For the reduction gear in the plastic machine tool’s feed system, in addition to requiring its own high movement accuracy and working stability, it is also necessary to eliminate the transmission gap between the paired gears as much as possible; otherwise, each time the feed system is reversed After that, the motion will lag behind the command signal, which will have a great impact on the machining accuracy. Therefore, for the feed system of the CNC machine tool, various methods must be adopted to reduce or eliminate the gear transmission gap.
1. Rigidity adjustment method
The rigid adjustment method refers to the adjustment method in which the tooth gap cannot be automatically compensated after adjustment. It requires strict control of the tooth thickness and pitch tolerance of the gear, otherwise the flexibility of the transmission will be affected. The gear transmission adjusted by this method alone has better transmission rigidity, and the structure is relatively simple.