Mitsubishi Electric MDS-E Series User Manual

MDS-E/EH Series Instruction Manual
5 Servo Adjustment
264
IB-1501229-F
5.3 Characteristics Improvement
5.3.1 Optimal Adjustment of Cycle Time
The following items must be adjusted to adjust the cycle time. Refer to the Instruction Manuals provided with each CNC
for the acceleration/deceleration pattern.
[1] Rapid traverse rate (rapid) : This will affect the maximum speed during positioning.
[2] Clamp speed (clamp) : This will affect the maximum speed during cutting.
[3] Acceleration/deceleration time constant (G0t*, G1t*) : Set the time to reach the feedrate.
[4] In-position width (SV024) : This will affect each block's movement command end time.
[5] Position loop gain (SV003) : This will affect each block's movement command settling time.
(1) Adjusting the rapid traverse
To adjust the rapid traverse, the CNC axis specification parameter rapid traverse rate (rapid) and acceleration/
deceleration time constant (G0t*) are adjusted. The rapid traverse rate is set so that the motor speed matches the
machine specifications in the range below the maximum speed in the motor specifications. For the acceleration/
deceleration time constants, carry out rapid traverse reciprocation operation, and set so that the maximum current
command value at acceleration/deceleration is within the range shown below. The output torque is limited at areas
near the maximum speed, so monitor the current FB waveform during acceleration/deceleration and adjust so that
the torque is within the specified range.
If the drive unit's input voltage is less than the rated voltage, the torque will easily become insufficient, and
excessive errors will occur easily during acceleration/deceleration.
Maximum tolerable current command value when adjusting the rapid traverse acceleration/deceleration time constant
MDS-E Series (200V) MDS-EH Series (400V)
Motor
model
Max. current
command value
Motor
model
Max. current
command value
Motor
model
Max. current
command value
HG46 Within 380% HG-H75 Within 350% HQ-H903 Within 250%
HG56 Within 390% HG-H105 Within 270% HQ-H1103 Within 210%
HG96 Within 260% HG-H54 Within 420%
HG75 Within 350% HG-H104 Within 350%
HG105 Within 270% HG-H154 Within 380%
HG54 Within 420% HG-H204 Within 310%
HG104 Within 350% HG-H354 Within 330%
HG154 Within 380% HG-H453 Within 250%
HG224 Within 310% HG-H703 Within 240%
HG204 Within 310% HG-H903 Within 290%
HG354 Within 420% HG-H1502 Within 190%
HG123 Within 190%
HG223 Within 230%
HG303 Within 240%
HG453 Within 300%
HG703 Within 240%
HG903 Within 290%
HG142 Within 190%
HG302 Within 210%

Mitsubishi Electric MDS-E Series Specifications

General

Brand	Mitsubishi Electric
Model	MDS-E Series
Category	Control Systems
Language	English