Drop Tester slides 2014_R01

DROP TESTER
PWB Level Drop Tester
Salon Teknopaja Oy (Ltd)
Joensuunkatu 5
24100 SALO
FINLAND
www.teknopaja.com
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DROP TESTER
PWB Level Drop Tester
COMPANY INFO
Salon Teknopaja Oy is located in Salo, Finland.
It design, manufacture and set up tester
devices.
Main product is PWB Level Drop Tester. They
are equipped with special measurement
devices and softwares which are driven by one
user interface. Most customers are electronic
industry companies over the world.
Salon Teknopaja Oy makes also different test
mechanics and jigs with test needle and probe
contacts, Free Fall Testers, Push and Pull Cycle
Tester for power supplies, Cable Bending
Tester etc.
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DROP TESTER
PWB Level Drop Tester
Specifications
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Drop Tester determines reliability of the PWC (Printed Wiring Board)
level against mechanical shock
Max drop height 1600 mm
Test control In calibration mode controlled by touch screen; in testing
mode controlled by Windows PC and the Event Detector software
Catcher which eliminates the rebound, also possible to switch off
Test method by Jedec standard and others. Tested with the following
values of acceleration peak (G)/ pulse duration (ms): 2900 G/ 0.3 ms,
2000 G/ 0.4 ms and 1500 G/ 0.5 ms)
Size of the standard test board Maximum 170 mm x 90 mm
Safety CE Compliant
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DROP TESTER
PWB Level Drop Tester
Specifications
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Noise level in use range ~ 50 – 90 dB, dependant on the absorber
material, measured the door open from 3 meter’s distance
Weigth of the table 4 kg
Maximum drop weight approx. 1,5 kg
Material of the table nickel coated aluminium
Shock stone Finnish granite, “Kurun harmaa” weight approx. 100 kg
Standard power inputs main power AC 240 V or AC 110 V; 50…60Hz;
ampere req. 6 A (10 A for 110V model); kW requirement 0,7 kW
Motor 0,18 kW with brake
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DROP TESTER
PWB Level Drop Tester
Specifications
• Wide=670 mm, Deep=570 mm,
Height=2500 mm
• Leave free space about half meter
every side of tester
• Table location right side
• Weight about 275 kg
• Note these things when design
layout, transport tester and install
tester
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DROP TESTER
PWB Level Drop Tester
Using the Drop Tester
Drop tester
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Windows PC
Calibration of the drop tester
Before the test cycles, the tester is
calibrated to meet the requirements of
chosen test method. The calibration is done
using the acceleration sensor and PC
oscilloscope. Oscilloscope is using
acceleration sensor to measure the shock.
During the calibration normally three
parameters are being observed: peak
acceleration, pulse duration and pulse
shape.
Acceleration sensor cable
ED-PC cable (RJ45)
PC Oscilloscope
Oscilloscope – ED
cable (USB)
Event Detector (ED)
Device coupler
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DROP TESTER
PWB Level Drop Tester
Using the Drop Tester
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Calibration of the drop tester
These can be monitored in the PC
oscilloscope user interface and the results
are also logged in a data file for further
analysis. The analysis is done using specific
data processing software delivered with the
drop tester and the PC oscilloscope (Drop
Converter Software).
The specifications for measured parameters
are dependant on the used testing method
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DROP TESTER
PWB Level Drop Tester
Calibration and testing
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Acceleration sensor fasten to jig, cables to
coupler and oscilloscope. Oscilloscope
connected to PC. Curve and other results
controlled with AAC SW on PC display.
G value adjusted with drop height.
Pulse width adjusted by changing strike pad
thickness and/or length and with different
strike plates
Calibration done when test result cpk value is
at least 1,33
After acceptable calibration test can be
started
Drop height value will be transferred to Event
Detector SW. Test is done with Event Detector
SW
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DROP TESTER
PWB Level Drop Tester
Calibration and testing
AAC SW user interface
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DROP TESTER
PWB Level Drop Tester
Calibration and testing
During calibration tester controlled
using the touch screen
Example of PC oscilloscope display
Acceleration
sensor
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DROP TESTER
PWB Level Drop Tester
Calibration and testing
Process capability index CPK
The process capability index, or Cpk, measures
a process's ability to create products or results
within specification limits.
Cpk represents the difference between the
actual process average and the closest
specification limit over the standard deviation,
times three.
CPK on-line
calculation
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DROP TESTER
PWB Level Drop Tester
Calibration and testing
Process capability index CPK
“If you hunt our shoot targets with bow, darts,
or gun try this analogy.
If your shots are falling in the same spot
forming a good group this is a high Cp, and
when the sighting is adjusted so this tight
group of shots is landing on
the bullseye, you now have a high Cpk.”
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DROP TESTER
PWB Level Drop Tester
Calibration and testing
The PWB in jig
Data processing SW
Presenting calibration
results
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DROP TESTER
PWB Level Drop Tester
Calibration and testing
Catcher
The drop tester includes
catcher to eliminate
rebounds
Magnet
For
catching
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DROP TESTER
PWB Level Drop Tester
Drop tester example videos
Video 1
Video 2
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DROP TESTER
PWB Level Drop Tester
General info
Event Detector
• Will be used customer product test
• After parameter input testing
automatically untill results reached
• Instrument is developed for detect
electrical breaks
• Shortest break >0,7 µs
• Controlled via GPIB
• Operation system Windows 7 (32/64 bit)
Drop tester
Windows PC
ED-PC cable (RJ45)
Ribbon cable
Event Detector
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DROP TESTER
PWB Level Drop Tester
Event Detector
User Interface
TEST SUMMARY :
Test Cycles Executed : 11
Clicking channels
Break count is shown
break count windo w
with numbers and
the user will get brief
changing colours
statis tics display
The user can choose
what will be diplayed
in the bottom line
Card
Num
Shock Shock Shock Shock Shock
Chan Total First Last Longest Failure
Num Breaks Break Break Contin. Rate
1
1
0
0
0
0 0.00
1
2
0
0
0
0 0.00
1
3
0
0
0
0 0.00
1
4
0
0
0
0 0.00
1
5
2
10 11
2 100.00
1
6
0
0
0
0 0.00
1
7
1
4
4
1 01.12.50
1
8
0
0
0
0 0.00
1
9
0
0
0
0 0.00
1 10
1
2
2
1 01.10.00
1 11
7
5 11
7 100.00
Steady Steady Steady Steady Steady
Total First Last Longest Failure
Breaks Break Break Contin. Rate
0
0
0
0 0.00
0
0
0
0 0.00
0
0
0
0 0.00
0
0
0
0 0.00
2
10
11
2 100.00
0
0
0
0 0.00
0
0
0
0 0.00
0
0
0
0 0.00
0
0
0
0 0.00
0
0
0
0 0.00
7
5
11
7 100.00
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DROP TESTER
PWB Level Drop Tester
Event Detector
How does it work
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DROP TESTER
PWB Level Drop Tester
Event Detector
Operation
EXAMPLE
Meas current and threshold voltage are
given in basic configuration.
● Rdut=500Ω
Imeas=1mA
Uthres=1V
● Uthres / Imeas = Rthres 1.0V / 1.0mA
= 1kΩ
● If Rdut is 500Ω during testing  Uin is
0.5V (1mA*0.5kΩ). Because
Uthres(1V)> Uin (0.5V)
no break is detected.
● If Rdut suddenly raises >1kΩ and
because current is constant, Uin > Uthres.
This will be interpreted as break.
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DROP TESTER
PWB Level Drop Tester
Event Detector
When test ends
• Choice channel amount used (e.g. 12)
• Specify how many breaks allowed for exact
amount of channels
• Choice e.g. channels 4-8 to monitoring.
Decide every channel allowed max 5
breaks
• Test ends when in every channel has at
least 5 breaks (some channels may have
more)
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DROP TESTER
PWB Level Drop Tester
Event Detector
FAQ
What is Clamp Voltage?
-The Clamp Voltage is kind of ”emergency stop” for voltage rise. It
limits specimen’s voltage to it’s value and stops testing.
What is optimal cable lenght?
-Optimal cable lenght is 2 meters. Over 2.5 metrer cable is not
recommended.
What is Event’s Duration sensitivity?
-Minium detectable break is 0,6 µs (HIGH). Other available
settings are 1.5 µs (MEDIUM) and 3 µs (LOW).
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DROP TESTER
PWB Level Drop Tester
Event Detector
FAQ
-Event Detector is not oscillosscope, sampling rate is 1/drop.
Hardware is ”armed” to detect breaks. If break occur during drop,
it will be stored to Event’s memory. After strike data will be stored
to log file and shown on user interface. Next Event measures
”steady state” to track broken cables. Then it is ready for another
drop.
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DROP TESTER
PWB Level Drop Tester
Drop tester service and maintenance
• Drop tester is to be maintained and repaired only by a professional
staff, which have read and understood the User and service guide
• The maintenance should be done periodically and all actions must
be recorded in a service diary. Use of a check list of actions is
recommended
• Every me before starting to operate the drop tester, check all the
functionality of the safety devices. Please also check that there are
no obstacles to harm the movement of the sledge or the carrier
• If you must temporarily remove any safety devices or shields, be sure
to place them back after maintenance or repair work
• Use only spare parts delivered or approved by the device
manufacturer (Salon Teknopaja)
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DROP TESTER
PWB Level Drop Tester
Drop tester service and maintenance
Maintenance tasks
• Every time when the tester is used
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check that the drop base is clean
clean the machine from the dust and excess stuff. Avoid touching slides when cleaning
perform visual inspection over the tester
• Monthly actions
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Check the tightness of the screws.
Check the tightness of the engine’s tooth belt.
Check the tightness of screws in the shaft coupling and the motor.
Check all the other parts and replace broken and old parts.
Clean the machine.
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DROP TESTER
PWB Level Drop Tester
Drop tester service and maintenance
Maintenance tasks
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Each 6 months you should:
 check the bearings and change if necessary
 check that the tester is in horizontal position and steady
 check the gap of the lift magnets
Each 12 months is recommended on-site maintenance by Salon Teknopaja Oy
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DROP TESTER
PWB Level Drop Tester
THANK YOU FOR INTEREST!
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