I am getting chatter during any change of direction (x,y) at any feed over 20ipm and nobody can seem to figure it out. The chatter is only for a split second after directino change them it will run smooth as glass. This machine would be perfect if I could only fix this issue. Its a 96 4020,dc motor, box way, 10k spindle, 700ipm rapid, 88hs control.
Here is what we have done so far.
-checked gains. they are good.
-replaced x,y resolvers
-replaced x,y gibbs
-checked table flatness. within a couple thou.
Anyone with any further ideas? Here are some pictures of the issue. This was 80ipm.