Appendix 2-3-3 Servo Selection Results - Mitsubishi Electric MELDAS MDS-R Series Technical Specification And Instruction Manual

Appendix 2-3-3 Servo selection results

As a result of the servo selection calculations, the servo specifications for the Z axis of this machining
center have been determined.
Item
Servo drive unit
Servomotor
Regenerative resistor unit
The in the motor type will be decided based on separate machine specifications such as motor shaft
shape and absolute position system.
The following table shows the servo selections for all axes.
Axis type
Movement direction
Table support method
Table movement friction coefficient
Ball screw diameter
Ball screw length
Ball screw lead
Deceleration ratio
Primary side gear inertia
Secondary side gear inertia
Motor/ball screw connection section inertia
Mass of moving object installed on the machine
(table, etc.)
Mass of standard-added-moving object
(workpiece, etc.)
Rapid traverse rate
Target acceleration/deceleration time constant
Rapid traverse positioning frequency
Motor brake
Motor shaft conversion rotation load inertia
Motor shaft conversion linear movement load
inertia
Motor shaft conversion total load inertia
Motor inertia
Motor shaft conversion load inertia magnification
Motor shaft conversion unbalance torque
Motor shaft conversion friction torque
Motor shaft conversion total load torque
Motor speed during rapid traverse
Rapid traverse minimum
acceleration/deceleration time constant
Maximum torque during motor stop
Maximum load rate during motor stop
Regenerative energy per braking (per cycle)
MR-RB30 tolerable positioning frequency
MR-RB50 tolerable positioning frequency
Servo drive unit type
Servomotor type
Regenerative resistor type
Appendix 2. Selection
Item
Type
MDS-R-V1-80
HF203B
MR-RB30
Unit X axis
Linear
Horizontal
Rolling
% 5
mm 50
mm 1200
mm 10
1
kg . cm
2 −
kg . cm
2 −
kg . cm
2
10.0
kg 600
kg 100
mm/min 30000
ms 120
times/min 12
Without
kg . cm
2
67.4
kg . cm
2
17.7
kg . cm
2
85.1
kg . cm
2
38.3
-fold 2.22
N . m
0.0
N . m
0.55
N . m
0.55
r/min 3000
ms 118.1
N . m
0.55
% 4.0
J 852.3 (total of X, Y axes)
times/min 16.8
times/min 28.2
MDS-R-V2-8080
HF203
A2 - 13
Y axis
Linear
Horizontal
Rolling
5
50
1000
10
1
−
−
10.0
500
100
30000
120
12
Without
57.9
15.2
73.1
38.3
1.91
0.0
0.47
0.47
3000
106.4
0.47
3.4
16.8
28.2
HF203
MR-RB30
Z axis
Linear
Vertical
Rolling
5
50
1000
10
2/3
1.6
8.1
−
500
10
20000
100
12
With
26.5
5.7
32.2
47.9
0.84
5.3
0.27
5.57
3000
90.5
5.57
40.7
1470.6
19.6
32.6
MDS-R-V1-80
HF203B
MR-RB30