Thomson currently has two account systems - one for the website and CAD model downloads, and one for e-commerce. We understand that two logins is an inconvenience and are working to consolidate our systems into one login process. Until we’re able to consolidate the two logins, please follow these guidelines:
Every lead screw, or any shaft, has a rotational speed at which there is a point of excessive vibration/harmonics. The screws resistance is a function of:
Type of mounting (end fixity)
speed is known as the critical speed for the screw. Exceeding this
value may result in excessive vibration. For optimal performance, it is
recommended to operate below 80% of the screw critical speed.