art form sad Different material will require different compounds, for example: Opal I go from 3k diamond on a soft wheel to Cerium, Agate I go up to 50K diamond on a soft wheel to Cerium, Sapphire cabs I finish on 50k diamond using a 8k diamond prepolish, both off soft wheels. Welcome to "The learning" smile

Last edited by Dihusky (27 May 2020 05:03 pm)

2 users like this post: LoneWolf, CreviceSucker

#67

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
27 May 2020 05:57 pm

The I think finished product, speed controller is at the back out of site

1590562563_img_20200527_162059.jpg

1590562600_img_20200527_162111.jpg

1590562618_img_20200527_162147.jpg

Last edited by xcvator (27 May 2020 06:01 pm)

6 users like this post: Dihusky, RockRat, Martyz, LoneWolf, Mackka, Wishfull

#68

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
27 May 2020 05:59 pm

Dihusky wrote:

Polishing is an art form sad Different material will require different compounds, for example: Opal I go from 3k diamond on a soft wheel to Cerium, Agate I go up to 50K diamond on a soft wheel to Cerium, Sapphire cabs I finish on 50k diamond using a 8k diamond prepolish, both off soft wheels. Welcome to "The learning" smile

Opals, Saphires, I'm a pensioner sad lol

2 users like this post: Dihusky, LoneWolf

#69

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
29 May 2020 06:45 pm

Well I blew my pension and ordered these in 80, 320 and 600

1590738283_diamond_discs.jpg

Hope I'm still around by the time they get here lol

2 users like this post: Mackka, Dihusky

#70

Martyz
Member
Joined: 02 January 2019
Posts: 160
Member
29 May 2020 08:50 pm

You won’t regret it. If you plan on doing a bit of cabbing you would eat that money up in sandpaper pretty quickly. These should last longer and work better.

#71

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
11 June 2020 04:56 pm

Well, 3 diamond discs delivered today from China 14 days from order to delivery, got to be happy with that thumbsup

1 user likes this post: LoneWolf

#72

Pat Hogen
Member
Joined: 02 January 2018
Posts: 336
Member
11 June 2020 07:29 pm

Well, good luck in your cabbing. Be careful of using 80 grit on most of you stones, agate may handle it better than any of the crystalline group. 80 grit tends to rip rather than rub. Start of with your 320 and see hoe that performs. One thing, don't be in a hurry and don't 'push' your stones to get into shape. A little time taken will have greater results.


Absinthe makes the heart grow fonder

1 user likes this post: xcvator

#73

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
11 June 2020 08:04 pm

Pat Hogen wrote:

Well, good luck in your cabbing. Be careful of using 80 grit on most of you stones, agate may handle it better than any of the crystalline group. 80 grit tends to rip rather than rub. Start of with your 320 and see hoe that performs. One thing, don't be in a hurry and don't 'push' your stones to get into shape. A little time taken will have greater results.

Yeah, I've got to be pretty carefull Pat, the motor isn't very powerfull and if I put too much pressure on it, it stops big_smile I'm going to have to be patient and take my time beer

#74

Dihusky
Member
From: Gold Coast, QLD
Joined: 16 June 2017
Posts: 1,519
Member
11 June 2020 10:22 pm

There was an interesting article in Facet Talk a few months ago discussing the depth of damage to a stone based on grit size. It was based on Quartz so the figures will vary according to the hardness and brittleness of the material your cutting.

80 grit, damage 2.6mm deep, 180 grit - 0.86mm deep, 220 grit - 0.6mm, 325 grit - 0.3mm, 600 grit - 0.16mm, 1200 grit - 0.07mm, 3000 grit - 0.03mm.

What this means it if you cut with 80 grit then go to 180 grit to remove the 80 grit scratches, you will be cutting to a minimum depth of 3.46mm ( 2.6 + 0.86). This is why you have to select the laps carefully as you have to remove all the damage/pitting & scratches from the previous lap before going finer otherwise you'll be hard pushed to get a really good polish.

You'll enjoy watching the development of your first stone, make sure you have a good magnifier.

4 users like this post: xcvator, Mackka, LoneWolf, CreviceSucker

#75

xcvator
Member
From: Mornington Peninsula
Joined: 12 September 2016
Posts: 1,941
Member
12 June 2020 09:41 am

Dihusky wrote:

There was an interesting article in Facet Talk a few months ago discussing the depth of damage to a stone based on grit size. It was based on Quartz so the figures will vary according to the hardness and brittleness of the material your cutting.

80 grit, damage 2.6mm deep, 180 grit - 0.86mm deep, 220 grit - 0.6mm, 325 grit - 0.3mm, 600 grit - 0.16mm, 1200 grit - 0.07mm, 3000 grit - 0.03mm.

What this means it if you cut with 80 grit then go to 180 grit to remove the 80 grit scratches, you will be cutting to a minimum depth of 3.46mm ( 2.6 + 0.86). This is why you have to select the laps carefully as you have to remove all the damage/pitting & scratches from the previous lap before going finer otherwise you'll be hard pushed to get a really good polish.

You'll enjoy watching the development of your first stone, make sure you have a good magnifier.

That actually made sense to me, thanks Dihusky thumbsup

1 user likes this post: Dihusky

Top