After the shafting is erected, comes the setting of machines. The countershafts are first erected parallel to the main line, and with due regard to the location of the machine. The machine is then placed, with its driving shaft parallel to the counter, by use of the plumb line; and the platen, table, or other horizontal surface carefully leveled, in two planes, by wedging up the machine with common shingles. The machine is then secured to the floor by lag screws.
Fig. 257. Method of Using Level for Lining Shafting.
When the machines are very heavy, and stone or masonry foundations are necessary, anchor bolts are built into the foundation at suitable points, or holes drilled for expansion bolts. The machine is then lined and leveled as already suggested. The bottom of the machine, however, is usually a rough casting; the top of the stone foundation is still rougher; and, as the wedges are likely to slip out under the jarring of the machine, a permanent support must be provided. This may be done by pouring melted sulphur beneath the bed. To do this, build a dam of clay or sand all around the bed and about 2 inches high. Melt ordinary stick sulphur or brimstone in ladles, and pour in at several points at once. Keep the space flooded until the dam is well filled, and allow it to harden. This will occur very quickly, after which the dam may be removed and the sulphur cut away from the edge of the machine. Care must be taken that the temperature of the sulphur is as high as possible before pouring. Unless this is done, it will cool and set before reaching the inmost recesses beneath the machine. It will then crumble because of insufficient bearing surface to carry the imposed weight. The sulphur having been properly placed and having set, the nuts are then screwed down on the bolts, and the machine is secure.