DROP TESTER. PWB Level Drop Tester. Salon Teknopaja Oy (Ltd) Joensuunkatu SALO FINLAND

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Colin Henderson
6 years ago
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1 Salon Teknopaja Oy (Ltd) Joensuunkatu SALO FINLAND 1

COMPANY INFO Salon Teknopaja Oy is located in Salo, Finland.

They are equipped with special measurement devices and softwares which are driven

Most customers are electronic industry companies over the world.

2 COMPANY INFO Salon Teknopaja Oy is located in Salo, Finland. It design, manufacture and set up tester devices. Main product is. 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

3 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 Specifications 3

4 Specifications Noise level in use range ~ 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

5 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

Using the Drop Tester Calibration of the drop tester Before the test cycles, the tester is calibrated to meet the requirements of chosen test method.

6 Using the 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 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 Drop tester Windows PC ED-PC cable (RJ45) PC Oscilloscope Oscilloscope ED cable (USB) Event Detector (ED) Device coupler 6

7 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

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.

8 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

9 Calibration and testing AAC SW user interface 9

10 Calibration and testing During calibration tester controlled using the touch screen Example of PC oscilloscope display Acceleration sensor 10

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

11 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

12 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

13 Calibration and testing The PWB in jig Data processing SW Presenting calibration results 13

14 Calibration and testing Catcher The drop tester includes catcher to eliminate rebounds Magnet For catching 14

15 Drop tester example videos Video 1 Video 2 15

General info Event Detector Will be used customer product test After parameter input testing automatically untill results reached Instrument is developed for detect

16 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 16

Event Detector User Interface TEST SUMMARY : Test Cycles Executed : 11 Break count is shown with numbers and changing colours The user can choose what will be diplayed in the bottom line Clicking

Longest Failure Num Num Breaks Break Break Contin. Rate Breaks Break Break Contin. Rate 1 1 0 0 0 0 0.00 0 0 0 0 0.00 1 2 0 0 0 0 0.00 0 0 0 0 0.00 1 3 0 0 0 0 0.00 0 0 0 0 0.00 1 4 0 0 0 0 0.

17 Event Detector User Interface TEST SUMMARY : Test Cycles Executed : 11 Break count is shown with numbers and changing colours The user can choose what will be diplayed in the bottom line Clicking channels break count window the user will get brief statistics display 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

18 Event Detector How does it work 18

19 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. 19

20 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

21 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

22 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

23 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

24 Drop tester service and maintenance Maintenance tasks Every time when the tester is used 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 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. 24

25 Drop tester service and maintenance Maintenance tasks 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 25

26 THANK YOU FOR INTEREST! 26

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Top spin Nr / Top spin Nr. 1840 0000 / 1840 1000 Bedienungsanleitung 21-6680 28052014 / A Made in Germany Ideas for dental technology Top spin Nr. 1840 0000 / 1840 1000 Contents 1. Introduction...2 1.1 Symbols...2 2.