I just purchased a Tree 425, with Baldor servos and Dynapath 40 controller. The X axis is very jerky when jogging. Wide open rapid looks and feels pretty good. X / Y interpolating is notchy also unless feed is turned down to about 3 IPM. Otherwise straight X and Y moves look good when running a program. The machine is well lubed and the screw turns very easily with the bolt on the end. I have read where perhaps the tach and encoder are dirty? I pulled the end off and all looked pretty clean but did not want to start ripping things apart until I got some advise from you all. The brushes on the motor are very clean, free and have lots of meat still on them.
Can someone give me some pointers on how to clean these parts?