For alignment of rotational shafts, two devices for attachment to circular faces of two shaft segments. Each of the two devices has a laser photoelectric device for ascertaining a dimension of displacement of the two shafts from a desired axis of rotation relative to each other. Each of the two devices having a base surface with two linear contact edges designed to engage with a circumferential surface of a shaft and to ensure alignment between the device and an axis of rotation of the shaft to within a tolerance compatible with alignment tolerances of the shaft. Each of the two linear contact edges includes at least two terminal end regions and a center region together defining a line contact at linear intersection of two surfaces meeting at a non-zero angle linear contact edges designed to affix and release from the shaft surface, and to ensure parallel alignment between the device and an axis of rotation of the shaft to a precision allowing measurements to within tolerances required by machinery driven by the shaft. The base surface of at least one of the devices has been modified from its commercially-delivered condition to provide raised rails designed to improve tactile feedback of to a user of the alignment between the base and an axis of rotation of the shaft, and has affixed thereto two rails designed to improve tactile feedback of to a user of the alignment between the base and an axis of rotation of the shaft. Each base has a magnet and a switch to vary magnetic flux for affixation and release from the shaft surface. Each device has brackets designed to securely and reproducibly position laser photoelectric devices relative to the base and axis of rotation of the shaft. The attaching includes a human placing at least one of the devices slightly askew relative to the axis of rotation of the shaft, and the human gently twisting the device to allow the liner contact edges to seat on the circumferential surface of the shaft, to provide tactile feedback to the human to confirm parallel alignment between the at least one device's laser photoelectronic device and the axis of rotation of the shaft.

A method for positioning a body that has a surface extending along a circular arc, includes: attaching the body to a machine part that is capable of swiveling; attaching a stationary, first distance gauge; attaching a stationary, second distance gauge; determining three first distance values and three second distance values at three defined angular positions of the machine part different from each other; calculating a first offset value, based on the three first distance values and the corresponding angular positions, and a second offset value, based on the three second distance values and the corresponding angular positions; shifting the body relative to the machine part, until the first offset value is determined by the first distance gauge and the second offset value is determined by the second distance gauge within permissible tolerances.

A method for positioning a body that has a surface extending along a circular arc, includes: attaching the body to a machine part that is capable of swiveling; attaching a stationary, first distance gauge; attaching a stationary, second distance gauge; determining three first distance values and three second distance values at three defined angular positions of the machine part different from each other; calculating a first offset value, based on the three first distance values and the corresponding angular positions, and a second offset value, based on the three second distance values and the corresponding angular positions; shifting the body relative to the machine part, until the first offset value is determined by the first distance gauge and the second offset value is determined by the second distance gauge within permissible tolerances.

An alignment apparatus suited for aligning structural members, such as, but not limited to pipes, structural beams, lumber, or any other suitable member. The alignment apparatus comprises a mounting base, an alignment receiver, and a fastening element. The mounting base comprises a first mounting body, a mounting cavity, and a second mounting body. The alignment receiver comprises a first receiver panel, an alignment cavity, a fastening aperture, and a second receiver panel. The mounting base is perpendicularly connected adjacent to the alignment receiver. The first receiver panel and the second receiver panel are vertically connected adjacent to the mounting base. The alignment cavity is positioned between the first receiver panel and the second receiver panel. The fastening aperture traverses through the first receiver panel. The fastening element is selectively connected along the fastening aperture.

An alignment apparatus suited for aligning structural members, such as, but not limited to pipes, structural beams, lumber, or any other suitable member. The alignment apparatus comprises a mounting base, an alignment receiver, and a fastening element. The mounting base comprises a first mounting body, a mounting cavity, and a second mounting body. The alignment receiver comprises a first receiver panel, an alignment cavity, a fastening aperture, and a second receiver panel. The mounting base is perpendicularly connected adjacent to the alignment receiver. The first receiver panel and the second receiver panel are vertically connected adjacent to the mounting base. The alignment cavity is positioned between the first receiver panel and the second receiver panel. The fastening aperture traverses through the first receiver panel. The fastening element is selectively connected along the fastening aperture.

An alignment apparatus for accurately aligning a replacement spindle with a pre-existing axle shaft to facilitate repairing a damaged axle assembly. The alignment apparatus may comprise an axle clamp assembly and a spindle clamp assembly. The axle clamp assembly may be mountable to an axle shaft. The axle clamp assembly may be self-centering and self-aligning. Similarly, the spindle clamp assembly may be mountable to a spindle. The spindle clamp assembly may be self-centering and self-aligning. The axle clamp assembly may be fixable to the spindle clamp assembly. By fixing the axle clamp assembly to the spindle clamp assembly, a desired alignment between the axle shaft and the spindle may be achieved.

An alignment apparatus for accurately aligning a replacement spindle with a pre-existing axle shaft to facilitate repairing a damaged axle assembly. The alignment apparatus may comprise an axle clamp assembly and a spindle clamp assembly. The axle clamp assembly may be mountable to an axle shaft. The axle clamp assembly may be self-centering and self-aligning. Similarly, the spindle clamp assembly may be mountable to a spindle. The spindle clamp assembly may be self-centering and self-aligning. The axle clamp assembly may be fixable to the spindle clamp assembly. By fixing the axle clamp assembly to the spindle clamp assembly, a desired alignment between the axle shaft and the spindle may be achieved.

An alignment tool for use with a solar panel support rack, configured to allow for the easy and rapid positioning of the support rack into proper alignment to receive solar panels.

An alignment tool for use with a solar panel support rack, configured to allow for the easy and rapid positioning of the support rack into proper alignment to receive solar panels.

A high-precision air floating motion platform and method for wafer test, wherein the air floating motion platform includes: a base; a beam installed on the base; a sliding table configured to carry a wafer; a linear motor configured to drive the sliding table to slide along the beam; at least three sensors configured to detect a vertical straightness of the wafer; air bearings including a first air bearing, a second air bearing and a third air bearing; the air bearings being configured for suspension of the sliding table; and a compensation device configured to compensate the vertical straightness of the wafer based on a real-time data detected by the sensors.