Forwarded Message FollowsFrom: gemcal@ganoksin.com
To: aspler@ganoksin.com
Date: Wed, 18 Sep 1996 13:49:15 +0000
Subject: V I B R A T I N G T U M B L E R
Priority: normal
U S I N G V I B R A T I N G T U M B L E R
A. THE MEDIA
B. THE POWDERS
C. LOGBOOK
D. THE MACHINE.
A. THE MEDIA.
Media is the material that used with the stones. it must be the same
hardens as the stone we polish. the best is to use the off cuts of
the same material. for example Amethyst cabs with Amethyst off cuts.
Please Note:
- the average size of the media must be close to the size of the
stones. 2. if you do various sizes at the same time, you must use
close sizes, e.g.
4x6 5x7 or 8x10 10x12. do not mix size that are too different like
6x8 with 13x18.
the total wight of the media and the stones should be around 3 kg.
the should be around 40% of the total.
the best indication for the polishing action is to see a fast
movement, or quick turning of the media in the machine. if it is too
slow, something is wrong.
- the media is too wet(too much water).
- excessive wieght.
- not enough wieght.
the media should be semi wet, like mud.water should be added when it
gets dry.
when every phase of the rocess is done, the media should be washed,
and the powder should be kept for the next round.
B. Powders.
good news for you!! we use Silicon Carbide or Carborondom(?).
-
run SC # 220, 25gms for 15 hours. add water when needed. check
the surface of the stone every few hours. -
run SC # 360 40 gms for 24 hours. add water.check surface.
-
run SC # 600 40 GMS for 30 hours . " " " " .
-
run Diamantine 20 gms 30 hours . " " " " .
-
rinse with water and light detergent for 1 hour.
the media the stone and the container must be washed carefully
after every run.
THE MOST IMPORTANT THING IS TO KNOW WHEN THE STONE
IS READY FOR THE NEXT PHASE. YOU SHOULD CHECK
THE SURFACE OF THE STONE AND MAKE SURE THAT IT HAS
A UNIFORM TEXTURE! IF SOME PARTS OF THE STONES ARE
DIFFERENT YOU MAY HAVE TO REDO IT.
PLEASE NOTE!
THE ABOVE NUMBERS WILL CHANGE FROM ONE TYPE OF STONE
TO THE OTHER! THESE NUMBERS ARE GOOD FOR CITRINE,
AMETHYST. IF YOU POLISH ANOTHER TYPE, YOU MUST FIND
THE QUANTITIES USING A…
C. LOGBOOK
It is very important to keep a logbook of your production!
you should write all the details. hours, weights of powder, wieght
of media, if you do not keep this book, you will have to find the
way every time…if you doing new type of stone, you can compare
each run and make the necessary changes.
D. THE MACHINE
you can change the amplitude of the vibrations by changing the
position of the wieght on the motor axle. for smaller loads,
you need lower amplitude.
Hemi Englisher
Gemcal Co.,Ltd
gemcal@ganoksin.com englishe@mozart.inet.co.th
http://www.ganoksin.com/kosana/gemcal/spinel.htm