DA98D User Manual
65
Chapter Nine Order Instructions
9.1 Capacity Selecting
The determination of capacity of the servo system must comprehensively consider factors like
load inertia, load torque, required positioning precision and maximal speed. The following
steps are recommended for the considerations:
1
)
Calculating Load Inertia and Torque
By referring to related data, make a calculation on load inertia, load torque,
acceleration/deceleration torque and effective torque, which will serve as the basis for
choice at the next step.
2
)
Initial Determination of Machinery Gear Ratio
According to the required maximal speed and rotation rate of motor, make a calculation
on the maximal machinery deceleration ration. This ratio and the minimal gyration unit of
motor will be used to calculate whether the requirement for minimal position unit is
satisfied. If a relatively high position precision is required, increase the machinery
deceleration ratio (the actual maximal speed is decreased) or choose motor with higher
rotation rate.
3
)
Calculating Inertia and Torque
The load inertia and torque can be converted to the motor shaft with machinery
deceleration ratio. The converted inertial shall be no more than 5 times of the inertia of
the motor rotor and the converted load torque and effective torque shall be not higher
than the rated torque of motor. If these requirements cannot be satisfied, increase
machinery ratio (the actual maximal speed is decreased) or choose motor with greater
capacity.
9.2 Electronic Gear Ratio
Refer to Chapter Four (Table 4.2 Functions of Parameters), Chapter Six (Parameter Setting)
and Chapter Seven (7.3 Adjustment) for the meaning and adjustment of electronic gear ratio
G.
Under position control mode, the actual speed of load is:
command pulse speed×G×machinery deceleration ratio.
Under position control model, the actual minimal displacement of load is:
minimal command pulse itinerary×G×machinery deceleration ratio.
Note: When the electronic gear ratio G is not 1, the dividing operation of G may have a
Summary of Contents for DA98D
Page 1: ...DA98D Digital AC Servo Drive Unit User Manual V5 00 ...
Page 15: ...DA98D User Manual 4 Fig 1 1 Appearance of Servo Drive unit 2 Servo motor appearance ...
Page 16: ...DA98D User Manual 5 Fig 1 2 Servo Motor Appearance ...
Page 23: ...DA98D User Manual 12 Fig 3 1 Standard Wiring for Position Control Mode AM26LS32 Receiver ...
Page 24: ...DA98D User Manual 13 Fig 3 2 Standard Wiring for Speed Control Mode AM26LS32 Receiver ...
Page 71: ...DA98D User Manual 60 Installation Dimension Drawing for BS 120 Model ...
Page 72: ...DA98D User Manual 61 Installment Dimension Drawing for BS 200 Model ...
Page 73: ...DA98D User Manual 62 Installment Dimension Drawing for BS 300 Model ...
Page 74: ...DA98D User Manual 63 Installment Dimension Drawing for BD 80 Model ...
Page 75: ...DA98D User Manual 64 Installment Dimension Drawing for BD 120 Model ...