Festo 8024918, Repair Instructions

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20 / 54 Festo 7ELGA-BS-KFa_en
4 Repair steps
Where possible, it is advisable to dismantle the spindle axis from the system entirely before carrying out the repair.
Before starting the repair, dismantle any attachment components in accordance with the instructions in the
corresponding operating instructions.
Keep your working environment clean and tidy.
Before dismantling the spindle axis the cause of the failure must be investigated to prevent repeated and premature
failure. A spindle axis that has been used as intended will not normally show any signs of premature failure.
This investigation is not necessary in the case of non-premature failure (fatigue time). However, the condition of the
spindle axis (general condition, etc.) must always be checked.
In case of uncertainty, we recommend replacing all the components mentioned to rule out reciprocal effects during later
operation.
In the event of premature failure of the spindle axis the operating conditions should be examined more closely.
The following possibilities should be considered, among other things:
– Overloading
• In case of overloading, the application parameters (load, speed) should be adjusted accordingly.
– Ambient conditions/material resistance
• Check whether the ambient temperature is within the permissible range.
• Check the chemical and physical ambient conditions for harmful substances, such as dust, abrasive particles,
cooling lubricants, solvents, ozone, radiation, water-soluble substances, greases and oils, etc.
Note
The repair should preferably be carried out on a stable and flat work surface with storage for small parts.
To prevent damage to the roller track and other components, do not use pointed or sharp-edged assembly tools.
Depending on the model, the attachment position of the motor for the ELGA-BS-KF spindle axis can either be on the
left or the right-hand side.
The repair steps in these repair instructions only consider the left-hand motor attachment position.
The ELGA-BS-KF-…-MR spindle axis (right-hand motor mounting) differs from the ELGA-BS-KF-…-ML spindle axis (left-
hand motor mounting) only in that, for the right-hand motor attachment position, the bearing block is on the right and
the bearing cap is on the left and the corresponding spindle assembly MR (right-hand motor mounting) is installed.
4.1 Preparatory steps
Danger
Risk of fatal injury from electric shock.
The control of the drive motors is still charged after the voltage has been switched off (capacitor voltage). As such, you
must wait approx. 3 minutes after switching off the voltage before the motor cables can be removed. The capacitors
discharge their voltage during this time.
1. Disconnect the spindle axis from the power supply and secure it from being switched on again accidentally.
2. Remove the motor and encoder cables.
3. Dismantle the motor, axial kit or parallel kit.