Dear orchid members
I have recently get my own simple casting setup in order to do
castings my self rather then ordering from casting companies. Its
faster, cheaper and quality is better this way.
I have choosen small spring-driven centrifugal casting machine
because its cheap, simple, doesnt require electrical power, there is
nothing much to broke and centrifugal casting seems to be better
quality then vacuum(we are talking about small casting machines). I
wanted to buy Kerr Centrifico but cant get them here in Poland. But
I have found chinesse copy of it.
So I have set up everything and already done few casting in silver
and 14k gold. Casting came out nice, everything was good. But I
would not be posting here if there wasnt be any problem, right?
Machine is bolted to heavy bench, balanced before casting each
The problem is I am having side spillage - doesnt matter if I wind
up 1, 2,2,5, 3 or 4 times. I t happens with 25 gram in crucible as
well as with 90gram.
I suspect that it could be problem with crucible (but used few
different and the same thing happens) or broken-arm part of the
machine - stop pin could be "too early" so when machine start to
turn, broken- arn unwind but hitsstop-pin and some of the molten
metal runs out through the side of crucible. But I am not sure about
it and that is why I would like to know if someone expriencet
something like this before, before I will grind some of that
Broken-arm can go about 15 degree past straight. Is it enough? When
Machinestarts to turn I think I can hear that broken-arm reaches
that point. Should it?
I am attaching some pictures of machine and crucible. Or maybe
crucibles are bad - they are also not genuine Wesgo or Kerr crucible
- couldnt find them here.