"The gear shown at the bottom of the photo was driven by a worm (John Deere called it a screw, others call it a worm gear) on the main feed shaft
of the drill," he adds.
The process starts by performing screening, fragmentation, and other preprocessing activities on the solid backfill materials at the surface, and then those materials are transported through the feed shaft under rational control.
The working load of the buffering device depends on the falling speed of the solid backfill materials at the bottom of the feed shaft. During the falling process, which is very complicated, the solid backfill materials interact with the air.
But the next day, her regular teacher switched on the lathe for her while she was wearing the scarf shortly after incident and it got caught in the unguarded feed shaft
Part of the air may escape to the sides, but another part will trickle upwards via the feed shaft
. Particularly if the feed is very fine grained and dry, the deaeration may cause a very unstable operation due to intermittent fluidization of the feed an effect well known from earlier potash compacting operations.
Direct control of feed shafts
(top and middle), besides the production of slub yarn, the draft con be set too.