Mounting
The blind hollow shaft of the rotary encoder is slid onto the motor’s drive shaft and fastened
with a central screw. For the 1KA encoder shaft it is particularly important to ensure that
the positive lock securely engages the corresponding slot in the measured shaft. The stator
is mounted by a centering diameter with two mounting screws. Screws with materially
bonding anti-rotation lock are to be used (see
Mounting accessories
).
Conditions required on the motor side for a safe mechanical connection:
Mating shaft
Mating stator
Material
Steel
Aluminum
Tensile strength R
m
≥
600 N/mm
2
≥
220 N/mm
2
Shear strength
τ
m
-
≥
150 N/mm
2
Interface pressure P
G
≥
500 N/mm
2
≥
200 N/mm
2
Surface roughness R
Z
≤
10 µm
≤
10 µm
Coefficient of thermal expansion
α
therm
(10 to 17)
×
10
-6
K
-1
≤
25
×
10
-6
K
-1
Mounting accessories
Screws
Screws (mounting screws, central screws) are not included in delivery. They can be ordered
separately. The screws from HEIDENHAIN feature a coating as per DIN 267-27 which,
after hardening, provides a materially bonding anti-rotation lock. For this reason the screws
cannot be reused. Unused screws are not storable indefinitely. The minimum shelf life is
2 years (storage at
≤
30 °C and
≤
65 % relative humidity). The expiration date is printed on the
package.
ECI 1119; EQI 1131
Screws
1)
Lot size
Central screw
for
fastening the shaft
ISO 4762-
M3
×
25
-8.8-
MKL
ID 202264-86
10 or 100
pieces
Mounting screw
for
flange
ISO 4762-
M3
×
10
-8.8-
MKL
ID 202264-87
20 or 200
pieces
1)
With coating for materially bonding anti-rotation lock
Please note:
The adhesive on the screws with materially bonding coating hardens quickly.
Screw insertion and application of tightening torque must therefore take no longer than
5 minutes (see dimension drawing). The required strength is attained after 6 hours at room
temperature. The curing time increases with decreasing temperature. Curing temperatures
below 5 °C are not permissible.
Mounting aid
for engaging and disengaging the PCB connector. The mounting aid prevents
damage to the cable because it applies the pulling force solely to the connector. Tension must
not be applied to the wires.
ID 1075573-01
For further mounting information and mounting aids see the Mounting Instructions
and the Encoders for Servo Drives catalog. The installation can be inspected with the
PWM 20 and ATS software (see document 1082415)