Hi
I have a 1986 QT20N with Mazatrol T2 got from a auction with a spindle problem.
On gear 1 machine get to 900 rpm but brake to 0 rpm is taking over 6 seconds. Acceleration to rpm's is ok.
On gear 2 machine get to 2200 rpm but deceleration to 0 rpm is taking over 10 second. Even so! When machine is braking in gear 2 never manage to stop. I get Alarm 20 NMI emergency stop and Alarm 204 Spindle controller malfunction. Alarms are disappearing after shutdown an main braker in OFF position for couple seconds.
I don't think it's normally for the machine to take so long to stop the spindle. I've seen some videos on YouTube and there was a much faster deceleration.
It is reasonable to suspect that Alarms 20 and 204 have same cause?
Anybody faced this issue?