DROP TESTER PWB Level Drop Tester Salon Teknopaja Oy (Ltd) - PowerPoint PPT Presentation

DROP TESTER PWB Level Drop Tester Salon Teknopaja Oy (Ltd) Joensuunkatu 5 24100 SALO FINLAND www.teknopaja.com 1

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. 2

DROP TESTER PWB Level Drop Tester Specifications  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 3

DROP TESTER PWB Level Drop Tester Specifications  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 4

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 5

DROP TESTER PWB Level Drop Tester Using the Drop Tester Windows PC Drop tester  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 ED-PC cable (RJ45) using the acceleration sensor and PC oscilloscope. Oscilloscope is using acceleration sensor to measure the shock. PC Oscilloscope During the calibration normally three Oscilloscope – ED cable (USB) parameters are being observed: peak acceleration, pulse duration and pulse shape. Acceleration sensor cable Event Detector (ED) Device coupler 6

DROP TESTER PWB Level Drop Tester Using the Drop Tester  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 7

DROP TESTER PWB Level Drop Tester Calibration and testing  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 8

DROP TESTER PWB Level Drop Tester Calibration and testing AAC SW user interface 9

DROP TESTER PWB Level Drop Tester Calibration and testing During calibration tester controlled using the touch screen Example of PC oscilloscope display Acceleration sensor 10

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 11

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 .” 12

DROP TESTER PWB Level Drop Tester Calibration and testing The PWB in jig Data processing SW Presenting calibration results 13

DROP TESTER PWB Level Drop Tester Calibration and testing Catcher Magnet For The drop tester includes catching catcher to eliminate rebounds 14

DROP TESTER PWB Level Drop Tester Drop tester example videos Video 1 Video 2 15

DROP TESTER PWB Level Drop Tester Event Detector General info Windows PC Drop tester • Will be used customer product test • After parameter input testing automatically untill results reached • Instrument is developed for detect ED-PC cable (RJ45) electrical breaks • Shortest break >0,7 µs • Controlled via GPIB Ribbon cable • Operation system Windows 7 (32/64 bit) Event Detector 16 16

DROP TESTER PWB Level Drop Tester Event Detector User Interface TEST SUMMARY : Test Cycles Executed : 11 Shock Shock Shock Shock Shock Steady Steady Steady Steady Steady Card Chan Total First Last Longest Failure Total First Last Longest Failure Num Num Breaks Break Break Contin. Rate Breaks Break Break Contin. Rate Clicking channels Break cou nt is shown 1 1 0 0 0 0 0.00 0 0 0 0 0.00 break count window with nu mbers and 1 2 0 0 0 0 0.00 0 0 0 0 0.00 the user will get brief changing colou rs 1 3 0 0 0 0 0.00 0 0 0 0 0.00 statistics display 1 4 0 0 0 0 0.00 0 0 0 0 0.00 1 5 2 10 11 2 100.00 2 10 11 2 100.00 1 6 0 0 0 0 0.00 0 0 0 0 0.00 The user can choose 1 7 1 4 4 1 01.12.50 0 0 0 0 0.00 what will be diplayed 1 8 0 0 0 0 0.00 0 0 0 0 0.00 in the bottom line 1 9 0 0 0 0 0.00 0 0 0 0 0.00 1 10 1 2 2 1 01.10.00 0 0 0 0 0.00 1 11 7 5 11 7 100.00 7 5 11 7 100.00 17

DROP TESTER PWB Level Drop Tester Event Detector How does it work 18

DROP TESTER PWB Level Drop Tester Event Detector Operation EXAMPLE Meas current and threshold voltage are given in basic configuration. ● R dut=500 Ω I meas=1mA U thres=1V ● U thres / I meas = R thres 1.0V / 1.0mA = 1 kΩ ● If R dut is 500 Ω during testing  U in is 0.5V (1mA*0.5 kΩ). Because U thres(1V)> U in (0.5V) no break is detected. ● If R dut suddenly raises >1k Ω and because current is constant, U in > U thres. This will be interpreted as break. 19

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) 20

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). 21

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. 22

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) 23