Datasheet

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Wachendorff data sheet Encoder WDG 40A - 4 of 5
Mechanically rugged
All encoders have double and clearance-free shaft
bearings with the maximum possible distance between
the bearings, thus obtaining maximum long-term load
capacity.
The bearings are treated with a special grease able to
withstand extreme temperatures, high speeds and loads,
as well as constant operation in reverse. The grease
remains stable over a long period of time. The indicated
radial-bearing load relates to the point F of the applied
force. The useful life of the bearings is stated in the
number of revolutions. The life can be converted into
hours using the following formula:
Life in hours =
RPMx60
Number of Revolutions
Encoder WDG 40 A
Suitable accessoires can be found on
or by ordering the Data
sheets accessoires for encoders.
Please ask about other available options.
www.wachendorff.de
Starting- Protecting at
torque shaft
< 0,50 Ncm IP50
Special low-friction bearings
Our WDG encoders are fitted with special sealing rings on the bearings. The
corresponding starting torque values are given in the following table or with the
appropriate encoder. Should you need a particularly easy-running low-friction encoder,
then WDG encoder models 40S, 40A, 58A, 58B and 58D can be ordered as “Low-
friction encodersAAC” please note the changes in the specifications.
When ordering a low-friction encoder, please use the appropriate standard encoder
order code and add the suffix code -AAC
Example: WDG40A as a particularly low-friction encoder:
WDG40A-100-AB-G24-K3-AAC
Shafts sealed to IP67
Encoder models WDG 40S, 58B and 90B can be supplied in a full IP67 version. This is
achieved using a ring type oil shaft seal. Please note the following specification
changes :
When ordering encoders with shaft protection to IP67, please add the suffix code -AAO
Example: WDG with IP67 shaft protection:
WDG 40A-100-AB-G24-K3-AAO
Max. Permitted Max. Starting-
RPM Shaft- PPR torque
Loading
axial radial
3.500 100 N 45 N 2.500 ca. 4 Ncm
Cable Length
Using Wachendorff encoder cable a cable run of up to 100m is possible (150m for
SINUS encoders). However the actual achievable cable length depends on the
possible effects of noise interference and should therefore be checked for each
individual case.
All WDG encoders can be ordered with different cable lengths. If more than 2m of cable
is needed, the standard order code should be extended with a three figure number,
which gives the cable length in decimetres.
Example: WDG 40A with side gland and 10m cable:
WDG 40A-100-AB-G24-K3-100
Changed specifications for low-friction encoder
Maximum Operating Speeds
The maximum operating speed is limited by the maximum mechanical operating
speed (shaft speed) and by the number of pulses per revolution (PPR). The
maximum operating speed is given in the specifications. The maximum speed with
relation to the pulse frequency can be expressed as follows :
Max. speed of rotation RPM=
Max. Frequency of encoder in Hz x 60
PPR of encoder
Max. Operating s peed
0
2000
4000
6000
8000
10000
12000
14000
1000 2000 3000 4000 5000
Pulses per revolution
Speed of
rotation in
RPM
1000 2000 3000 4000 5000
200 kHz
Radial bearing load F
Changed specifications for IP67 at shaft
Wachendorff Automation GmbH & Co. KG
Industriestrasse 7
D-65366 Geisenheim
Tel.: [phone] / 99 65 - 25
Fax: [phone] / 99 65 - 70
www.wachendorff.de