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Sounds like the chuck confirmation prox. Some machines have open, closed, and partial stroke to signal that a part is in the jaws. Check them at the I/O page to eliminate wiring or board problems.

Try SANYO DENKI AMERICA INC

Sounds like there is uneven wear on the screw.That is normal, as most cutting is done in one area, and the directional noise may be that one side of the groove in the screw is more worn.

Fadal control is not like most CNC controlers as most of the data is on an Eprom. Most user settings like Back lash are entered by hand.

Sounds like the 'brown out" circuit is acting up?

Koma Precision, Inc. | Rotary Tables | Angle Heads | Lathe Tools | Tool Presetters

reset switch on the relay for the Z, is that a motor starter with an overload block? If so the contacts in the OL are likely stuck. That would give the control the signal that the thing is still...

You maybe able to disable the scales, check the Keep relays listing.