cincinnati arrow 500 y axis sticking

[andywn]

hello i have a cincinnati arrow 500.
when in programe the y axis keeps sticking.
give the table a little tap with a mallet and it moves again.
anyone have any ideas??? please

[Mr Bonavita]

What year. what control.?
Are you getting an alarm message?

[andywn]

No alarm code.
Heidenhain
1998