Need Help!- How to correct reversal spikes on haas?

[DaOne]

Long story short my CPU board required replacement. The software that was on the new board was the higher than what was on the original. All settings, parameters and serial number were put back into the machine. Everything works however I am seeing reversal spikes in testing that were not there before. Its not a backlash issue as it was tested and spot on. This is a 1995 VF-2 (brushed) with version 8.32n (old version was 8.24n). I need to know what parameters adjust this on a haas.

[DaOne]

Nobody?

[Wizzard of H]

What software version do you have now?
Parameters 138 and 139 are used to compensate for reversal.
Use of these parameters really requires a ball-bar setup to check the results.

[Wizzard of H]

Also might check old parameters from original board and use parameters 138 and 139 from there.

[DaOne]

138 is -192
139 is 192

Does this sound correct?

[Wizzard of H]

Those look like the right range of numbers BUT the sign is important. One is negative and the other is posiitive. It is still best to get the same numbers the machine had at shipment. The parameters would have been printed out. It also looks like parameter 138 shouild be PLUS and parameter 139 should be MINUS. You have the opposite. How old? What serial number?

[DaOne]

I sent you a PM with the info. Maybe you are able to get me the original .par file?