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Huntron Access Prober User Manual

Automated probing station
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Copyright
2005 Huntron, Inc. All rights reserved.
Huntron, Tracker, ProTrack, Sig Assist and Huntron Access are registered trademarks of Huntron,
Inc. All other names are trademarks or registered trademarks of their respective companies.
This document may not be copied in whole or in part, or otherwise reproduced except as specifically
permitted under U.S. copyright law, without the prior written consent of Huntron, Inc.,
15720 Main Street, Suite#100, Mill Creek, WA, 98012, USA.
Huntron Access
Automated Probing Station
USER'S MANUAL
P/N 21-1328
Rev. 9, Feb 2007

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  • Page 1 Copyright 2005 Huntron, Inc. All rights reserved. Huntron, Tracker, ProTrack, Sig Assist and Huntron Access are registered trademarks of Huntron, Inc. All other names are trademarks or registered trademarks of their respective companies. This document may not be copied in whole or in part, or otherwise reproduced except as specifically permitted under U.S.
  • Page 2 User’s Manual...
  • Page 3 Thank you for purchasing a Huntron Access ! Contacting Huntron To obtain information about service, accessories and other products, contact: Huntron Inc. 15720 Main Street, Suite#100 Mill Creek, WA 98012 In North America, call 800-426-9265 or 425-743-3171. Huntron is also accessible by: ♦...
  • Page 4 Huntron software, shall not exceed the amount of the purchase price of the Huntron Access Prober, regardless of the extent of any such damage, including any special, consequential, or incidental damages of any kind.

  • Page 5: Table Of Contents

    TABLE OF CONTENTS Section 1 INTRODUCTION WHAT IS A HUNTRON ACCESS PROBER? ..........1-1 HOW DOES IT WORK?..................1-1 HARDWARE FEATURES ................1-2 SPECIFICATIONS ...................1-4 SAFETY INFORMATION................1-5 WEEE AND ROHS STATUS ................1-7 Section 2 THEORY OF OPERATION INTRODUCTION.....................2-1 2-2. STEPPER MOTOR CONTROLLER ...............2-2 STEPPER MOTOR DRIVERS ................2-2...
  • Page 6 INSTALLING THE PCI DRIVERS FOR THE COLOR CAMERA ....4-7 HUNTRON WORKSTATION SOFTWARE TUTORIAL ......4-7 4-10 INSTALLING THE ACCESS PROBER USING HUNTRON WORKSTATION 4.X SOFTWARE WITH TRACKERPXI ......4-9 Section 5 GENERAL HARDWARE MAINTENANCE RAIL LUBRICATION..................5-1 CALIBRATION REQUIREMENTS ..............5-1 SPRING CONTACT TEST PROBES..............5-2 REPLACING THE PROBE................5-2...

  • Page 7: What Is A Huntron Access Prober

    INTRODUCTION What is a Huntron Access Prober? A Huntron Access Prober is a universal test fixture for accessing test points on printed circuit assemblies. The Huntron Access provides physical access to fine pitched Printed Circuit Assemblies (PCAs). When combined with any test instrument like a Digitizing...

  • Page 8: Hardware Features

    HARDWARE FEATURES A complete troubleshooting workstation consists of a PC, Huntron Access Prober and a Test Instrument. The Test Instrument is a Huntron Protrack or a customer defined instrument having LabVIEW drivers allowing integration. New Hardware Features of the Huntron Access Prober •...
  • Page 9 Software applications for the Huntron Access Prober • Can be used with the Huntron workstation software and a Huntron Protrack model 20 for power-off troubleshooting of Printed Circuit Assemblies. • LabVIEW drivers allow control of the machine.

  • Page 10: Specifications

    1-4 Huntron Access Prober Specifications. Access Prober Comments P/N 99-0376-30 Specification Physical Dimensions 26.5” W, 24.5” D, 13” H 67.31 cm W, 62.3 cm D, 33.02 cm H Max. board-under-test size 19.4” W by 14” D Max thickness is 100 mils (2.54mm) (49.276 cm W by 35.56 cm D)

  • Page 11: Safety Information

    SAFETY INFORMATION Symbols and Warnings: !" # $% & The Access Prober conforms to the following European Directives: Low Voltage Directive 73/23/EEC Low Voltage Directive 93/68/EEC EMC Directive 89/336/EEC Meets ETL Standard for Electrical Equipment for Laboratory Use: Part 1:...
  • Page 12 Make sure that replacement fuses are of the type and current rating specified. If necessary, insert the specified fuse (T250mA or T500mA according to IEC 127) that matches the line voltage setting into the fuse tray. + ' $ ', # + ' $ ', # + ' $ ', # + ' $ ', #...

  • Page 13: Weee And Rohs Status

    Huntron products, being electronic test equipment, are classified as monitoring and control instruments and are presently exempt from the RoHS directives. Huntron is currently using leaded solder in the construction of our products but we are working for total compliance to RoHS to be completed by July 2006.

  • Page 14: Theory Of Operation

    SECTION 2 THEORY OF OPERATION INTRODUCTION The purpose of this section is to simply explain the functional characteristics of the main components of the Prober system. FUNCTIONAL OVERVIEW The following figure shows the components of the Prober system. The Test probe on the Z axis is directly connected to the BNC Signal connector located at the Prober back or side panel.

  • Page 15: Stepper Motor Controller

    STEPPER MOTOR CONTROLLER The Stepper Motor Controller receives ASCII commands from the PC via a serial RS232 connection. The controller applies direction pulses for clockwise or counter-clockwise rotation and step pulses at different frequencies to the motor driver. STEPPER MOTOR DRIVERS The purpose of the Motor Drivers is to supply sufficient and regulated current to each phase of the motor winding.

  • Page 16: Linear Encoder

    2-5 LINEAR ENCODER Linear encoders are used to report to the system the exact location of the Z axis housing which holds the test probe. Optical readers mounted in each axis reads the engraved lines on a metal tape. These lines are spaced 10 microns or 0.3937 mils apart. The optical reader automatically outputs quadrature signals to the controller, thus reporting its position after every movement.

  • Page 17: Vision System

    VISION SYSTEM The vision systems consist of a high-resolution color analog camera mounted on the Z- axis. The color camera is capable of 480 lines of horizontal resolution in the NTSC (rs- 170) format. It has automatic background compensation, which allows for digital brightness control on low or highlighting conditions.

  • Page 18: Installation: Access Prober Using Huntron Sdk Application

    • VGA color monitor. • 512 MB RAM. • 1 Free Serial (RS232) port for communicating with the Access Prober. • Hard disk with 1GB free space. • 1 free full height PCI slot or Compact PCI/PXI slot for the Camera Frame Grabber...

  • Page 19: Installing The Hardware

    3-2 Installing the Hardware 1. Open the Prober box, top side up and locate the unpacking sheet. 2. Follow the unpacking steps as outlined in the unpacking sheet. Lift the unit by grabbing the base only. Do not lift the unit by grabbing the sheet metal covers or the X axis mechanism.
  • Page 20 5. Remove the Z locking pin located near the probe tip. Do not discard this pin. You will need this pin for locking the Z probe assembly when transporting the unit. CAUTION: Remove Z Lock Pin before powering up this unit. Note: To reinstall the Locking Pin for repacking, push the Z probe all the way up first, then install the pin into the hole as shown above.

  • Page 21: Installing Ni-Imaq For Windows

    6. Check the Voltage Select/Line Fuse tray. The power entry module on all Probers includes the power switch (0 = OFF, 1 = ON), power cord connector, and a removable tray which selects the line voltage and holds the line fuses. POWER ENTRY MODULE FUSE, T500mA 250V FUSE, T250mA 250V...
  • Page 22 3-5 Connecting the Access Prober Camera to the National Instruments Frame Grabber card. A co-axial cable is supplied with the Huntron Access Prober. The National Instruments card has two formats, PCI and PXI. Connect one end of the supplied co-axial cable to the top BNC connector as shown below.

  • Page 23: Connecting The Prober Serial Interface To The Computer

    If your computer does not have a mouse port, you will need two serial ports, one for the Huntron Access Prober and the other for a serial mouse or trackball. If you have another type of port (USB) for the mouse, then you will need only 1 serial port for the Huntron Access Prober.

  • Page 24: Testing The System Using The Huntron Sdk Application Program

    Test points could be nodes, vias, IC pins, or component pads. Sample test board. For illustration purposes only. Insert sample test board into Top slot of Access Prober. Use board clamps as shown in example below. User’s Manual...
  • Page 25 User’s Manual...
  • Page 26 The installation of the LabVIEW software will create a desktop Icon Huntron Access SDK. Double click on the icon to start the software. The following screen will appear. • Check the hardware configuration. If your Access Prober is connected to COM2, change it by clicking on the dropdown arrow next to Serial Port, and select COM2.
  • Page 27 • The Camera Offset routine is necessary for setting up the distance between the camera center and the probe tip. You will need to identify a small via or dot pattern on your board for a target image. You move the camera over the target image and place the probe tip on top of the target by using the movement keys that moves the probe up, down, left, right, back and forward.
  • Page 28 • Click the button. You will need to place the probe on the center of your target. • switch. The system will switch to Probe mode. The Click the probe will not move until you click the Z movement keys. First set Z distance to 1000 uM (0.0397 inches).
  • Page 29 • Setup the Alignment images. Click the Alignment tab. • Select two alignment points on your sample board. Use Alignment images that have high contrast. See example above. Choose the second alignment point that is far apart as possible in a diagonal direction away from the first alignment point. Any image on your sample board can be used.
  • Page 30 • Check your points by clicking on the up or down arrow and click . Check that the camera returns to the center of the alignment image every time. • Now check the alignment by clicking . The camera will automatically align with the first image and then the second.
  • Page 31 Oscilloscope was configured into the PXI system, automatic measurements can be performed while the probe is in the down position. You will need to use LabVIEW to configure the test instrument and specify what measurements are to be recorded. This sample application uses a Multimeter and Oscilloscope card from National instruments for displaying the scope waveform and Multimeter measurement.
  • Page 32 • Save your data. Click and pick a folder path and filename to save the data. • Now exit the Huntron Access application. Click the X in the top right hand application Window. Now start the system again to check your work.

  • Page 33: Installation: Access Prober Using Huntron Workstation 4.X Software With Protrack Model

    ProTrack model 20. PC Requirements The following requirements are provided to assist you in purchasing the correct computer system to use with the Huntron Workstation software. These are the recommended minimum computer requirements: • PC with Pentium III or equivalent CPU.

  • Page 34: Installing The Huntron Workstation Software

    Workstation item. If no menu is displayed, run the Huntron Workstation.exe program located in the Setup folder on the CD. A Huntron License Agreement form is displayed. If you agree, select the “I accept the license agreement” option. Click Next. The readme.txt file on the CD will be displayed.

  • Page 35: Installing The Hardware

    3. Place the Prober on a stable table or desk. The ProTrack should be positioned on the left side of the Access Prober. Place the computer monitor on either side of the Prober. 4. Remove the Red Shipping Stoppers using the Hex Allen tool supplied in the tool kit.

  • Page 36: Installing The Pci Frame Grabber Card

    4-4 Installing the PCI Frame Grabber card INSTALL CAMERA FRAME GRABBER BOARD ONLY IN UL LISTED, CSA CERTIFIED, OR TUV/VDE LICENSED PERSONAL COMPUTERS WITH ENCLOSED POWER SUPPLIES WITH SELV NON-ENERGY HAZARDOUS OUTPUTS AND USER INSTRUCTIONS DETAILING THE INSTALLATION OF CARD CAGE ACCESSORIES. With the computer power turned off, install the card into the computer by positioning it over the PCI slot and pressing it firmly downward.

  • Page 37: Connecting The Protrack To The Prober

    4-6 Connecting the Camera Frame Grabber card to the Prober A co-axial cable is supplied with the Access Prober. The PCI camera card has four BNC connectors allowing up to 4 cameras to be connected. Connect one end of the co-axial cable to the top BNC connector as shown.

  • Page 38: Connecting The Prober Serial Interface To The Computer

    PARALLEL IEEE CABLE PRINTER PARALLEL PORT PARALLEL PRINTER CABLE CAMERA SECONDARY PARALLEL PORT CAMERA INTERFACE CABLE PROTRACK SERIAL CABLE PROBE COMPUTER CAMER SIGNA CHANNEL A COMMON COMMON SERIA Cable hookup for computer, Protrack with parallel port and Access Prober User’s Manual...

  • Page 39: Installing The Pci Drivers For The Color Camera

    4-8 Installing the PCI drivers for the Color Camera For Windows 2000/XP 1) Ensure that Huntron Workstation 4.x CD in your CD drive. If you have installed the Huntron Workstation Software (Section 4-2) and then installed the PCI Frame Grabber card (Section 4-4), you are now ready to install the drivers.

  • Page 40: Huntron Workstation Software Tutorial

    The Huntron Workstation Activation dialog is displayed. This software is only licensed to be used on one Protrack and Scanner and/or one Access Prober. The activation codes are generated by Huntron and are specific to the Protrack and Access hardware serial numbers.

  • Page 41: Installing The Access Prober Using Huntron

    PC Requirements The following requirements are provided to assist you in purchasing the correct computer system to use with the Huntron Workstation software and the TrackerPXI. These are the recommended minimum computer requirements: • PXI or CompactPCI chassis with Pentium III or equivalent CPU.
  • Page 42 Workstation item. If no menu is displayed, run the Huntron Workstation.exe program located in the Setup folder on the CD. A Huntron License Agreement form is displayed. If you agree, select the “I accept the license agreement” option. Click Next. The readme.txt file on the CD will be displayed.
  • Page 43 Slide the TrackerPXI card in the selected slot. Caution: Do not force the card into the slot. The card should slide in easily and come to a stop when the card connector is about to make contact with the chassis. Hold the card injector/ejector handle and pull it upward to lock it in place.
  • Page 44 Card is correctly inserted. Tighten these 2 screws. Tracker PXI card fully inserted and locked into position. Warning! Please ensure that all cables connected to the TrackerPXI card are no longer than 3 meters. 11. Locate the unpacking sheet that was supplied with the Prober. 12.
  • Page 45 14. Remove the Red Shipping Stoppers using the supplied Hex Allen tool. Do not discard these blocks. You will need them again if you transport the Prober to another location. 15. Remove the Z locking pin located near the probe tip. Do not discard this pin. You will need this pin for locking the Z probe assembly when transporting the unit.
  • Page 46 16. Check the Voltage Select/Line Fuse tray. The power entry module on all Probers includes the power switch (0 = OFF, 1 = ON), power cord connector, and a removable tray which selects the line voltage and holds the line fuses. POWER ENTRY MODULE FUSE, T500mA 250V FUSE, T250mA 250V...
  • Page 47 The activation codes are printed on the software CD. The activation codes can be e-mailed to you. If you do not know the activation codes, call Huntron technical support (425-743 3171) and provide the serial numbers for the TrackerPXI and the Prober . TrackerPXI serial numbers start with a RV.
  • Page 48 If you get a “successful verification”, click Close to exit the Diagnostic window. If you get a “Verification Failed” message, Re-run the Calibration routine and run the Verify Calibration again. If it still fails, call Huntron Technical support. 25 . Follow the software tutorial.

  • Page 49: General Hardware Maintenance

    The camera image should show that those test points are consistently and accurately accessed. The cross-hair on the camera image should be accurately positioned over the center of every test point previously set up. If the unit is out of calibration, please call Huntron Technical Support for further instructions. User’s Manual...

  • Page 50: Spring Contact Test Probes

    5-3 SPRING CONTACT TEST PROBES The Prober uses a spring loaded probe for making contact with a test point. Various probe styles are available depending on the type of components tested. These probes are commonly used in bed-of-nails fixtures and are readily available from a large number of manufacturers.

  • Page 51: Replacing Broken Probe Tips

    5-5 REPLACING BROKEN PROBE TIPS It is not necessary to disassemble any parts for this operation. The probe tip may break off from the probe holder in such a way that you are unable to remove the entire part with needle nose pliers.

  • Page 52: Probe Styles

    = 18 mils) Best pointing accuracy of any probe. IDI part number: ICT-100-UR-5.5 or (ICT-S25UR-5.5DGD-S) (Huntron P/N 07-2112) TIP SPEAR PROBE Used for testing contaminated boards or conformal coatings. Fine pitch devices can also be tested with this probe.
  • Page 53 Extended length for densely packed components. IDI part number ICTL100-M-5.7-G-S (or SR25B-6.3D) (Huntron P/N 07-2106) TRI-NEEDLE PROBE Used to test contaminated boards or pierce conformal coatings. Best for 100 mils or wider spaced leads or pads. IDI part number: S100-TN-6.7EN (or 25TN-6.7EN)

  • Page 54: Specifications For The Probe Receptacle

    5-7 SPECIFICATIONS FOR THE PROBE RECEPTACLE The general specifications for the probe receptacle, which is press fitted into the Prober probe holder, are as follows: The IDI part number of this receptacle is R-25-SC or RX-100-SC (Huntron P/N 07-2109). Receptacle Size: Connection Style:...

  • Page 55: Optional) Using The Burn-In Offset Board To Check For Proper Hardware Functions (For Use With Protrack Model 20 Only)

    CHECK FOR PROPER HARDWARE FUNCTIONS. (For use with Protrack model 20 only) This optional board (p/n 06-3078 not shipped with the Access Prober) can be used for checking the operation of your Prober. Run the Camera Offset routine on this board.
  • Page 56 5-10 Focus and aperture adjustments The camera lens on the color camera has a separate focus and aperture adjustment ring. These adjustment rings can be locked via a locking screw. The aperture setting is factory set and will be in the locked position. The setting is shown below. If the camera image appears dark even with maximum light intensity, it may be necessary to adjust the aperture.

  • Page 57: Prober Test Board Support Accessories

    Prober. These accessories are used in various combinations to hold different types of boards in the Prober. The description of each accessory includes an illustration and some examples of typical uses. Huntron part numbers are shown at the end of this section. 6-1 BOARD SPACER Board Spacer p/n 98-0111 Board Spacers move the test board away from the slotted walls.

  • Page 58: Crossbar

    6-2 CROSSBAR The Crossbar is normally used to hold the front side of the test board. (1 Crossbar is included in the Prober package) Cross Bar w/locks p/n 98-0393 6-3 SLIDE BAR User’s Manual...

  • Page 59: Slide Bar Extension

    The Slide Bar mounted on a Crossbar holds the left front corner of the Printed Circuit Assembly. The front of a Slide Bar on a Crossbar can hold the test board away from the Crossbar to allow components on the front edge of the board to be reached by the probe tip.

  • Page 60: Extended Slide Bar

    6-5 EXTENDED SLIDE BAR A Crossbar in the middle slot underneath the test board with an Extended Slide Bar can give support to the unsupported side of the test board. Also, a Crossbar in the middle slot is the main support for holding test boards in the top slot that protrude from the front of the Prober.
  • Page 61 When using Extended Slide Bars, the board must be mounted in the top slot of the Prober. The Crossbars (which hold the Slide Bar Extensions and Extended Slide Bars) are then mounted in the middle slot. This figure shows how to mount either an irregularly shaped board or a long and narrow board.

  • Page 62: Auxiliary Probe Accessory Kit

    Huntron Access Prober. Introduction A Huntron Access Prober has a spring loaded test probe attached to the Z axis. This probe is directly connected to a flexible coaxial cable which is terminated with a BNC connector at the Prober back panel. An oscilloscope can be directly connected to the BNC connector allowing test signals to be displayed on the oscilloscope CRT.
  • Page 63 Description Huntron P/N 1 Auxiliary Probe Holder 01-1239 1 Coaxial Cable Assembly, F/M 06-4147 1 BNC Adapter 07-1338 2 Screws, 4-40 x 1/2” Philips PH w/washer 07-3085 2 Cable Ties, black, 4” 07-3094 1 Thumb Screw Knob 07-3108 1 Spiral Wrap, 1/2” OD 07-3153 1 Cable Clamp, 1”...
  • Page 64 Installation of the Auxiliary Probe kit. (Refer to Figure 1) 1. Install the Auxiliary Probe Holder using the 2 supplied screws. 2. Insert your oscilloscope probe (not supplied with this kit) into the clamp hole of the Auxiliary Probe Holder and tighten the Thumb Screw Knob. The oscilloscope probe should now be firmly attached to the Prober Z axis.
  • Page 65 Please use these Huntron part numbers for ordering additional accessories. Huntron Access Board Spacer 98-0111 Cross Bar w/Locks 98-0393 Slide Bar 98-0109 Slide Bar Extension 98-0132 Extended Slide Bar 98-0133 Auxiliary Probe 98-0266 Accessory Kit User’s Manual...

  • Page 66: Application Notes

    Common references. The main common terminal Common on the Huntron Access Huntron Access Prober front panel is directly connected to the common BNC jack on the Huntron Access Prober side or back panel. NOTE: Even though 4 Commons are available for physical connection to the printed circuit assembly, only a combination of any 2 of those 4 Commons will get shorted to the main Common terminal.

  • Page 67: Using The Common Clip Cable With The Ferrite Noise

    Z axis up/down travel. These boards have to be probed on the solder side. However, the component may be in the way when you try to clamp the board into the slot. The Huntron Access Prober has an additional cutout in the base plate. This allows for additional clearance for the large components.
  • Page 68 End of document. User’s Manual...

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99-0376-30

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