Hi I am using a five axis grinding machine with fanuc 160i. Looks like some parameters are messed up. The machine jerks hard during end of a cut. Tried changing some values for 1420 , 1421 , 1620, 1621 but the problem still exists. can any one help.

1420
x 8500 (horizontal table)
y 4000 (front back table horizontal)
z 8500 (vertical up and down)
b 20000 ( work head)
c 2100 (rotary table)

1421 (i am doubting this is not correct)
200
200
200
200
200

1620
40
40
40
40
120

1621
400
400
400
400

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