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Messages - Chris.Botha

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91
here are some pics from the next rhinocam video im on, simple flip works and 4 sided multi index.













92
;)

the reason i never discuss that is because its a complex question depending greatly on the post casting production that will be required on the piece.

If i am simply producing a piece that will be cast and finished directly i usually allow around 1.5% to 2% to allow for the small shrinkage that happens at cast time, but if its going to be vulcanised and recast the cats really out the bag, and up the tree, with the wifes best bacon bits and the pastors wig...

cutting masters and allowances in the original model can vary greatly with as many iterations as their are jewellers. rubber moulds have linear shrinkage for example so scaling has to be directional as well as general etc etc etc.. but metal mould processes are completely different again.. so .. no easy answer im afraid ....

too complex to cover in a single mere post, and a great many boos on lost wax casting cover all these issues :)

93
Thanks :)

94
here is the link to the RhinoCam tutorial guys :), (thank you Ken for hosting :) )

http://3dcadjewelry.com/ThreeSidedCuttingRC2.mp4

95
here are the earrings from an earlier post about remelt issues with wax :) alls well that ends well!




96
The file is uploading to a ftp on 3dcadjewelry.com as we speak. Its 300mb big so need to host their. We have shared members, perhaps once its posted some kind soul will download and reupload to a private accessible ftp for use here.. my connection SUCKS.. 15kb/s up... :(

97
Some pics of a job off Gertrude, used for the RhinoCam+Minitech 3sided tutorial I just finished ;)










98
this ones wax is one page back :)



99
here is the specs on it. It can cut metal and runs up to 30 000 rpm, I however only ever cut plastics wax and on the od ocasion AL.

http://www.artcotools.com/nsk-e2530-series-combination-system-30000-rpm-pr-16759.html

100
NSK 2530E and yes its whisper quiet :)

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