HAMAR LASER STEALTH Series, General Training Manual

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The T-1600 Non-Magnetic Roll Fixture for the A-1519-2.4ZB Targets
The T-1600 Non-Magnetic Roll
Fixture is used for aluminum, rubber
and stainless steel rolls. Also
available is the T-1601 Tight Space
Roll Fixture/Tram Bar, which uses
two A-1519-2.4ZB Targets to
measure alignment in tight spaces.
The following procedure describes
the setup and procedure for using the
T-1600.
TDC Procedure
Note that the level vials on the target mag base or the T-1600 Non-Magnetic Roll Fixture will find TDC
for most applications where the roll diameter is less than 2 ft. (0.6 m) and when the target post is also less
than 2 ft. (0.6 m). However, when performing roll alignments on large-diameter rolls or when using long
target posts, use the Sweeping Through the Arc Method.
1. Set up the T-1600 and T-1601 as shown in the photograph (or set up the target magnetic base). Make
sure that the level on the fixture is centered, indicating you are close to TDC.
2. If using the T-1600, slowly slide it around the roll while watching the R-1356 display . You will see
the readings start to increase you get closer to true TDC. When you get to TDC, the readings will
stay the same for a short time as you rotate the roll and then start to decrease as you pass TCD – see
Arc Measurement Method - Sweeping Through the Arc on Page 62.
3. If using the mag base, slowly rotate the roll in the same manner. For large diameter rolls that do not
rotate, you will need to slide the mag base in the same way as the T-1600 fixture.
4. The highest reading (most positive) will be at the TDC and this is the value to record.
Checking Drive Shaft Alignment
To check the drive shaft alignment, the L-742W or L-732W is placed either at the end of the drive shaft
or in the middle, depending on the how long it is. The horizontal plane is made parallel to the top of the
closest drive shaft using vertically mounted targets and the vertical scan plane is made parallel to the side
of the same shaft.
Each shaft is checked for parallelism to the reference shaft and aligned accordingly. To check a shaft for
parallelism/colinearity, a target is moved from the reference shaft without re-zeroing, and two
measurements are made, one at either end of the shaft. The difference between the two readings is the
angle of the shaft relative to the reference shaft and the average is how far off center it is from the
reference shaft. Up to 200 ft. of drive shafts can be checked with one setup.
T-1600 Non-Magnetic Roll Fixture