Detailed Description; Electronic Gear - Mitsubishi Electric GENERAL PURPOSE AC SERVO MR-E- A/AG Instruction Manual

5. PARAMETERS

5.2 Detailed description

5.2.1 Electronic gear

CAUTION
The machine can be moved at any multiplication factor to input pulses.
CMX
CDV
The following setting examples are used to explain how to calculate the electronic gear:
(1) For motion in increments of 10 m per pulse
Machine specifications
Ballscrew lead Pb 10 [mm]
Reduction ratio: n
Servo motor resolution: Pt
CMX Pt
0
CDV S
Hence, set 20 to CMX and 1 to CDV.
Wrong setting can lead to unexpected fast rotation, causing injury.
POINT
The guideline of 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.
The following specification symbols are required to calculate the electronic
gear.
Parameter No.3
Parameter No.4
POINT
The following specification symbols are required to calculate the electronic
gear
Pb : Ballscrew lead [mm]
n : Reduction ratio
Pt : Servo motor resolution [pulses/rev]
: Travel per command pulse [mm/pulse]
0
S : Travel per servo motor revolution [mm/rev]
: Angle per pulse [ /pulse]
: Angle per revolution [ /rev]
1/2
10000 [pulses/rev]
Pt
10 10
0
n Pb
CMX
CDV
Electronic gear
n NL/NM
1/2
Servo motor
10000 [pulse/rev]
10000 20000
3
1000
1/2 10
5 - 25
1 CMX
50 CDV
Motor
Deviation
counter
Feedback pulse
Encoder
n
NL
Pb 10[mm]
NM
20
1
50 .