1) No-load jitter:

c. The shaft is bent or cracked. In addition to solutions such as tightening screws or replacing components, it's crucial to monitor the mechanical integrity of the shaft over time. Periodic inspections and, if necessary, replacing worn-out components can prevent unexpected failures.

2) Load-induced jitter:

a. Belt pulleys or couplings are unbalanced. Regularly checking and balancing these components during routine maintenance can prevent load-induced jitter. Implementing precision manufacturing techniques for these parts can enhance their balance.

c. The transmission belt joint is unbalanced. In addition to balancing the transmission device, using high-quality belts and ensuring proper tension during installation can contribute to a stable operation.