
4. SERVO FUNCTION DETAILS B-65150E/04
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This function changes the timing to force MCC off, using a software
timer, thus preventing the tool from dropping. Fig. 4.10 (e) shows the
timing diagram.
Fig. 4.10 (e)
NOTE
(*) The servo alarm mentioned in the above description
refers to a servo alarm detected by the software
(OVC alarm, motor overheat alarm, software
disconnection alarm, etc.), an alarm detected by the
servo amplifier, or a servo alarm detected by the CNC
(excessive error).
If a servo alarm occurs on the axis using this function,
no brake control is performed on the axis (except for
a motor overheat alarm).
Alarm or emergency
stop signal
Mechanical brake
Servo amplifier
MCC off
Brake control timer: Should be longer (approximately 200 ms) than the
time (50 to 100 ms) during which the mechanical brake is applied.
50 to 100 ms (approximately)
The timing when *ESP is input to the PSM should be longer than
the brake control timer.
*ESP signal to PSM (+24 V)
The control current
sustains the tool.
The control current
and mechanical
brake sustain the
tool.
The mechanical
brake sustains the
tool.