Maintaining the Parallel Rod System

Overview

Periodically verify and replace the parallel rods in accordance with the maintenance schedule.

Small amounts of grease at the ball end bearings do not constitute damage. Carefully remove deposits at the bearing seals using a lint-free cloth.

NOTICE
DAMAGED BEARINGS
  • Use a lint-free cloth for cleaning.
  • Do not clean dry deposits using compressed air.
  • Do not use solvents such as trichloroethylene, tetrachloromethane, or hydrocarbons nor sharp-edged objects, emery cloth, or emery paper.
  • Minimize the mechanical impacts when cleaning.
Failure to follow these instructions can result in equipment damage.

Verifying the Wear of the Parallel Rod Ball End Bearings

Step

Action

1

NOTE: Do not remove the robot arm for this verification.

Move both upper arms in a horizontal position.

2

Verify the bearings for backlash by pushing and pulling both parallel rods perpendicular to the robot working plane (apply about 30 N (6.7 lbf) at the middle of the rods).

NOTE: When testing, differentiate between the real backlash of the system as opposed to the resistance of the components to movement.

3

Replace the parallel rod if the noticed backlash exceeds the needs of your application.

For further information, refer to Replacing the Parallel Rods.

Lubricating the Parallel Rod System

Apply grease by using a grease gun to the grease nipple, DIN 71412 H1 (minimum size 12).

NOTE: Use aluminum-complex-soap grease, approved according to USDA H1.

Temperature range: -45…+120 °C (-49…+248 °F)

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Schneider Electric.

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