Detailed Description; Electronic Gear - Mitsubishi Electric MR-J2S-A Instruction Manual

5. PARAMETERS

5.2 Detailed description

5.2.1 Electronic gear

CAUTION
(1) Concept of electronic gear
The machine can be moved at any multiplication factor to input pulses.
CMX Parameter No.3
CDV Parameter No.4
The following setting examples are used to explain how to calculate the electronic gear.
(a) For motion in increments of 10 m per pulse
Machine specifications
Ball screw lead Pb 10 [mm]
Reduction ratio: n
Servo motor resolution: Pt
CMX Pt
0
CDV S
Hence, set 32768 to CMX and 125 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.
Always set the electronic gear with servo off state to prevent unexpected
operation due to improper setting.
POINT
The following specification symbols are required to calculate the electronic
gear
Pb : Ball screw 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
131072 [pulses/rev]
Pt 131072
3
10 10
0
n Pb 1/2 10
5 - 26
WWW.NNC.IR
1
50
CMX Deviation
CDV counter
Feedback pulse
Electronic gear
n
n NL/NM
1/2
NL
Pb 10[mm]
NM
Servo motor
131072 [pulse/rev]
262144 32768
1000 125
CMX
500.
CDV
Motor
Encoder