Mitsubishi Electronics MR-J2S- A Detailed description 5.2.1 Electronic gear, Parameter No.3

POINT

The guideline of the electronic gear setting range is

Wrong setting can lead to unexpected fast rotation, causing injury.

5. PARAMETERS

5.2Detailed description 5.2.1 Electronic gear

CAUTION

1 CMX 500.

50 CDV

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.

(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

Input pulse train

Motor

CMX Deviation

CDV counter

Feedback pulse

Electronic gear Encoder

The following setting examples are used to explain how to calculate the electronic gear:

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]

0: Travel per command pulse [mm/pulse]

S : Travel per servo motor revolution [mm/rev]

: Angle per pulse [ /pulse]

: Angle per revolution [ /rev]

(a)For motion in increments of 10m per pulse Machine specifications

Ballscrew lead Pb 10 [mm] Reduction ratio: n 1/2

Servo motor resolution: Pt 131072 [pulses/rev]

n

n NL/NM

1/2 NL

NM

Servo motor

131072 [pulse/rev]

Pb 10[mm]

CMX	0	Pt
CDV		S

0	Pt	10	10	3 131072	262144	32768
	n Pb			1/2 10	1000	125

Hence, set 32768 to CMX and 125 to CDV.

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