A/B/Z-Phase Differential Output Linear Encoder - Mitsubishi Electric Melservo MR-J5 Series User Manual

1.8

A/B/Z-phase differential output linear encoder

Precautions
• When using an A/B/Z-phase differential output linear encoder, use an MR-J5-_-RJ.
This section explains the connection of the A/B/Z-phase differential output linear encoder. Prepare the MR-J3CN2 connector
set for the encoder cable, and fabricate the cable according to the following wiring diagram.
Page 59 Internal wiring diagram
A/B/Z-phase differential output linear encoder specifications
Each signal of the A, B, and Z-phase of the linear encoder is provided in the differential line driver output. The signals cannot
be provided in the open collector output.
The phase differences of the A-phase and B-phase pulses and the pulse width of the Z-phase pulse need to be 200 ns or
more.
The output pulse of A-phase and B-phase of the A/B/Z-phase differential output linear encoder is in the multiply-by-four count
method.
The linear encoder without Z-phase cannot perform a homing.
The tolerable resolution range is between 0.001 μm and 5 μm. Select a linear encoder within the range.
Encoder
LA, LB, LZ
LAR, LBR, LZR
Am26LS31 or
equivalent
Connection of servo amplifier and A/B/Z-phase differential output linear encoder
Servo amplifier
CN2
CN2L
1 LINEAR ENCODER
58
1.8 A/B/Z-phase differential output linear encoder
LA
LAR
LB
LBR
LZ
LZR
Thermistor of linear servo motor
Connector set
MR-J3CN2 (optional)
Phase difference: 200 ns or more
1 pulse of Z-phase = 200 ns or more
A/B/Z-phase differential output linear encoder