8.
Maintenance
8-2
KRF
8. Maintenance
8-3
Daily inspection
8-4
Periodical inspection
Before operating the product, visually check any exterior damage or stain.
Check the grease state (stain, etc.). If the grease is significantly stained, wipe off the
grease, and then supply new grease. (Supply the new grease until it comes out from the
inner block, and exhaust the stained grease. )
Check whether abnormal noise or vibration occurs during operation. If abnormal noise
or vibration occurs, immediately stop the machine and inspect the state of the product.
Insufficient lubrication or loosening of a mounting bolt can be a cause of abnormal noise or
vibration. Check for insufficient lubrication or loosening of a mounting bolt.
For the motor return type, we recommend you to adjust the belt tension after between
about two weeks and one month of operation.
· Initial elongation of the belt may lower the belt tension.
Perform more detailed inspection approximately once every 3 to 6 months.
· Check the lubrication state, and then clean the product and replenish the grease.
· Inspect whether each mounting bolt has loosened, and if any of them has loosened, retighten it.
Inspection of timing belt (for the products using timing belts)
· Adjust the belt tension. (See installation of motor)
* If you use the product with the belt tension low, it may adversely affect the performance.
· Check whether the timing belt contacts the flange part of the pulley.
If it contacts, adjust the alignment of the pulley.
* If you continue to use the product with the timing belt contacting the flange part, it may cause a
fracture of the flange or abnormal wear of the belt.
· Visually check an abnormal wear, scratch, or crack on the teeth or side of the timing belt.
8-5
Lubrication
The standard models are supplied with the following grease before shipment.
THK AFF grease
See the appendix for details of the greases.
For the normal use of the grease, replenish it approximately every 100 km travel
distance. However, note that the greasing interval varies with the service conditions or
the service environment. We recommend determining the greasing interval through the
initial inspection.
* Note that the greasing interval becomes shorter than usual in case of high-load use or under the
environment where oil content decreases.
* The long-term maintenance-free operation of the LM guide and ball screw part can be realized by
the effect of Lubricator QZ. However, We recommend determining the greasing interval through
inspections.
KRF does not have a grease nipple for lubrication, but apply grease to the inner block
from the grease inlet on the side face of the outer rail and directly to the ball screw shaft.
