Schneeberger MONORAIL Series Mounting Instructions page 67

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Maintenance
Fig.117
Fig.118
Replacing ASM/ABM metal wipers
1. Loosen the screws on the front plate.
2. Pull the wiper over the guide rail end.
3. Mount a new metal wiper over the guide rail end.
4. Tighten the fastening screws until the wiper can no longer be moved by hand.
5. Use a feeler gauge and relevant documentation to ensure an even gap between
the guide rail and wiper edge.
6. Hold the metal wiper and tighten the fastening screws. For tightening torque, see
„12.2 Screw tightening torques" on page 73.
7. Check the gap again after tightening the screws.
8. It must be ensured that the gap is maintained when the carriage is mounted onto
a guide rail with an installed MAC cover strip.
1 ASM metal wiper
2 Fixing holes
3 MAC cover strip
4 MR guide rail
5 Surrounding gap
Gap dimensions:
a = 0.9 mm ± 0.05 mm
b = 0.25 mm ± 0.05 mm
When using an AMS guide rail, the ASM-A metal wiper must be used. This is shortened
by 2 mm on both sides at the prism base (dimensions b).
This metal wiper can be identified by a frontal marking.
Rail covers
Rail covers include plugs, cover strips, and bellows. These are prerequisites for
ensuring the proper functioning of the carriage seal system and one of the factors
responsible for ensuring that the guideway provides an extended service life. Rail
covers should be checked at regular intervals (at least every 6 months) for damage
and wear, and replaced where necessary.
Plugs
Plugs must be fitted flush with and parallel to the guide rail surface. Protruding
or scratched plugs may cause damage to carriage wipers. Where plugs sit too deeply,
this may lead to the build-up of dirt in the guide rail fixing holes or to damage
to carriage wipers caused by the sharp edges of these holes.
Checking plugs
Check plugs for dirt and swarf in the fixing holes or on the guide rail surface. Dirt and
swarf that are not wiped away as the carriage passes over the guide are indicative
of improperly functioning plugs. Plugs should be replaced in this case and carriage
wipers checked.
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