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Main => Main Forum => Topic started by: njchan on November 12, 2005, 11:06:51 am

Title: HELP: Reversed X-Axis on Trackball?!?
Post by: njchan on November 12, 2005, 11:06:51 am

I have a Happs Trackball with PS/2 interface PCB.

I've got it working in Windows for the most part ... only problem is the x-axis is reversed for some reason.  Meaning ...

when I move the ball up and down the cursor moves up and down ...

but when I move the ball left, the cursor goes right ?!?!  wtf?

and when I move the ball right, the cursor goes left ?!?!

anyone know how to fix this?  I tried reversing the connector on the trackball to PS/2 interface, but that didn't do anything.

any ideas?

Title: Re: HELP: Reversed X-Axis on Trackball?!?
Post by: Rocky on November 12, 2005, 10:58:54 pm

You need to swap a couple of pins on the Happs optical board.

Title: Re: HELP: Reversed X-Axis on Trackball?!?
Post by: Mark70 on November 13, 2005, 08:13:44 am

If you followed the instructions on the Optipac site, they're backwards.  They say where to connect the wire by colour for a happ trackball.  I followed it too and had the same results.  Just swap the x wires and the y wires.

Either that or you installed the track ball with the arrow that points to the monitor the wrong direction.

Title: Re: HELP: Reversed X-Axis on Trackball?!?
Post by: TOK on November 16, 2005, 01:37:56 pm

You mounted the trackball backwards. Flip it around.

Title: Re: HELP: Reversed X-Axis on Trackball?!?
Post by: seanp on November 16, 2005, 06:02:51 pm

Quote from: TOK on November 16, 2005, 01:37:56 pm

You mounted the trackball backwards. Flip it around.

Nope...  turning the trackball around 180degrees will result in the up/down axis getting reversed.  Somehow the lef/right leads are backwards.  I made my own mouse hack for my trackball, and did this exact thing by accident.  switch the pins for left/right, and voila it works fine.  If BOTH axis were moving the wrong way, then turning it around would fix it.

"when I move the ball up and down the cursor moves up and down ...
but when I move the ball left, the cursor goes right ?!?!  wtf?
and when I move the ball right, the cursor goes left ?!?!

Title: Re: HELP: Reversed X-Axis on Trackball?!?
Post by: TOK on November 17, 2005, 08:27:58 pm

I misread his post. I actually misread it on 2 counts, because when he said PS-2, I assumed it with the one with the hardwired harness.
Sorry for the confusion.