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Author Topic: Resurfacing polishing laps  (Read 734 times)

Dihusky

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Re: Resurfacing polishing laps
« Reply #15 on: May 03, 2020, 09:59:33 AM »
Sounds like you found an amazing contact.

Made 80 machines, that's incredible, would love to see what his machines look like.

Giel

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Re: Resurfacing polishing laps
« Reply #16 on: May 17, 2020, 08:05:11 PM »
Quote
Sounds like you found an amazing contact.

Made 80 machines, that's incredible, would love to see what his machines look like.

I asked him for some photo's of his machine, he also makes dop sticks and transfer jigs.
I will post photo's of his stuff within a few days.

I have been cutting two stones on his laps and it has been awesome!
They are made with an extremely hard rubber composite, and have a 3mm thick layer fully filled with diamond on a thick 6 inch backing plate.
They cut very smoothly and fast and are gentle on the stone, they dont chip the stone and the scratches are extremely fine for the grit size that is being used!
He has laps from 1000 grit al the way to to 80 grit.

80 grit you say? for faceting???
You wont believe how amazing that roughs in a big chunk of quartz.
Zero chipping of the culet and zero chipping on the edges of the facets, and a finish that is finer than my 360 steel plated disc.
Yes my 360 plated disc chips facets and the culet much more than his 80 grit disc, and my 360 leaves a much rougher finish!
They cut a bit like nubond discs but much better in the rougher grit sizes.
7/10 micron lap is perfect as a prepolish lap. (approx 1000 grit)
The 7/10 micron lap leaves a finer finish than my 1200 nubond.
I will post about his laps later on with photo's of the laps and the finish they leave on the stone.

I have a new faceting machine that has an endless amount of issues!
He fixed a lot of them for me, I already have a brand new mast system on my polymetric!
The mast base was not level, the mast was way of vertical, there was drift in the height adjustment, and a lot of play in the height adjustment and adjustment knob. Cutting a row of facets at the same height was impossible.
My new friend put on some industrial size linear rails and the whole mast is now tight like a vise!
He put an industrial bearing in the mast base for the rotation.
If I measure the lap and try to bend the top of the mast by hand I can only measure 0,05 mm of play on the lap!
If I let go of the mast it returns to exactly zero every time.
The swivel action from the mast over the lap is also perfect now; within 0,01 mm all over the lap when sweeping the stone over the lap!

I am making some photo's and will post soon about the laps and my adaptations of my new machine.







« Last Edit: May 17, 2020, 08:08:44 PM by Giel »

Rusted

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Re: Resurfacing polishing laps
« Reply #17 on: May 17, 2020, 08:57:15 PM »
That is bad news about the machine, good news that you have it fixed though. I am very wary of buying anything made in USA these days, I have been burnt a few times by badly made crap.

MakkyBrown

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Re: Resurfacing polishing laps
« Reply #18 on: May 17, 2020, 09:23:12 PM »
They sound like nice laps :) Great your sorting out your machine.
MB

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