Huvitz HLM-1 User manual

Auto Lensmeter HLM-1
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Service Manual
Auto Lensmeter HLM-1

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AUTO-LENSMETER
INDEX
1. INTRODUCTION......................................................................................................................... 4
1.1. COMPONENTS LIST ............................................................................................................................................4
1.2. REPAIR PROCEDURE............................................................................................................................................6
1.3. CAUTIONS ............................................................................................................................................................7
1.4. SOFTWARE VERSION...........................................................................................................................................7
1.5. OPTICAL SYSTEM ................................................................................................................................................7
1.6. MEASUREMENT PRINCIPLE................................................................................................................................8
2. CHECKING AND SETUP METHOD.......................................................................................... 9
2.1. SETUP ORDER......................................................................................................................................................9
2.2. HOW TO SET ORIGIN...................................................................................................................................... 10
2.3. HOW TO SET 12 STANDARD LENSES............................................................................................................ 11
2.4. HOW TO SET PRISM........................................................................................................................................ 12
2.5. THE CALIBRATION OF THE CYLINDRICAL AXIS.............................................................................................. 13
2.6. DIOPTER SETTING VARIABLES LIST................................................................................................................ 15
2.7. HOW TO CHANGE THE CCD CAMERA ......................................................................................................... 16
2.8. HOW TO CHANGE THE LED ASSEMBLY ....................................................................................................... 18
2.9. HOW TO CHANGE THE PINHOLE HOUSING ................................................................................................ 18
3. REPAIR STANDARD .................................................................................................................... 20
3.1. REMOVING COVER ASSEMBLY....................................................................................................................... 20
3.2. FRAME ASSEMBLELY ........................................................................................................................................ 22
3.3. BACK BONE ASSEMBLY................................................................................................................................... 24
3.3.1 PD BAR SUB-ASSEMBLY .......................................................................................................................... 26
3.3.2 FOOT FRAME SUB-ASSEMBLY.................................................................................................................. 28
3.3.3 PEN FRAME SUB-ASSEMBLY................................................................................................................... 30
3.3.4 PEN SLIDE SUB-ASSEMBLY ..................................................................................................................... 32
3.3.5 PD PINION SUB-ASSEMBLY..................................................................................................................... 34
3.3.6 LED BONE SUB-ASSEMBLY ..................................................................................................................... 36
3.4 LCD ASSEMBLY................................................................................................................................................ 38
3.5 UNDER COVER ASSEMBLY.............................................................................................................................. 40

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4. ELECTRICAL BLOCK DIAGRAM.............................................................................................. 42
4.1. ELECTRICAL BLOCK DIAGRAM......................................................................................................................... 42
4.2. INSPECTING SMPS.......................................................................................................................................... 44
4.3. LCD TEST ........................................................................................................................................................ 45
4.4. LED TEST......................................................................................................................................................... 45
5. HOW TO UPGRADE THE FIRMWARE SOFTEWARE........................................................... 42
5.1. INTRODUCTION ..............................................................................................................................................426
5.2. HOW TO UPGRADE THE FIRMWARE SOFTWARE USING DNW APPLICATION IN HLM MACHINE .....447

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AUTO-LENSMETER
1. Introduction
1.1. Components List
Figure 1. Components Names (I)
LCD Screen
MEM Button
(Save Button)
Marking Lever
Lens Table Lever
Lens Holder Lever
Lens Cap
Button
Lens Table

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Figure 2. Components Names (II)
Figure 3. Components Names (III)
Power Switch
Power Connector
RS-232 Connector

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AUTO-LENSMETER
1.2. Repair Procedure
Power ON
1. Examining the Internal
Components First
2. Inspecting The value,
S.C.A. Prism
Checking
Abnormal
State
Cleaning the
Pinhole
Power off and on
Checking
Abnormal
State
Setup Again
Exit
Normal
State
Normal
State
Figure 4. Repair procedure flow chart

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1.3. Cautions
Always protect this instrument with Dust Cover after using.
Do not vibrate or drop this instrument; it can cause damage.
Use soft cloth or cotton swaps with alcohol when clean the pinhole.
1.4. Software version
Software version will be shown on the screen if you turn on the power switch.
1.5. Optical System
Optical system resolves the features of the lens such as diopter and prism. It is composed
of light emitting part and signal receiving part: light emitting part composed of optic LED
and collimation lens, signal receiving part composed of hartman plate and 2-dimentional
CMOS sensor. The followings are the components of each part:
Light Emitting Part
- Optic LED : 525nm
- Ball Lens : condenses the light radiated from Optic LED.
- Rubber Ring : fix ball lens.
- Scatter : disperse the optic LED light
- Pinhole : 0.3mm diameter
- Collimation lens : makes parallel light.

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Signal Receiving Part
- Hartmann plate : divide the signal into 81 points. Prevent the other light except the
signal
- 2-dimentional CMOS sensor : converts signals into digital value.
1.6. Measurement Principle
Basic Principle
When there is no lens (0D state), parallel light that has transmitted the collimator lens
passes the pinhole and makes image on CCD. In case of convex lens (lens with plus
diopter), parallel light that has transmitted the collimator lens converges through the
measuring lens, passes the pinhole and then makes image on CCD. On the other hand, in
case of concave lens (lens with minus diopter), parallel light that has transmitted the
collimator lens diverges through the measuring lens and then passes the pinholes and at
last makes image on CCD.
2.
Initial State
Concave Lens
Convex Lens

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2. Checking and Setup Method
2.1. Setup Order
Start up with pressing 3 and 6 keys, then you can meet “Setup Mode” as below.
While this mode, ‘SETUP MODE’ mark will show in the upper area.
Calibration can be processed only in SETUP mode; LENS, PRISM, CYLINDER. To all
setting, you should convert the display step (STEP) into 0.01. In case of prism, convert the
prism display into P-B format. Display step (STEP) and prism display format can be
changed in ‘User Setup’ screen. Press the ‘USER’ (Key 4) button in the basic display
screen.

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2.2. How to Set Origin
The steps of setting origin are as follows:
A. Press the ‘LENS’ (Key 1) button.
B. Press the ‘MEASURE’ (Key 2) button.
C. Determine the lens to measure by using two ‘-INDEX’, ’+INDEX’ buttons.
D. ‘D-0.01’ button and ‘D+0.01’ button by the given value in the Standard Lens-set
specification.
E. To save and exit, press the ‘SAVE’ button.
F. Press the ‘EXIT’ button again. And check if the diopter that has been set up in the
basic display screen is shown.
‘SAVE SCREEN INFORMATION’ is as follows:
CEN: The x, y, coordinates of big center point.
LEN: Average distance between of four points.
CON: The x, y, coordinates of four big points.
DIP: Saving order and the saved diopter.
Buttons for Selecting
Diopter
Buttons for Calibrate
Diopter
SAVE button
Previous screen
button

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If you want to return to the previous one without saving in the SAVE screen, press the
rightmost ‘PREV’ button.
2.3. How to Set 12 standard lenses
If the measured value is not accurate, you should set the diopter variables again by using
the standard lens-set: for all the 12 lenses in the standard lens set. Always keep the
standard lens clean out of dust or stain.
A. Set the diopter display step into 0.01.
B. Place the standard lens and move it so that ‘Green Color Cross Line’ will appear.
C. Press the ‘LENS’ (Key 1) button.
D. Press the ‘MEASURE’ button.
E. Determine the lens to measure by using two ‘-INDEX’, ’+INDEX’ buttons.
F. ‘D-0.01’ button and ‘D+0.01’ button by the given value in the Standard Lens-set
specification.
G. To save and exit, press the ‘SAVE’ button.
H. Press the ‘EXIT’ button again. And check if the diopter that has been set up in the
basic display screen is shown. .
I. Repeat the procedures from step B to H for 12 standard lenses.
The information displayed in the ‘Setting Diopter’ screen is the same as that of ‘Setting
0D’ screen.

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2.4. How to Set Prism
If the measured value is not accurate, you should set the 2, 5, 10, 15, 20lens again
by using the standard lens-set.
A. First, convert prism display format into P-B.
B. Then, press the ‘PRISM’ (Key 2) button.
C. After selecting the 2lens from the standard lens set, place it on the lens cap.
D. ‘-0.01’ button and ‘+0.01’ button by the given value in the Standard Lens-set
specification.
E. Rotate it to become the center position of 0~30(A0) degree.
F. Press the ‘MEASURE’ button and check if ‘A0/A1/A2/A3/A4/A5/A6/A7/A8/A9/A10/
A11:’ value is changed.
G. Repeat from step E ~ F to the center position of 331 ~ 360(A11) degree.
H. Finally the ‘SAVE’ button to save.
I. Repeat the procedures from C to H for 5, 10, 15lens and 20lens.
‘Prism’ screen will show the following information:
-PRISM : 2 Prism, 5 Prism, 10 Prism, 15 Prism, 20 Prism
-Idx : Display prism index currently.
-ANGLE : Display axis index currently.

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ANGLE
PRISM BASE
0
0°~ 30°center
1
31°~ 60°center
2
61°~ 90°center
3
91°~ 120°center
4
121°~ 150°center
5
151°~ 180° center
6
181°~ 210°center
7
211°~ 240°center
8
241°~ 270°center
9
271°~ 300°center
10
301°~ 330°center
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331°~ 360°center
2.5. The calibration of the cylindrical axis
With the +5D rectangular cylindrical lens, we can calibrate the cylindrical axis of our
machine. The procedures are as followings:
A. Press the ‘CYL’ (Key 3) button.
B. Place the +5D rectangular cylindrical lens on the lens cap.

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C. ‘-0.01’ button and ‘+0.01’ button by the given value in the Standard Lens-set
specification.
D. Locate it to the center while cling it to the lens.
(Axis : 90°, Prism_x, y: 0)
E. Press the ‘MEASURE’ button and check if ‘A90’ value is changed.
F. Finally the ‘SAVE’ button to save.
- CYLINDER : 5Diopter cylinder lens.
- Idx : Display axis index currently.
- AXIS : Display axis base currently.

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2.6. Diopter Setting Variables List
The followings are diopter setting variables list:
If diopter controlling is performed normally, the length of each row (L) decreases row by
row.
WAVEFRONT DATA INFORMATION [ALL DIOPTER]
0 [-25.01]: L=+174.05; 123.48, 122.67: average distance and distance rates between
the four points and -25D
1 [-19.99]: L=+168.52; 119.09, 119.23: average distance and distance rates between
the four points and -20D
…
6 [+0.00]: L=+135.93; 96.11, 96.12 CX:642.71: average distance and distance rates
between the four points and 0D
7 [+2.50]: L=+131.04; 92.71, 92.62 CY:510.36: average distance and distance rates
between the four points and +2.5D
…
12 [+25.00]: L=+73.17; 51.82, 51.66: average distance and distance rates between
the four points and +25.00D

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2.7. How to change the CCD camera
The procedures for changing a camera are as followings.
A. Remove all subassemblies that are the side cover, the lens table and the lower
cover and the CCD cover etc.
B. Loose the Base Screw I and then take out the old CCD assembly.
C. Detach the protective seal from the new CCD.
D. Place the new CCD in its position. Lift it up as much as you can. But Be careful not
to collide with the bone metal.
E. Fasten the Base Screw I into Base Hole.
F. Loose CMOS Camera Screw I and CMOS Camera Screw II a little.
G. Turn on the machine as the setup mode and then press the ‘LENS’ (Key 1) button
for a while to go into the Calibration page.
H. Press the first ‘ALIGN’ button to check the CMOS Camera position continuously.

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I. We should place the CMOS Camera keeping two conditions: The first condition is
the position of center point. The center position is shown at the 5th row like this.
- CEN: (+640.00, +512.00)
It must be within ( +640.00 ± 15, 512 ± 15 )
The second one is the orientation of CMOS Camera. It should be parallel with that
of the base side plane. Keep the side plane of CMOS Camera parallel with the
plane of that of the Base metal as much as you can. While two conditions both are
all right, fasten two CMOS Camera Screws.
J. If the sum of two A12 values in 6th row is greater than | 0.1 |, loose all set screws
for the Pinhole Housing. And then rotate a little so that the sum of two A12 values
is less than | 0.1 |. On the contrary, if the sum of two A12 values is within | 0.1 |,
there is no need to do Step J and K.
K. And then fasten all set screws for the Pinhole Housing.
L. Cover the CMOS Camera cover and fasten it.
M. Assemble all subassembly again.
N. You must execute all procedures for the calibration that are described in from
section 2.2 to section 2.6.
When you loose the 5 socket set screws, be cautious not to crash the space of screws.
To do so, force it pushing and rotate so slowly.
Center
Point
A12:
Angle of two
point

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2.8. How to change the LED Assembly
The spare part for the LED assembly is the Upper Frame. So, we provide all upper
frame assembly for the LED assembly.
The procedures for changing the upper frame Assembly are as followings:
A. Remove the Side Cover, Front Upper Cover and Upper Frame.
B. Place the new Upper Frame and fasten it.
C. Assemble the Front Upper Cover and the Side Cover again.
D. You must execute all procedures for the calibration that are described in from the
section 2.2 to section 2.6.
2.9. How to change the Pinhole Housing
The procedures for changing the Pinhole Housing are as followings:
1. Take out the Lens Supporter.
2. Remove the Pinhole Housing Cover which is the below cover under the Lens Supporter.
This is stuck with soft glue. Therefore we need to lift up smoothly.

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3. Loose and take out the screws in Upper Holes.
4. Loose the Socket Set Screws.
5. Lift up the Pinhole Housing and replace it the new one.
6. Turn on the machine to the Setup Mode and then press ‘LENS’ (Key 1) button for a
while to go into the Calibration Display.
7. Press the first ‘ALIGN’ button to see the position information.
8. Rotate the Pinhole Housing a little to make the parallel level which is the sum of two
A12 less than |0.1|.
9. Fasten the 5 Socket Set Screws keeping the parallel level guaranteed.
10. Fasten all the screws in Upper Holes.
11. Place the Upper Cover of Pinhole Housing and stick it.
12. You must execute all procedures for the calibration that are described in from the
section 2.2 to section 2.6.