MoClamp Laser Measuring System
Laser head placement for centerline requires attaching the head before you hang the centerline bar. It is not necessary to determine whether you want to measure front or rear of the vehicle first as the head will swivel around for opposite end measurements. You just need to be sure there is ample room above the laser for it to make the swing.
Use the shim to take up the space on the bar so the laser will tighten up properly. Once secure, place the centerline bar into the 90 degree blocks, determine the numbers read the same on the outer edge of the blocks against the centerline bar and tighten. You now have the first centerline bar and laser in place.
Attachment of the second centerline bar and the outer 6 foot support bars are primarily for support of the centerline bars holding the laser heads. They actually do not perform any real measurement operations. They are part of a solid foundation for the lasers to operate from.