Sometimes you need to be lucky. The balancing company I found does not only have their premises close to me but the owner is the father of a couple of girls that are friends of my daughter, plus he has a very experienced man operating the balancing machine, Mr. Weber.
He started by re-arranging the Schenck balancing machine to accept my crankshaft and to rotate it at a very low rpm. Then the counterweights were placed 180 degrees opposite the crankpins and temporarily fixed with a sticky gum and masking tape. A great deal of time was spent moving the weights around, cutting them into smaller pieces and experimenting with various locations. Finally Mr. Weber was happy and sent me off to the welder to permanently fix all 3 pieces that he had ended up usingended up using.
Back from the welder the crank was again put on the balancing machine for final surgery.
Below are a few pictures showing the finished product. The flywheel and counterweights are actually in line with each other, it is the camera that causes the funny look.
Drive side pork chop heavily ground. Mr Weber preferred that to adding material on the opposite side. Maybe it does not look very good but since the crank is going to be hidden from everybody´s eyes in the crankcase – who cares?
More pork chop grinding on the opposite side
And below you see a very small counterweight sitting all alone far away from the others. I think this was put in there to counter the lateral vibrations caused by the slightly wobbling flywheel. End of a long journey.
Time to get it undressed, fit connecting rods and stick it into the crankcase for further engine build.