This post follows on from Adam’s problems (pt 1).
So day one was mainly spent setting up the drums, and making the bottom blocks. Today starts with finishing the installation of the other two blocks, before making more components.
The original central tuning rod has been removed from the pedal, and is now actually central held by a guide block. So now I need make a secondary linkage to join that rod to the pedal. I still have an attachment on the pedal, but nothing on the central rod, so this is where I start.
Going through the photos, I take a length of brass stock and the rod end which will go on the end of the linkage rod from the pedal mark everything up and drill lots of holes in it. (There are an awful lot of Rod’s around!) After the smaller perpendicular holes are drilled, the pieces go in the lathe to have the longitudinal hole drilled. The fixings holes are tapped, then the longitudinal hole is reamed to make sure it is round and will fit nicely on the central pull rod (There is only a 0.02mm gap all around so it will be tight). Lastly the components are preassembled.
Next I make the linkage rod which is simple, I just have to run a thread on the end.
Finally I can assemble the parts on the first drum and check that I have all the clearances, which I didn’t.
The problem is that manufacturers make product and forget that they are making musical instruments. A lot of effort is put into making new ranges of more, essentially shit instruments, in an attempt to generate the desire to buy in a limited number of consumers. Very little effort and value is put on the making and assembly of those instruments. Cheap materials are used wherever possible, and because people are expensive, the cheapest possible labour is used. So your pride and joy was probably assembled by monkeys, the dregs of society who get pissed at lunchtime and are still high the morning after. They work for a wage packet, they don’t give a toss about whether the holes are right, it’s the near enough attitude, and near enough is not good enough to make something that makes musical noises.
So when the bowls are put on the cradles, they can be out of alignment by over an inch. I can compensate, or remount the bowls with new holes. I choose to compensate. So in this instance I had remount the connection on the pedal, then make another rod, then further modify the pedal, then reassemble to check, disassemble, modify the pedal………………………..
The final part of this job is Adam’s Problems (pt 3)