5.1. Grease Replenishment/Replacement
5.1. Grease Replenishment/Replacement
| Attention
If greasing is performed incorrectly, the internal pressure of the grease bath may suddenly increase, possibly causing damage to the seal, which would in turn lead to grease leakage and abnormal operation. When performing greasing, therefore, observe the following cautions. |
(1) Make sure to wear safety glasses before injecting grease and inspection.
(2) Before starting to grease, remove the plug from the grease outlet.
(3) When loosening a plug, grease and the plug could be discharged. Block the outlet with a thick cloth to prevent injuries caused by discharged grease or plug, and keep a distance away for safety. (Do not look into the grease outlet.)
(4) Whenever possible, avoid using a compressed-air pump, powered by the factory air supply. If the use of a compressed-air pump is unavoidable, restrict the greasing pressure less than 1.5bar(1.5kgf/cm2, 0.15MPA)
(5) Use grease only of the specified type. If not, may damage the reducer or lead to other problems.
(6) After greasing, check if there is any leakage and pressure. Remove the remaining pressure as suggested and connect the plug.
(7) To prevent accidents caused by slipping, completely remove any excess grease from the floor or robot.
(8) When an ambient temperature is more than 35℃, be sure to shorten the period of replenishment in half.
(9) Tip for preoutleting leakage due to overpressure and over injection of grease in the reducer
1) When adding or replacing grease, add as much grease as you have drained.
2) Open the outlet after every 6,000 hours of operation to remove the pressure in the reducer.
n Procedure in discharging excessively fueled grease and residual pressure after grease replacement and injection
(1) Attach a grease receiver or a hose to the grease outlet to prevent contamination from discharged grease.
(2) Operate it within a range without surrounding and interference under the following conditions.
axis | Operation angle (1 axis /2 axis /3 axis) | Operation speed | Operation time |
1 axis ~ 3 axis | 80°/90°/70° or more | 100 % | Minimum of 20 minutes |
4 axis ~ 6 axis | 60°/120°/60° or more | 100 % | Minimum of 20 minutes |
Arm gear box | 60°/120°/60° or more | 100 % | Minimum of 20 minutes |
(3) Wipe the outlet port with a cloth and attach the plug.
n Periodic Replenishment / Replacement
Grease exchange cycle
ü S-Axis Reducer : every 24,000 hours ü Other Reducers : every 12,000 hours ü Bearing : every 6 months ü Arm Frame gear box : After every 6–7 years (or after an overhaul) |
If there is still noise in the reducer even after using specified grease, check the state closely for 1-2 days during operation. Generally, the noise will go away.
(The noise will go away if you run the axis at a high speed for 5-10 minutes).
The noise may be caused by following reasons
1. Operation after greasing or replacing the reducer
2. Operation after long-term storage
3. Operation at a low speed
4. Operation at a low temperature