Our SL will not peck drill properly. For example, G98 G83 R.1 Z-1.5 Q.2 Fxx, Instead of feeding .2 and retracting, it feeds .2 then another .2 and another .2 and so on until the finale Z is reached without retracting at all. I think its a parameter thats not set correctly but... No manual. Also its an MSC-516 control. Any help would be greatly appreaciated. Thanks, AJL.