
4.SELECTING A MOTOR DESCRIPTIONS FOR FANUC AC SERVO MOTOR β series B-65232EN/03
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MTB Servo motor selection data table (models for positioning)
Machine type Machine model
CNC model FANUC Name
Item Axis name
Specifications of moving object
Direction of movement (horizontal, vertical, slant__degrees, rotation)
Weight of the moving object (including the workpiece) kg
Counterbalance kg
Table support (sliding contact, rolling contact, static pressure),
Frictional coefficient (*)
Feed mechanism (Select one of the following and enter the corresponding data.)
1 Ball screw: Diameter × pitch × length mm
2 Rack and pinion: Diameter of pinion, traveling distance per revolution mm
3 Others
Mechanical specifications
(Enter a typical operation pattern, if already determined, in the remarks field.)
Traveling distance of the machine per revolution of the motor mm
Total gear ratio
Inertia (Note "before deceleration" or "applied to the motor shaft.") kgfcms
2
Least input increment of CNC (resolution) mm
Maximum rapid traverse feedrate mm/min
Motor speed in rapid traverse min
-1
Acceleration/deceleration time in rapid traverse msec
Distance of positioning in rapid traverse mm
Frequency of positioning in rapid traverse frequency/min
At low speed time kgfcm
Steady-state load
torque
At rapid traverse time kgfcm
Backlash mm
Fill in these blanks when an external detector is used. (**)
Type of external position detector (detection unit, number of pulses, etc.)
Gear diameter and reduction ratio when a rotary encoder is used
Motor specifications
Motor model (desired size and output, if any)
FB type (when an absolute position detector is required)
Option (when a brake, non-standard shaft, etc. is required)
FANUC will fill in these blanks.
Command multiplier CMR
Detection multiplier DMR
Flexible feed gear FFG
Position loop gain sec
-1
Deceleration stop distance mm
Dynamic brake stop distance mm
Specifications of amplifier
Regenerative discharge unit
Specifications of transformer
Note
(*) Note the friction coefficient of the sliding surface if it is determined.
(**) An external position detector is required when:
- The positions of the motor and machine may be mechanically displaced, for example, by slippage of
a driving tire or an elongated driving chain.
(Example: Expansion of chain when chain is driver, etc.)
Version Date Name
3
2
Remarks
1
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A.Ar-1870-