Adjustments are made to the escapement to improve its action. Move the pendulum to the left, marking the point where the clock ticks. Adjusting the pendulum escapement therefore, is adjusting the pendulum's relation to the escapement to bring it into harmonious equilibrium. The clock owner can accomplish this task in 10 minutes with a minimal amount of tools.
There are two kinds of power losses in a clock: frictional losses and losses caused by the action of the escapement (which result in additional frictional losses). The method used to adjust the escapement is different from clock to clock. Since we are experts in British grandfather clocks, the following pertains to that type of clock. …
These all have the ultimate goal of reducing power losses. Let the pendulum hang in its neutral position and place a piece of masking tape on the case just below the pendulum. The clock is carefully lubricated. Other repairs are made as needed. Mark the neutral point on the masking tape.