B-65382EN/02 HANDLING, DESIGN, AND ASSEMBLY 2.MECHANICAL DESIGN
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LiS 1500B1/4 or models of larger sizes
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 S N S N S N S N S
Coil slider
L
Power line
or terminal
Distance coded linear encode
S
Position of the head end face
when the encoder detects the
Mount a linear motor and linear encoder at the following position in
the figure above:
S = 60 × N (mm) N: Natural number or 0
Magnet end face on the power line
(terminal) side
L (mm) M: Natural number
N pole L=60×M+27±0.5 (mm)
S pole L=60×M+57±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.