Replacing the Toothed Belt Pulley

Overview

Replacing the toothed belt pulley can cause unintended movements.

WARNING

UNINTENDED MOVEMENTS DUE TO DISMOUNTING

Secure the moving parts of the axis mounted in a vertical or tilted position against unintended movements.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Prerequisites

You need the following tools to replace the toothed belt pulley:

oSet of hex keys

NOTE: Do not use ball head hex keys. Excessive torque may cause, the ball head to tear off. A torn off ball head is difficult to remove from the screw.

For suitable parts, refer to Replacement Equipment and Accessories.

Procedure Overview

Perform the following procedures to replace the toothed belt pulley:

oPreparing the replacement of the toothed belt pulley

oRemoving the toothed belt pulley

oPreparing the mounting of the toothed belt pulley

oMounting the toothed belt pulley

Preparing the Replacement of the Toothed Belt Pulley

Step	Action
1	Remove the following components depending on the axis configuration: oShaft extension oMotor and/or gearbox oElastomer coupling
2	Remove the toothed belt.

Step

Action

Remove the following components depending on the axis configuration:

oShaft extension

oMotor and/or gearbox

oElastomer coupling

Remove the toothed belt.

Removing the Toothed Belt Pulley

Step	Action
1	Remove the four outer screws (1) at the axis body adapter plate (2).
2	Remove the axis body adapter plate complete with the toothed belt pulley (4) and the two deflection pulleys (3) as a unit. NOTE: If you want to replace the toothed belt only, omit the following steps.
3	Secure the deflection pulleys and the toothed belt pulley to keep it from falling and remove the two screws (5) in the middle at the axis body adapter plate.
4	Remove the deflection pulleys.
5	Remove the toothed belt pulley.

Step	Action
1	Remove the four outer screws (2) and the two screws in the middle (3) from the axis body adapter plate (1).
2	Remove the axis body adapter plate.
3	Remove the toothed belt pulley with bearings (5) carefully from the axis body (4).

Step

Action

Remove the four outer screws (2) and the two screws in the middle (3) from the axis body adapter plate (1).

Remove the axis body adapter plate.

Remove the toothed belt pulley with bearings (5) carefully from the axis body (4).

Preparing the Mounting of the Toothed Belt Pulley

Step	Action
1	Clean all parts.
2	Inspect all parts for damage.

NOTE: Polluted or damaged parts may cause run-out which has an adverse effect on the service life of the axis.

NOTICE

UNINTENDED EQUIPMENT OPERATION

oReplace any damaged parts immediately.

oClean all parts before assembly and use.

Failure to follow these instructions can result in equipment damage.

Mounting the Toothed Belt Pulley

Step	Action
1	Clean both bearing seats in the axis body and, if necessary, clean the axis body.
2	Insert the new toothed belt pulley (4) carefully into the axis body adapter plate (2).
3	Fasten the deflection pulleys (3) to the axis body adapter plate with the two screws (1) in the middle. Use a low tightening torque to allow the pulleys to move easily.
4	Mount the toothed belt and the axis body adapter plate.
5	Fasten the two deflection pulleys to the axis body adapter plate with the two screws in the middle. Use the standard tightening torque.
6	Mount the toothed belt tensioners.
7	If applicable, mount the shaft extension.

Step	Action
1	Clean both bearing seats in the axis body and, if necessary, clean the axis body.
2	Mount the toothed belt, the new toothed belt pulley and the axis body adapter plate.
3	If applicable, mount the shaft extension.
4	Mount the toothed belt tensioners.
5	If applicable, mount the motor and/or gearbox.