Need Help!- Replacing Trackball with computer mouse

[dbart]

Hi,
I am working on a Hurco KM3, trying to bring it back to life after several years in storage. The control boots up and I can move all three axis but I can only move the cursor in the horizontal plane on the graphics monitor. When I took the trackball apart and put the output on a scope one of the outputs on the vertical movement always remains high.
I thought an older computer mouse with the mechanical ball would work so I hooked the outputs off of the opto inturrupter into the Hurco. Good news & bad news!!
Good new is that the cursor will now move.
Bad news is that it moves uncontrollably.
Looking closer at the output from the mouse on the scope it seems that the mouse pluses the output from the opto inturrupter. So my guess is the Hurco controller is seeing these pulses and thinking that it needs to move the cursor.
Is there any easy way to not have the output pulse from the mouse?
Thanks in advance on any help that you can give me.
David

[amishx64]

The opto on the ball mouse operates buy pulsing when a black bar vs an empty spot on the wheel moves past the slot. You can't 'remove' this as it is an integral part of how the mouse works. OR am I no understanding what you are saying?

Can you post pics of the wires from the old trackball and the sensors on o near the ball? That will give me a better idea.

If the communications is the same (serial, ps2) couldn't you just replace the whole tracball?

[dbart]

You are correct that the opto pulses when it sees a clear spot on the disk. What I saw on the scope with the computer mouse is a pulse even when the mouse was not moving. I wasn't very clear on my first post. In doing some reading on the mouse circuit, it seems that the optos on the mouse pulse with a certain frequency and the chip in the mouse is looking for that frequency to weed our interference from outside light sources. I am trying to find a way for the mouse optos to not pulse when they are not moving and the optos are not being blocked and unblocked. I would post a picture of the old track ball but it is at the shop and I won't be back till Monday.
I believe that the input from the track ball to the Hurco control is the same as an old mouse that had to plug into a card into the back of the computer. ie pre PS2, pre serial.
I hope that clears up some 1questions.
Thanks,
David