HAMAR LASER L-702 User manual

WARRANTY
Hamar Laser Instruments, Inc., warrants each instrument and other articles of
equipment manufactured by it to be free from defects in materials and
workmanship under normal use and service, its obligation under this warranty
being limited to making good at its factory any instrument and other article of
equipment which shall within one year after shipment of each instrument and
other article of equipment to the original purchaser be returned intact to Hamar
with transportation prepaid, and which Hamar’s examination shall disclose to
Hamar’s satisfaction to have been thus defective; other than this express
warranty, Hamar neither assumes nor authorizes any other persons to assume for
it any other liability or obligation in connection with the sale of its products.
This warranty is not applicable to instruments or other articles of equipment
manufactured by other companies and limited by a warranty extending for less
than one year. In such an event, the more limited warranty applies to said
instrument or article of equipment.
This warranty shall not apply to any instrument or other article of equipment
which shall have been repaired or altered outside the Hamar factory, nor which
has been subject to misuse, negligence, or use not in accord with instructions
furnished by the manufacturer.
The software described in this manual is furnished under a license agreement and
may be used or copied only in accordance with the terms of the agreement. It is
against the law to copy the software on any medium for any purpose other than
the purchaser's personal use.
The information in this manual is subject to change without notice. No part of
this manual may be reproduced by any means, electronic or mechanical, without
written permission from Hamar Laser Instruments, Inc.
© Copyright Hamar Laser Instruments, Incorporated, 2019
5 Ye Older Road, Danbury, Connecticut 06810

Table of Contents
L-702/L-702SP Spindle and Multi-Turn Alignment System........................................................................1
System Features ........................................................................................................................................1
Hardware Overview......................................................................................................................................2
Model L-702/L-702SP Spindle Laser.......................................................................................................2
Laser Control Panel and Functions..................................................................................................3
L-702/L-702SP Laser Dimensions ..................................................................................................4
The T-261A Four-Axis Target..................................................................................................................5
The R-358 Computerized Interface...........................................................................................................5
Hamar Laser’s Lathe9 Alignment Software .............................................................................................5
Interpreting the Plus and Minus Signs in the Live Displays............................................................5
Preparing for an Alignment ..........................................................................................................................7
Hardware Mounting..................................................................................................................................7
Maintenance and Cleaning........................................................................................................................7
Tools and Equipment................................................................................................................................7
Other Considerations.................................................................................................................................7
Qualifying Lasers and Target Calibration.................................................................................................8
Installing the (RS-232) USB to Serial Converter Cable Driver ................................................................9
Connecting to the R-358 Computer Interface.........................................................................................10
Qualifying the L-702 Laser Beam to its Mounting Stud.........................................................................11
Qualifying the L-702 Laser Beam to a Spindle AOR.................................................................................12
The NORMIN Method............................................................................................................................12
Adjustments ............................................................................................................................................13
Pitch/Yaw Adjustment...................................................................................................................13
Hardware Requirements..........................................................................................................................13
Spindle Qualifying Procedure Using Lathe9 Software...........................................................................14
Setup ..............................................................................................................................................14
Measuring Cross-Slide Squareness and Straightness with L-702SP ..........................................................18
Switching L-702SP Turret to Scan Mode...............................................................................................19
Procedure to Measure Cross-Slide Squareness/Straightness ..................................................................20
Procedure to Measure Multi-Turn Machines for Squareness and Straightness..........................................22
Appendix A – The NORMIN Method (Bore and Spindle).........................................................................26
Appendix B – Qualifying the Laser............................................................................................................28
The NORMIN Method............................................................................................................................28
Adjustments ............................................................................................................................................29
Manual/Software-Assisted Qualification................................................................................................29
Hardware Requirements.................................................................................................................29
Manual Qualifying Procedure........................................................................................................29
Adjusting the Laser Angle.............................................................................................................30
Appendix C – Target Calibration................................................................................................................31
Calibration Setup.....................................................................................................................................31
Calibrating a Center-Only Target............................................................................................................33
Calibrating a Center-and-Slope Target ...................................................................................................34
Appendix D –Troubleshooting Guide.........................................................................................................35
Appendix E – Care and Cleaning of Target Optics.....................................................................................36

1
L-702/L-702SP Spindle and Multi-Turn Alignment System
The L-702/L-702SP 4-Axis Spindle & Multi-Turn Machine Alignment System is a complete alignment system for
aligning spindles on lathes, turning centers and multi-turn machines. There are two configurations:
•L-702 – This version is used only to
align spindles to subspindles, check
flatness and straightness of the lathe
and turning-center guideways, and
alignment of headstocks to tailstocks.
It can also be used to check the
parallelism of the headstock to the
lathe-bed guideways.
•L-702SP – This version adds an
automatically rotating turret that
sweeps a laser scan plane that is
perpendicular to the spindle laser,
which allows the capability to check
squareness of cross slides or
machining axes on lathes and multi-
turn machines. With an added
magnetic leveling base accessory, the
L-702SP can also be used to check
machine leveling, alignment and axis
squareness.
System Features
•Fast: Easy setups let you do a quick alignment check in 20 minutes and get full alignment data in 30-40 minutes
on most machines.
•Easy: Laser and target mount directly into the spindle and tailstock, respectively, allowing the entire length of
even the largest lathes to be quickly and easily aligned without changing setups, replacing cumbersome and
impractical alignment test bars. With built-in squareness capability, checking cross-slide squareness is a 5-
minute operation
•Accurate: Ultra-high resolution of up to .00001 in. (0.00025 mm) combined with software to correct mounting
errors produces a very accurate alignment, less than .0001 in. (0.0025 mm) and .0001 in/ft (0.0083 mm/m) under
good environmental conditions.
•Lathe9 Software: Large, easy-to-read alignment displays, live alignment data and spindle graphics, and a six-
step procedure that guides users through the alignment with on-screen help instructions.
•Spindle8 Software: Designed for transfer-line spindle alignments, Spindle8 features large, easy-to-read
alignment displays, live alignment data and spindle graphics, and a four-step procedure that guides users through
aligning spindles to master parts on transfer-line spindle applications

2
Hardware Overview
Model L-702/L-702SP Spindle Laser
The Model L-702/L-702SP Lasers have a low-power, Class II
visible-light laser designed to mount in the spindle of a machine
tool to project its axis of rotation during alignment. Vertical and
horizontal angular controls allow the user to fine-adjust the laser
angle to the spindle’s precise axis of rotation. The L-702 is
designed for applications where the distance between target and
laser is approximately 100 ft. (30 m).
In addition to the spindle laser, the L-702SP version features an
automatically rotating turret that sweeps a laser scan plane
perpendicular to the laser beam for checking cross-slide/turret axis
squareness and multi-turn milling axes.
Built-in levels on the sides provide easy indexing when inverting
for error correction readings. A 0.50 in. (12.7 mm) mounting stud
simplifies fixturing and can be removed to adapt the unit to custom
fixtures or other alignment applications.
Both lasers feature a built-in, rechargeable, lithium ion battery that
provides operation for up to eight hours on a single charge.
The L-702 and L-702SP work with any Hamar Laser target,
readout, or interface. They can be used for many types of
alignment jobs, including spindle and bore alignment, and
measuring and correcting the alignment of a workpiece on the
machine.
Applications include:
•Horizontal Boring Mill Indexing Checks for Deep-Bore
Applications
•Lathe/Turning applications (cylindrical, OD/ID grinders, lathes)
•Multi-Turn Machining Centers
•Twin-Barrel Extruders
Figure 1– L-702 Spindle Laser
Figure 2 – L-702SP Spindle Laser and Scan Plane

3
Laser Control Panel and Functions
The Status LEDs
•Status LED – red – indicates the laser is powered on.
•Low Battery LED – red - blinks if the battery is low and needs charging.
•Charging LED – yellow – lights when the rechargeable battery is charging (see
Figure 3).
The On/Off Button
Press the ON/OFF button once to turn it on and press and hold to turn it off. The
I/O LED will illuminate when the power turns on.
L-702SP Scan button
Power the L-702SP on and press the SCAN button to turn on the turret laser rotation
and create a scan plane. Press it again to turn it off.
Note:The Pentaprism in the turret will need to be pivoted into place to create the
scan plane. See Switching L-702SP Turret into Scan Mode on Page 19 for
instructions.
A/C Connector
The L-702 comes with a rechargeable battery. The connector is shown below.
Pitch/Roll Adjustment Knob
The adjustment knobs use differential micrometers, allowing both coarse and fine functions.
•Coarse Adjustment – tighten the set screw to disable the fine adjustment.
•Fine Adjustment – loosen the set screw to enable the fine adjustment,
which is 12 times finer adjustment resolution.
Figure 4– Differential Micrometer
Figure 3– L-702/L-702SP Control Panel

4
L-702/L-702SP Laser Dimensions

5
The T-261A Four-Axis Target
The T-261 Four-Axis Target reads both center and angle (pitch and yaw)
simultaneously, allowing a real-time display of misalignment. The target
data has a resolution with the R-358 of .00001 in/ft. (0.0008 mm/m) in
angle mode and .00001 in. (0.0005) in in centering mode. Two bubble
levels on the top and bottom make it easy to position when inverting for
NORMIN procedure (see Appendix A, beginning on Page 26 ).
When the target is purchased as part of a system, it is calibrated at the
factory before shipping. If the target is purchased separately, then the
user must calibrate it, or enter the HLI-supplied calibration factors into
Lathe 9, before use. An alignment\calibration fixture and a target stand,
available from Hamar Laser, are required for calibration. The procedure
is outlined in Appendix C, beginning on Page 31.
Figure 6—T-261 Four-Axis Target
The R-358 Computerized Interface
The R-358 Computer Interface provides high accuracy (resolution is .00001 in. or 0.0005 mm) for downloading live target
data into a computer. It attaches to the computer with a cable and is powered by a lithium ion battery for up to 8 hours of
life. The battery automatically turns on when the target starts taking measurements and turns off when the program is
closed down. An AC adapter/charger is provided, and the unit features "charging" and "power" LED indicators.
Hamar Laser’s Lathe9 Alignment Software
Hamar Laser provides alignment software as standalone
programs. The latest software is Lathe9. For aligning transfer-
line spindles, we offer Spindle8 Software.
Lathe9 offers a user-guided, six-step process to check the
alignment of lathes, turning centers, multi-turn machines and
spindles in other machines.
Figure 5 – T-261A Four-Axis Target
Figure 7– Lathe9, Step 6 – Tailstock/Turret Alignment

6
Interpreting the Plus and Minus Signs in the Live Displays
The signs of the data displays indicate the position
(high/low or left/right) of the target is relative to
the laser beam. See the interpretation below.
Note the T-261 provide 4 simultaneous axes:
•Vertical Center
•Horizontal Center
•Vertical Angle
•Horizontal Angle
Vertical Axis
A +V center
value indicates the target is higher
than the laser beam.
A +V angular value indicates the back of the target
is higher than the front of the target.
A –V center value indicates the target is lower than
the laser beam.
A-V angular value indicates the back of the target
is lower than the front of the target.
Horizontal Axis
A +H center value indicates the target is to the
right of the laser beam.
A +H angular value indicates the back of the target
is to the right of the front of the target.
A –H center value indicates the target is to the left
of the laser beam.
A -H angular value means the back of the target is
to the left of the front of the target.

7
Preparing for an Alignment
There are several preparations that need to be made before beginning a measurement or alignment process. Ensure that
accurate records are kept for all procedures.
Lathe9 is designed to measure and align the spindle axis of rotation (AOR) to the tailstock, saddle or turret guideways. It
is also used to check the four-axis alignment of the tailstock or subspindle to the headstock AOR. The software fully
compensates for mounting errors of both the laser and target with extremely accurate results.
In lathe alignment, the L-702/L-702SP is mounted in the headstock spindle and aligned to the AOR. The T-261 Target is
then mounted in the tailstock chuck or in a fixture on the saddle, and then the straightness and flatness of the guideways is
measured relative to the L-702/L-702SP laser. The least-squares, best-fit algorithm is used to calculate the slope of the
“best-fit” line for the straightness data. This slope is a measure of the headstock alignment to the lathe guideways.
If the headstock rotation axis (AOR) is parallel (aligned) to the guideways, only then can the tailstock center or a
subspindle AOR be checked for alignment to the headstock AOR. The T-261 offers a live four-axis display of the
tailstock, subspindle or turret centers or AOR relative to the laser beam (headstock AOR).
Hardware Mounting
Both the L-702/L-702SP Laser and T-261 Target have a standardized .4995 in. (12.69
mm) mounting stud that simplifies fixturing and that can be removed to adapt the unit to
custom fixtures or other alignment applications. A .500 in. reamed hole that is square to a
face is all that is required to mount the laser/target mounting stud. The mounting stud also
has a ¼-20 threaded hole in the end of it.
Typically, the laser is mounted in the headstock chuck or collet. For large lathes, this may
involve creating a fixture to hold the laser in place. The T-261 is mounted in the tailstock
chuck, subspindle chuck or the turret center.
Maintenance and Cleaning
The spindle to be aligned should be checked thoroughly to ensure that it is clean and working properly. The window on
the T-261 should be clean and free from dirt, thumbprints and other smudges. The same applies to the L-702SP
pentaprism.
Tools and Equipment
Determine all the necessary tools and equipment (other than what Hamar Laser supplies) that will be needed for
performing an alignment, such as torque wrenches, shims, and equipment manuals.
Other Considerations
•Measure the travel distance of the tailstock, subspindle or turret. This information is necessary for the software setup.
Use only the distance that the unit realistically travels during use, not the full distance of which it is capable.
•Keep records of all procedures. Log all data file names and keep record copies of all reports and printed data.
Figure 8—L-702 Mounting Stud