Three-dimensional culture - silkworm rearing machine a total of 62 layers, each layer of four silkworm trays. The equipment is moved up and down by servo motor, the cylinder clamp is placed on the silkworm tray, and the ventilation and temperature of the silkworm room are controlled.

The results are:

1) saving cost and small PLC consumption,

2) saving the occupied volume in the cabinet, simpler wiring,

3) using industrial protocols, stable system