Originally Posted by
Lene Madsen
Hi all.
I have Cincom L25, with M520L controller.
My live tools were making an unpleasant noice, so I thought they need cleaning and greasing. I take the live tools out and grease the gears.
When I put everything together I start getting the alarm:
42 FE1 Feedback error 1: A detector feedback pulse was omitted in the semiclosed loop system (including ball screw end detection).
In the AC spindle manual the description is:
(19) Alarm No. 42 : FEEDBACK ERROR (MOTOR PLG)
[Details] The one rotation counter value error pulse of the motor PLG exceeded the setting
value (SP90: PLE).
I have checked the cables, and there is no broken cables or bad connections. The machine can run at low speed for a while before alarm, the higher rpm on live tools the faster the alarm occurs.
Can anyone please help, hints or anything is welcomed! Thanks guys!