MTS Criterion Series 60 - Manual (Page 131)

Reason Check Issue
too close to each other (piston moving
down or crosshead moving up).
The servo error represents a position
error (command minus feedback). If Check the servo error limit.
the servo error is large, it indicates the
controller is having problems. This
error detector is part of the safety
system that can help detect problems
with the feedback (cable disconnected,
sensor bad). The machine can achieve
higher speeds with the actuator moving
up than down. A likely reason for
tripping the servo error limit is
commanding down motion at speeds
greater than which the machine is
capable.
Digital inputs can be programmed as
a program stop function. Check if a digital input is programmed
as a stop. Program stops.
Check if there is any oil leakage on
the main frame and the hydraulic
source. Cannot reach full-scale
load.
After heavy use, the viscosity of the oil
may decrease. Check the viscosity of the hydraulic
oil.
Check whether the safety relief valve
pressure is set too low.
MTS Criterion ™ Series 60 | 131
Troubleshooting