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Installation Guide Linear Modules
9 Maintenance and Test Instructions
The linear ball bearings of DM01 linear modules are provided with initial lubrication at the factory. Lubrication
and inspection intervals depend mainly on the average travel speed, operating temperature and grease
quality. The following table with the inspection intervals is based on normal industrial, central European
conditions (5 days week with 8 hours operating time per day) and the use of the recommended bearing
grease SKF LGFP 2.
Velocity [v]
v < 1 m/s
1 m/s < v < 1.5 m/s
v > 1.5 m/s
In principle, the inspection cycle of the drive unit must be shortened if there are heavy loads or deviating
conditions. These are, for example:
•
Permanent soiling
•
Direct sunlight
•
Low humidity
•
Outdoor operation
•
Strong shocks or vibrations
•
Increased operating temperature
9.1 Inspection
According to the inspection intervals, the following tests must be carried out.
9.1.1 Linear Module
Do the guide shafts have too much clearance? If yes -> Replace bearing.
Do the guide shafts show signs of wear or grooves? -> If yes -> Replace guide shafts and the bearing.
Have the shaft bearings been relubricated? If no -> Cleaning + Lubrication
Is it easy to move the guide unit? If no -> Align mounting plates
Is the wiper without visible wear? If no -> Replace wiper
9.1.2 MagSpring
Is the slider covered with a light greasy film? If no -> Lubrication
Does the slider show signs of wear or grooves? If yes -> Replace slider
Does the MagSpring stator bearing show signs of wear? If yes -> Replace MagSpring
Is it easy to move the MagSpring slider? If no -> Cleaning (stator, slider) + lubrication
9.1.3 Pneumatic Holding Brake
Does the brake still exert the expected holding force? If no - > Replace the brake.
9.1.4 Noise Signature for DM01-48 Linear Modules
Depending on the environmental conditions, DM01-48 guides may produce a 'clicking' sound when moving
very slowly and in a quiet environment. This is due to the internal residual magnetic attraction on the
unloaded balls of the linear ball bearings and can be amplified in resonance depending on the module
length. This clicking noise is therefore system-related and has no influence on the technical functionality.
9.2 Cleaning
9.2.1 Guide Shafts
•
Remove the guide shafts according to chapter 7.3.
•
Clean the guide shafts with a soft disposable paper, possibly with the aid of a grease-dissolving cleaning
agent (e.g. benzine).
NTI AG / LinMot
Lubrication and inspection interval [km]
DM01-23 / 37 / 48
5000
2500
1200
ENG
Page 33 / 72
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