Mitsubishi Electric MELSERVO-JN Series Instruction Manual page 104

4. PARAMETERS
4.1.7 Electronic gear
No. Symbol
Electronic gear numerator
PA06 CMX
(Command pulse multiplying factor numerator)
Electronic gear denominator
PA07 CDV
(Command pulse multiplying factor denominator)
CAUTION
(1) Concept of electronic gear
The machine can be moved at any multiplication factor to input pulses.
Command
input pulses
Note. This process converts the number of pulses required to rotate the servo motor one turn to the value set in parameter No. PA05.
CMX parameter No.PA06
CDV =
parameter No.PA07
The following setting examples are used to explain how to calculate the electronic gear.
Parameter
Name
Incorrect setting may cause unexpectedly fast rotation, resulting injury.
POINT
The electronic gear setting range is
If the set value is outside this range, noise may be generated during
acceleration/deceleration, or operation may not be performed at the preset
speed and/or acceleration/deceleration time constants.
Always set the electronic gear with servo off state to prevent unexpected
operation due to improper setting.
Parameter No. PA05
FBP conversion
(Note)
Value converted to the number of command
input pulses per revolution (FBP)
POINT
The following specification symbols are required to calculate the electronic gear
Pb : Ballscrew lead [mm]
1/n : Reduction ratio
: Travel per command pulse [mm/pulse]
0
S : Travel per servo motor revolution [mm/rev]
: Angle per pulse [ /pulse]
0
: Angle per revolution [ /rev]
Initial
value
1
1
1 CMX
50 < CDV < 500.
Parameter No. PA06 , PA07
CMX
CDV
4 - 7
Control mode
Setting
Unit
range
Position
1 to
65535
1 to
65535
Servo motor
Deviation
M
counter
Encoder
Internal Internal
speed torque