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fleskebacon:
I have a problem.

I've wired up the I-pac to a Sanwa JLF joystick, and I'm having a problem that I'm having a hard time finding the solution to.

The problem is, that sometimes I get a "double tap" from tapping the joystick in a direction. When tested in Notepad, I then get first one "tap" from the movement, and then another "tap" in the same direction when I release the joystick to the center.

In MAME games this doesn't seem to matter much, but in menus it's a real pain because the cursor often moves two steps with one tap.

The problem is intermittent and applies to various directions at various times, though most often in one specific direction. I haven't found a consistent way to provoke the problem to appear, but when I disconnect and reconnect the connector into the joystick a couple of times it sometimes goes away. But not always, and it reappears after a while.

I've checked everything in the I-Pac software, and I can't see any errors there - all buttons and joystick directions seem to be working perfectly.

I've also checked the Windows keyboard settings, disabled sticky keys, tried out various repeat settings and all that.

Tried two different joysticks of same make, they both have the same problem.

Checked all contacts, they seem good. Also tried to solder on the leads to the joystick to eliminate bad contacts there.

Tried searching various forums for a while without any luck...

Any ideas? Bad joystick or something else? Some sort of ghosting? The Sanwa joysticks are new, and are supposed to be "one of the best around", as I understand?
zanna5910:
If this is only a problem with your front end, do you have the key double mapped? 

Other possible: wiring issues, shorts, incorrect hookup (since you say you reconnect connector several times and it works again.)

Try to clear the ipac setting, then reprogram it.  If that doesn't work, try to re-write entirely the switch.  Try a different microswitch to see if that is the problem.
fleskebacon:
The error occurs everywhere, including Notepad. So the frontend setup is pretty much ruled out.

After some trial and error it's pretty clear that the joystick itself is the problem. When I press the microswitches manually everything's ok, and in 4-way mode the problem is not as noticeable as in 8-way.

I thought the Sanwas were top of the line?
rCadeGaming:
I doubt that the joystick is causing this.  I do agree that JLF's are top of the line, I've been using them for about 5 years, but with any brand I doubt the microswitches would cause an intermittent "double tap" like that.  If you want to be absolutely sure, replace the PCB on the JLF with the microswitches, or you could just wire up four to use for the four directions to rule it out.  I bet the problem won't change.

It's probably either a problem with your I-PAC hardware, or problems with it communicating with the PC.  What OS are you running?  How old is your motherboard?  Are the drivers up to date?  What kind of USB port are you using, 1.0/2.0/3.0?
fleskebacon:
I agree that it seems strange, but I really can't see what else could be causing this, as manipulating the microswitches in various ways is the only thing I can see triggering or removing the problem. Of course, the problem could lie elsewhere, as pushing the microswitches in different ways probably could cause the I-Pac or other stuff to react differently.

I run Windows 7 64-bit, on a reasonably new 3 GHz Core2Duo, probably USB 2.0. All drivers are updated. But the PC has been used for other stuff for a while, I could always try installing a fresh copy of Windows. Any version in particular that is recommended?
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