Two-axis rotation method for flatness error

The two-axis rotation method uses two maximum point lines and two minimum point lines as two rotation axes, and simultaneously rotates the original data of each measurement point on the surface to be tested, so that the distribution pattern of the maximum point and the minimum point conforms to the minimum containment area. One of the criteria for determining the flatness error value. Because the method has two sets of rotation axis position and rotation quantity values ​​at the same time, which makes the data transformation more simple and simple, the JJG117-91 plate verification procedure adopts this method. The result of this method is determined by the determination of the axis of rotation and the amount of rotation. The determination of the rotation axis and the amount of rotation is related to the correctness of the selection of the maximum and minimum points. The maximum point and the minimum point are usually referred to as extreme points. Therefore, quickly and accurately determine the four extreme points, is

Self-Recovery Rapid Door

High Speed self-Recovery Rapid doors are the technological evolution of old, PVC high speed doors or heavy folding doors, now obsolete and not suited to today's industrial needs.

High-quality panels, the resistive safety edge fitted to the bottom edge of the door, photocells and barriers make this product both safe and durable, being totally self-repairing, thanks to its special [Anti Crash System".

This door designed with a perimeter structure in galvanized or stainless steel, which is ideal for sliding panels. The door panel rides effortlessly within a track, thanks to the special profile and hinge designed by us, requiring low maintenance. The panel is rolled up on a roller placed within the upper crossbeam.

The door can be equipped with a counterweight or ups batteries, to fully open the door in case of power failure, and can also be equipped with large transparent sections to create a brighter and safer working environment.

Self-Repairing Door Curtain made of reinforced PVC, with flexible weighted soft bottom edge.

The edge of curtain has continuous injection molded teeth that then move up and down in a self-lubricating polyethylene track attached to structural galvanized side frames.

Self-Recovery Rapid Door,Self Recovery PVC Rapid Door,Self Recovery Rapid Rolling Door,Self Healing Roll Door

Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hffastdoor.com