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Anyway to calibrate a CX80 Trak-Ball?


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#1 Atari Nut OFFLINE  

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Posted Fri Nov 10, 2017 8:32 AM

I have a CX80 that doesn't track correctly.  Movement to the left especially is sporadic.  The ball feels "rough" as you try to roll it to the left.  Is there anyway to fix these things?

 

On a non-related note, I'm having issues creating posts in Microsoft Edge today.  I can type the topic of the posts fine but in the body of the post, I can't type spaces.  The page just jumps to the bottom.



#2 kheller2 OFFLINE  

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Posted Fri Nov 10, 2017 8:46 AM

If the ball physically feels rough you could have dirt built up on the rollers -- similar to an old ball mouse, you will need to clean the dirt off them by opening it up.

The bearings inside as well could be going and causing it to snag



#3 Atari Nut OFFLINE  

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Posted Fri Nov 10, 2017 3:43 PM

How many screws hold this together...4?  Are they under the rubber feet?



#4 _The Doctor__ OFFLINE  

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Posted Fri Nov 10, 2017 3:53 PM

lubing and working the bearing always worked for me, but if they get too bad you gotta replace 'em



#5 Nezgar OFFLINE  

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Posted Sat Nov 11, 2017 9:13 AM

Just 4 screws to open it up, not under the rubber feet.

Use a drop of 3-in-1 oil on each of the roller bearings after cleaning off any dirt buildup.

#6 Atari Nut OFFLINE  

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Posted Sat Nov 11, 2017 1:33 PM

Just 4 screws to open it up, not under the rubber feet.

Use a drop of 3-in-1 oil on each of the roller bearings after cleaning off any dirt buildup.

 

On the CX80?  I can't see any screws...that's why I figured they may be under the rubber feet.  Where are they?



#7 Nezgar OFFLINE  

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Posted Tue Nov 14, 2017 2:04 AM

On the CX80?  I can't see any screws...that's why I figured they may be under the rubber feet.  Where are they?

 

Ah sorry, yes sorry I was thinking CX-22 when I wrote that... I don't have a CX-80, but I did find this picture which shows where 4 screws posts are when viewed from the inside:

 

Attached Thumbnails

  • trackball_atari_cx80_hack_04.jpg


#8 BigO OFFLINE  

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Posted Tue Nov 14, 2017 6:34 AM

I have a CX80 that doesn't track correctly.  Movement to the left especially is sporadic.

One possible cause of that behavior is dust or debris interfering with the optical encoders. 

#9 _The Doctor__ OFFLINE  

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Posted Tue Nov 14, 2017 9:57 AM

'feeling rough' = dirty rollers/balls/bearing with bearings needing lube. Lack of response with smooth operation = dirty/defective encoders, blowing them out wiping and clearing can help those as well.. just clean and blow out everything and make sure only bearings are lubed.


Edited by _The Doctor__, Tue Nov 14, 2017 10:27 AM.


#10 Atari Nut OFFLINE  

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Posted Tue Nov 14, 2017 4:36 PM

Ok thanks...the screws are under the feet. The bearings are on the right side and bottom only.  On the left side at about 10 o'clock, there is small wheel.  That may explain why rolling to the left (9 o'clock) is rough...I'm not rolling square with the wheel.  Looking at the pics, can you point out exactly where to lube?

Attached Thumbnails

  • right and bottom.jpg
  • left.jpg


#11 Nezgar OFFLINE  

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Posted Wed Nov 15, 2017 12:28 AM

So these are your rollers: - hopefully you can get in there to remove them temporarily.

rollers.jpg

 

And these are my rollers (CX-22): - your rollers may be similar

IMG_20171115_000853a.jpg

 

And here is one of my rollers: - and I drew in red where it rotates on, which is where I put a couple drops of 3-in-1 oil and work it in. Make sure to wipe off any if it gets on the outer or inner rims.

IMG_20171115_000825a.jpg


Edited by Nezgar, Wed Nov 15, 2017 12:29 AM.


#12 Atari Nut OFFLINE  

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Posted Wed Nov 15, 2017 3:59 PM

Excellent pics.  Thank you very much.  Even looking at your CX22, you see how rolling it to the left will "bind" just a bit against that single roller that's at that 45 degree angle?



#13 _The Doctor__ OFFLINE  

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Posted Wed Nov 15, 2017 4:13 PM

it doesn't bind as the ball is round, very hard and should be highly polished. The ball and the bearing move enough to prevent it 'binding' if clean the ball is polished and the bearing is free moving and properly lubed


Edited by _The Doctor__, Wed Nov 15, 2017 4:14 PM.





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