Fixturlaser Cardan Shaft Fixture

  Offset mounted machines need precision   alignment

Fixturlaser Cardan Shaft Fixture Product information (PDF, 627 Kbs)

Machines with cardan shafts are often thought of as insensitive to angular errors between driving and driven shaft. Vibration analyses and experiences from paper industry professionals have proved that this is not. Conventional alignment methods such as straight edges, spanner bars, tape measures and machinist levels cannot provide the needed level of accuracy. When cardan shafts fail machine operation is brought to a standstill; the resulting costs of lost production and personnel non-productive time can be exorbitant. There is also a risk for personal injuries.

Fixturlaser Shaft + Fixturlaser Cardan fixture = precision alignment of cardan shafts
The Fixturlaser Cardan Fixture is a set of fixtures to be used together with the laserbased shaft alignment systems Fixturlaser Shaft²⁰⁰ or the Fixturlaser Shaft³⁰⁰ for alignment of offset mounted/cardan driven machines. The dual-laser system of the Fixturlaser Shaft, together with the Fixturlaser Cardan Shaft fixture, makes precision alignment of offset mounted machines easy to perform.

Stable fixtures perform high accuracy and repeatability
The Fixturlaser Cardan Fixture consists of precision ground items in anodized aluminum for maximum accuracy. The fixture system allows a dummy rotational axis to be set parallell to the driven unit. The Fixturlaser Cardan Fixture is rigid, can be mounted anywhere on the flange and be rotated 360°, which result in high measurement accuracy and repeatability. The fixture can be used on all types and sizes of cardan shafts. The weight of this new and updated cardan shaft fixture is lighter and therefore more convenient to handle.

Userfriendly mounting and alignment procedure
The setup of the fixtures is easy and the design is made to fit all common couplings in the market. In most cases you can utilize the coupling bolts themselves when mounting the arm of the flange. After coarse alignment you continue with precision alignment. The Fixturlaser Shaft system will guide you through the alignment procedure, step-by-step.

• The Mounting
  The cardan fixture comes with a number of attachment methods. The system is designed so that you, in most cases, can utilize the coupling bolts themselves when mounting the arm on the flange. The setup of the fixtures is easy and the design made to fit on all common couplings in the market.
  The illustrations below show that mounting the fixture with two arms is the most flexible setup, which also covers the entire range in terms of offset.

The Coarse Alignment
After mounting the fixture, the lasers are adjusted, representing the rotational centre of each machine. The visible laser beams offer an easy solution for adjusting the movable machine so that coarse alignment is obtained.

1. The difference between the laser spot and the target center on the stationary machine is the angular error of the movable machine.

2. Adjust the movable machine until the laser spot is centered in the target of the stationary machine.

The Precision Alignment Procedure
When using the Cardan shaft program in the Fixturlaser Shaft²⁰⁰ or the Fixturlaser Shaft³⁰⁰ software, only three measurement readings are made: Just touch the Read data symbol, rotate the shafts and touch the symbol again, rotate the shaft a final time and touch the symbol. Now you have established the position of the machine (see screen pictures below). The result can then be stored in the memory or printed to an optional printer and adjustments can be made in both horizontal and vertical plans.

1. The screen shows the movable machine. Insert the A, B and C measurements by touching the A, B and C field on the touch screen.

2. Rotate the TD-units to the 9 o´clock position. Press the 9 o´clock icon to record the value. Rotate the turret on the arm and the shaft of the movable machine and repeat the procedure at 3 o´clock and 12 o´clock.

3. The screen now displays the current vertical position. Evaluate the result. Save and/or print out the result. As the instrument only shows angular misalignment, one of the feet is always set to zero. Adjust the machine.

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