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 Post subject: Re: Matrix Lap
PostPosted: Sat Jun 08, 2013 8:27 pm 
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Alnitak wrote:
thomas.adamas wrote:
No eraser in this case. Like I said, run a bar of soap over the lap, then scrub with a new wet sponge and rinse with warm water.

I was referring to cleaning the Skyway--is that what you are referring to? Clean it with soap and a sponge?
I did clean the Matrix with the soap and sponge and it worked well. I've used the eraser on the Greenway and Creamway. I assumed it was the same process for the Skyway.
Jeff


I do not use, nor do I recommend using an eraser to decontaminate a lap. Think that out. What are you trying to erase?

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 Post subject: Re: Matrix Lap
PostPosted: Sat Jun 08, 2013 8:43 pm 
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There is history to the Eraser Trick, and it is not as goofy as it sounds. While it may not be the most common way to clean this lap, or the integral oxide types, years ago, it was learned that an eraser will deplete excess diamond from an overcharged lap. It showed up so long ago, it may even have first appeared with the BATT lap.
"Rubber" originally got its name because of its early use as an eraser. Having an affinity for carbon, it was able to remove graphite from writing surfaces:

"The first use for rubber was an eraser. It was Magellan, a descendent of the famous
Portuguese navigator, who suggested this use. In England, Priestley popularized it to the
extent that it became known as India Rubber. "


And it followed that often when running the eraser over a contaminated lap, contaminants also would go away in the eraser crumbs that were produced. So it became on of those internet legends, but it has enjoyed a certain success.

The traditional method of soap scrubbing is still used by most people, and is better especially for quartz-fouled plated laps.


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 Post subject: Re: Matrix Lap
PostPosted: Sat Jun 08, 2013 11:53 pm 
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Gearloose wrote:
There is history to the Eraser Trick, and it is not as goofy as it sounds. While it may not be the most common way to clean this lap, or the integral oxide types, years ago, it was learned that an eraser will deplete excess diamond from an overcharged lap. It showed up so long ago, it may even have first appeared with the BATT lap.
"Rubber" originally got its name because of its early use as an eraser. Having an affinity for carbon, it was able to remove graphite from writing surfaces:

"The first use for rubber was an eraser. It was Magellan, a descendent of the famous
Portuguese navigator, who suggested this use. In England, Priestley popularized it to the
extent that it became known as India Rubber. "


And it followed that often when running the eraser over a contaminated lap, contaminants also would go away in the eraser crumbs that were produced. So it became on of those internet legends, but it has enjoyed a certain success.

The traditional method of soap scrubbing is still used by most people, and is better especially for quartz-fouled plated laps.


I can verify that the eraser trick works quite well, but one has to be sure to use a soft pure rubber eraser.

Jeff

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 Post subject: Re: Matrix Lap
PostPosted: Thu Jun 20, 2013 8:06 am 
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Been Busy.
Playing with the Big kids.

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 Post subject: Re: Matrix Lap
PostPosted: Thu Jun 20, 2013 2:17 pm 
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That is the 14" (35 cm) diameter Matrix?

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 Post subject: Re: Matrix Lap
PostPosted: Thu Jun 20, 2013 2:37 pm 
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What do the people who buy these use them for?? I can't imagine them being used for gems.. polishing silicon wafers comes to mind..

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 Post subject: Re: Matrix Lap
PostPosted: Thu Jun 20, 2013 3:09 pm 
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jleb wrote:
What do the people who buy these use them for?? I can't imagine them being used for gems.. polishing silicon wafers comes to mind..


Gem polishing on CNC machines!

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 Post subject: Re: Matrix Lap
PostPosted: Thu Jun 20, 2013 3:52 pm 
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Yup. Serious multiheaded mass production machines.

For such a new product to be so quickly embraced by the wider industry is non-trivial.


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 Post subject: Re: Matrix Lap
PostPosted: Thu Jun 20, 2013 5:09 pm 
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Gearloose wrote:
For such a new product to be so quickly embraced by the wider industry is non-trivial.


Understatement.

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 Post subject: Re: Matrix Lap
PostPosted: Thu Jun 20, 2013 5:29 pm 
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Quote:
Understatement.


You're right. It's not how I FEEL, but they expect moderation...
Actually I am quite excited about it. :smt026

It's Big.


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 Post subject: Re: Matrix Lap
PostPosted: Fri Jun 21, 2013 8:16 am 
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Gearloose wrote:
Quote:
Understatement.


You're right. It's not how I FEEL, but they expect moderation...
Actually I am quite excited about it. :smt026

It's Big.


Image Non-Trivial.Image


That's what she said. :lol:

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 Post subject: Re: Matrix Lap
PostPosted: Mon Jul 15, 2013 10:17 am 
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I have had inquiries about OMF/Fantasy machine mandrels, and have supplied both Zane and some Fantasy dealers with blanks in various materials.
I have increased the lengths of the active area to accommodate the Fantasy machine's longer stroke.
I used to make and stock OMF mandrels years ago, but Zane standardized the sizes to Metric, and I decided not to retool for it, but supplied blanks the manufacturer could machine and stock.

Because it takes existing businesses a while to catch up, I will supply them in my materials as special orders, and maybe someday will stock popular sizes...WHEN I find out what they are.

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Diamond machined to a tolerance of +/- 0.05 mm or better.


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 Post subject: Re: Matrix Lap
PostPosted: Mon Jul 15, 2013 2:27 pm 
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I will have a limited number of Gearloose mandrels in several sizes and materials for the Fantasy Machine available at the Franklin Faceters Frolic July 26th and 27th. See www.franklinfacetersfrolic.com for complete information on dealer, speakers, and GemCad classes.

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 Post subject: Re: Matrix Lap
PostPosted: Sat Oct 12, 2013 10:08 pm 
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I can FINALLY get a good polish on Matrix!



Prepolish: 3k/BATT

Polishing compound: 60k Diastik, enough for the lap to look sky blue, but not enough for there to be goop

Extender: WD-40, almost none; I sprayed WD-40, wiped it all off, then added diamond

Pressure: zero vertical pressure, horizontal pressure to move the stone only

Speed: "5" on an Ultra-Tec V5, sweeping one arc every 2 seconds, for 6 arcs


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 Post subject: Re: Matrix Lap
PostPosted: Sun Oct 13, 2013 10:51 am 
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That's pretty much my sequence:

1) 3k BA5T
2) Spray a little WD-40 on a paper towel and wipe across the slowly running Matrix. This isn't as much for lubrication as it is to remove anything left over from the last polish session and evenly distribute the diamond remaining.
3) Lightly charge with 60K Diastik (basically the minimum amount I can successfully get to stick out of the tube) across the whole lap while it runs slowly.
4) A few drops of Snake Oil directly on the stone.
4) I run at 800 instead of 500, but yeah, no real downward pressure beyond that needed to keep the stone touching the surface evenly. Add more drops of Snake Oil to the stone as needed, average once per tier.

It rarely takes more than 2-3 sweeps.


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