Dopsticks

64 & 48 index Dopsticks

64 index

Of all the jamb peg styles this is would have to the easiest to use. 64 index dopsticks are standard for this machine, Very accurate and easy to use but they must be of good quality as they are the equivalent to a faceting hand piece minus the angle stop and protractor, weight is approx 50 grams.

48 index

This 48 index dopstick is used mainly for trillion cut stones, looks a bit rough in the pic but it is very accurate. The dopped stone position and the indexing works a little differently to the 64 index. Doesn't take long to get the hang of it and then cutting goes quite quickly.

How The 64 index dopstick works, It's easy, quick and accurate.

Main

This is the setting for cutting the 8 main facets on a round brilliant cut.
Each side of the octagon can be divided by the 8 notches, 3 left, 3 right plus the main "0" and 4 which is the star setting half way between mains.

Star

The black dot at the top would represent 64 on a standard 64 index gear as used on a mast machine.
Notch 4 which is half way between the mains which is the star facet setting .

Left Break

The notch marked -2 is the setting for cutting the left break facet, 8 facets are cut at this setting, you have to judge the size of the facet, don't over cut, it's better to keep it a bit small as you can go around again later, doesn't take long

Right Break

The notch marked 2 is the setting for cutting the right break facet, 8 facets are cut at this setting, same procedure as for the left break facet.

The six sided 48 index for trilliants

The 48 index starting position. My indexers are not numbered, just a series of dots. 1 dot for mains, 3 dots for stars and 4 dots for the break facets. the 4 dots next to the main will cut the corner break facets. the outer 4 dots will cut the middles break facets.

Just dots, might be a bit confusing to start with, but once you have had a bit of practice it becomes easy and very fast, just like cutting a SRB only less facets.
To try a new cut I will use wax as in the pic, if you mess it up just add more wax and try again.

This is the actual indexing, my indexers uses dots instead of numbers. The pavilion is up to you. I prefer the step cut, easy and always looks good.
There will be a bit of trial and error getting the angles sorted, but not that hard as the repeatability of the Som style jamb peg is excellent.