Festo EXCM-10, Repair Instructions

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4.1.4 Mounting the planar surface gantry
4.1.4.1 Cleaning and Greasing
– Clean and grease as described in Chapter 6 on page 48 .
4.1.4.2 Adjusting the guide backlash
The guide backlash only needs to be adjusted if the planar surface gantry has been distorted during the mounting
process. If it has been installed according to the specifications (see description of “Mechanical installation”), no
adjustments are necessary. Mounting a distorted planar surface gantry should be avoided where possible.
1. Move the slide to the right or left to the stop.
2. Loosen the locking screws
1
and unscrew them by approx. 3 turns.
3. Use the threaded pins 2 to set the guide to be backlash-free. Check the
displacement resistance. It must not exceed 9 N over the entire stroke.
4. Secure the setting by tightening the locking screws
1
with a tightening
torque of 0.2 Nm.
5. Check the displacement resistance again by moving the slide repeatedly.
1 2
1 2
4.1.4.3 Notes on the toothed belt
The toothed belt is ordered from the online spare parts catalogue using the appropriate part number (dependent on the
size and version of the planar surface gantry) (

www.festo.com/spareparts ).
The part number is a module number and is dependent on the size of the planar surface gantry. In addition to the part
number, you must also specify the stroke of your planar surface gantry when ordering. The information required is shown
in the product labelling on the planar surface gantry (see order example below). You can use this information to calculate
the necessary toothed belt length.
If it is necessary to change the toothed belt, always investigate the cause of the failure in order to prevent premature and
repeated failure. A planar surface gantry used as intended and designed correctly will not normally show any premature
signs of failure.
This investigation is not necessary in the case of non-premature failure (fatigue time). However, the condition of the
toothed belt pulley assembly (wear of the tooth surface/geometry, radial play of the bearing inner raceway with respect to
the bearing seat: when new, it should fit tightly) and also the condition of the deep-groove ball bearings (e.g. perceptible
bearing clearance, impaired roll-off behaviour and increased operating noise, etc.) should always be checked. In case of
uncertainty, we recommend replacing all the components mentioned to rule out reciprocal effects during later operation.
Possible visible signs of wear of the toothed belt:
– Cracks on the back of the toothed belt indicate wear, for example, due to operation outside the allowed temperature
range, impermissible chemical effects or possibly by reaching the end of the fatigue life.
– Wear of the nylon fabric (fabric cover) on the tooth side of the belt. This is indicated by lint formation and bobbling,
for example, and constitutes primary wear (abrasion of the fabric).