Usb Bt Joystick Center Gold Cracked Plates
Gaspard Xenos
So I got these two Ataris, just got them working. I was testing out the controllers and most of them have problems with the joystick not reacting. I opened them up, cleaned them, still have the problem. Than I pushed down on some of the contacts and realized they didn't have any tension. So can I bend them back or should I just suck it up and pay 25$ to buy 25 contacts off eBay?
If the problem is intermittent, You can also remove power from the Atari and spray plastic safe contact cleaner into the controller socket and system pins and then insert and remove several times to clean up those connections.
Next the board to cable connections should be re-flowed with new flux or remove and replace with some new flux and fresh solder to firm up those connections. Once you are sure of those connections you can check the discs by clipping an ohmmeter the board edge and testing the pads directly.
The disc works by connecting the outer loop to the center pad and IR remotes of later eras used interlocking contact fingers and a conductive pad to do the same trick. Over time both types suffer from oxidation on the exposed contact area preventing electrical contact across the switch. That hard nonconducting layer will build up on the surface and then get transferred to the other surface which is also going though the same process though at a different rate because to the different metal.
I'd consider the disc the issue if the symptom is constant activation. Although I guess if pressing the disc center causes the edge dimples to lift that could be a problem too. Lightly bending the disc will give a stronger response for a time. Try not to make a hard crease. They were pressed out of a mold to be formed but whatever you do don't flatten the any of the dimples. That would make contact area much less effective.
If your symptom is no response on one or two pads - they are not detecting and that is almost certainly oxidation. You can verify that is the problem with an ohmmeter on the pins at the edge of the board.
***Note: I have not looked at these forever and don't recall for sure the contact area trace material on the board. If its carbon then you don't want to use any mechanical cleaning methods just want to use some carbon safe electrical contact cleaner. Carbon contacts are almost impossible to fix without luck and far more practice than you have if you are asking this question.
Repair attempts vary, but it does not hurt to try if as the other poster mentioned there is a replacement PCB with gold contacts available. Cleaning is only going to solve the issue for a time. Eventually the contact area will oxidize again. How quickly depends on your environment.
To clean use light short strokes in one direction with a soft pink art eraser on both contact surfaces and the disc. Prior to reassembly clean with a zero-residue contact solvent to clean up any oils from handling before immediately reassembling. If the eraser is getting dirty you move to a clean surface on the eraser or trim it with a knife otherwise you are just pushing dirt back onto the board. If the eraser is crumbling you may be pressing too hard.
The eraser works by taking off the top oxide layer and if you rub too hard probably some of the base metal as well. Eventually after many cleaning cycles to you will remove enough metal to damage the trace. If you do this with gold plated contacts you can also abrade thought the plating negating its use.
We used to replace the domes with half razor blades (split in half along the long side).The blade can be attached in the center, below the metal ring, and right there you can put a little bit of paper to lift it up.It was a lore more 'loose' than the original contact dome, but it was durable.
INNOVATION IN MOTION The JC3000 joystick controller is designed for demanding applications in remote control chestpacks or auxiliary functions on industrial vehicles and other man-machine interfaces, where precise control, signal reliability, and compact size are important. The joystick is available with single or dual axis control, and can be specified with a choice of either long life potentiometer tracks, or switched output signals. Innovative design With a choice of potentiometer tracks that provide the analog signals proportional to lever movement or 3, 4 or 5 switched outputs per...
Potentiometric sensing Designed to interface with an electronic controller, the long-life potentiometer track generates analog outputs with switched reference signals that are proportional to the distance and direction over which the handle is moved. The analog output can be configured to provide signals for fault detection circuits, and a center tap provides an accurate voltage reference for the center position or a zero point for a bipolar supply voltage. The electrically independent switch operates with separate contacts each side of the joystick center position, in each available axis....
Lever operating torque XY 0.6 (full lever deflection at 31) Lever detent torque XY Lever breakout torque XY Maximum allowable torque XY Nm Lever operating angle 12.5 to 20 (full lever deflection, depending on gate and detent options selected) 31 max. in X and Y directions (Actual angle will depend on gate selected) Lever action Self centering, aligned X and Y Lever gate profiles Single axis in X or Y, square or plus Lever angle Gate Code Track Code Detent angles Maximum Z axis torque Expected life Weight 205 nominal, without handle fitted ENVIRONMENTAL Operating temperature Storage...
Lever operating torque XY 0.6 (full lever deflection at 31) Lever detent torque XY Lever breakout torque XY Maximum allowable torque XY Nm 12.5 to 20 (full lever deflection, depending on gate and detent options selected) Lever operating angle 31 max. in X and Y directions (Actual angle will depend on gate selected) Self centering, aligned X and Y Lever action Single axis in X or Y, Square or Plus Lever gate profiles Lever angle Gate Code Track Code Detent angles Maximum Z axis torque 205 nominal, without handle fitted ENVIRONMENTAL Operating temperature Storage temperature -40 to +85...
DIMENSIONS Note: drawings not to scale 40.00 0.05 Mounting detail Holes to suit M3 screws Forward orientation feature on casting HLO handle shown (see page 10 for alternatives) X Lever angle (X) depends on gate selected. 5.0 nominal (mounting flange to pivot) The joystick is designed to be fitted from below the mounting panel, through a 50.75/51.00mm diameter hole. The effectiveness of the joystick flange sealing is dependent on the panel mounting surface being sufficiently rigid to compress the sealing gaiter. The surface finish of the mounting panel is critical to achieving an adequate...
A switch function can be incorporated by using the ZC1 external button switch or the ZCS internal switch to verify the change in signals from the joystick. Press to activate switch PERFORMANCE Maximum height above flange mm Maximum diameter mm Environmental sealing (IEC 60529) Number of switches Action Switch operating force Maximum current Expected electrical life Switch connections terminate on the Hirose DF3 series connector. Actual pin allocation depends on the joystick track type and gate selection. See page 5 for Analog Output version connections. See page 7 for Switched Output...
UC Mantei Center Cleanroom for Micro/Nano Fabrication is a central fabrication, processing, and characterization center intended to be used by a diverse campus-wide research community as well as industry. The more than 8,000 square foot facility includes areas of class 10, 100, 1000, and 10,000 clean room spaces. It includes lithography, metal and dielectric deposition, etching, oxidation, and optical and electrical characterization tools.
General Description: Contact angles describe the shape of a fluid drop in contact with a solid. FT instruments measure these by imaging the drop on a CCD camera and analyzing the captured images on a computer. Contact angle measurements are used to determine the cleanliness of surfaces, with applications from electronics materials such as semiconductors and hard disks all the way to metal working. Contact angles are also used to derive surface energy, and find application in evaluating surface treatments such as corona and plasma processing. Finally, contact angles are used to derive wettability parameters, for both absorbing and non-absorbing materials. Surface and interfacial tensions of fluids can be measured directly from drop shape. Surface tension will change in the presence of surfactants, and surfactant characteristics can be derived from these changes. Measurements can either be static, implying a sense of equilibrium, or dynamic, where they vary as a function of time. In this latter case, the change in drop volume on the surface reflects absorption.
General Description: Micro-Particle Image Velocimetry (PIV) system is designed to measure velocity fields of particle seeded flows with micron scale spatial resolution using PIV techniques. The light source is typically a double pulsed Nd:YAG laser that is coupled through an optical fiber into a fluorescence microscope and focused with a high numerical aperture on a microfluidic device.
The microflow is seeded with fluorescent particles. A microscope lens collects the particle signal that has a longer wavelength than the illuminating light. This signal is separated from the laser light by a filter cube and is recorded by a double-frame CCD camera. The double frame images are evaluated with conventional PIV algorithms.
General Description: The IX81 represents the most advanced motorized inverted microscope from Olympus. The IX81's modular frame and optical design provides 9 access ports for multiple input or output devices. Up to four ports can have simultaneous access to a primary image. With its built-in motorized Z-axis drive, 6-position nosepiece and light path selector, the IX81 is ready for multi-wavelength, advanced fluorescence and deconvolution techniques.
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