
2.MECHANICAL DESIGN HANDLING, DESIGN, AND ASSEMBLY B-65382EN/02
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2.6.5 Distance Coded Linear Encoder Mounting Position
For LiS 300A1/4, LiS 600A1/4, and LiS 900A1/4
The mounting position of the HEIDENHAIN's distance coded linear
encoder must follow that of an absolute linear encoder. The following
positional relationships and expressions must be satisfied at the same
time.
N SN SN SN SN SN S
L
Power line
Coil slider
Slider mounting screw
nearest to the power line
Magnet plate
mounting screw
Distance coded linear encode
S
Position of the head end face when
the encoder detects the origin
Mount a linear motor and linear encoder at the following position in
the figure above:
S = 30 × N (mm) N: Natural number or 0
Magnet end face on the magnetic
pole sensor side
L (mm) M: Natural number
N pole L=30×M+17.5±0.5 (mm)
S pole L=30×M+2.5±0.5 (mm)
CAUTION
1 Before mounting a linear encoder, check that the positive
direction of the linear motor matches the positive direction of
the linear encoder. If a positive direction mismatch exists, the
motor can become uncontrollable in the worst case. For the
method of checking, see Subsection 2.4.2, "Linear Motor and
Linear Encoder Directions".
2 If a linear encoder is mounted at an incorrect position, the
power factor can drop, and a soft thermal (OVC) alarm can be
issued. In addition, the motor can become uncontrollable in the
worst case. Before turning on the power to the machine after
machine assembly, recheck the positional relationships.
3 The distance coded linear encoder is an incremental encoder.
The magnetic pole sensor and position detection circuit C must
be connected in addition to the connections in the above figure.