HEIDENHAIN VT 121 Operating Instructions Manual page 46

6.3 Cleaning
NOTICE
Cleaning with sharp-edged objects or aggressive
cleaning agents
Improper cleaning will cause damage to the product.
Never use abrasive or aggressive cleaners, and never
use strong detergents or solvents
Do not use sharp-edged objects to remove persistent
contamination
Cleaning the cover glasses
HEIDENHAIN recommends daily cleaning of the cover
glasses. After completing machining, clean the cover
glasses so as to prevent fluids from drying on them.
NOTICE
Scratching of cover glasses by metal chips
Incorrect cleaning may damage the cover glasses.
Before manual cleaning, remove visible metal chips
with jets of compressed air. You need to wear safety
goggles for this.
Apply light pressure to clean the cover glasses
Clean the cover glasses with a damp, soft, and clean
cloth
You can use a clean cooling lubricant or standard
window cleaner as a cleaner
46
6.4 Replacement parts
You can order the following replacement parts for product
maintenance:
Designation
Cover glass
6.5 Replacing the cover glasses
Required materials:
Face spanner (3 mm)
Replacement cover glass insert
O-ring
Replace the cover glasses only in a dry and
clean environment outside the machine's
working space.
Use the face spanner to loosen the cover glass insert
Remove the cover glass insert
Remove the O-ring
Carefully remove any contamination from the
installation space
Insert the new O-ring
Insert the new cover glass insert
Use the face spanner to screw in the cover glass insert
so that is is fully engaged
HEIDENHAIN | VT 121 | Operating Instructions | 03/2022
ID
1321963-01