Bomar Ergonomic 320.250 DG, Operating Instructions Manual

Page: 46 / 115

46 Manual version: 1.02 / Mar. 2010
Manual rev.: 1
Údržba stroj
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Machine service
1. Release the nut of the stop screw and screw down the stop screw
2. Lower the arm to the lower stop and turn on the band driver
3. Screw out the stop screw until the band driver stops
4. Secure the screw with nut again and check the limit switch setting once more
4.5. Cooling agents and chips disposal
The quality of the cooling
agent will deteriorate due to:
If the solution is too weak: If the solution is too strong:
•
use of contaminated water
•
impurity
•
outside oil contamination
(hydraulics, gears)
•
high operating temperatures
•
lack of air circulation
•
wrong concentration
•
corrosion protection is
diminished
•
lubrication decreases
•
microbial attack is more likely
•
the cooling ability is decreased
•
foam behaviour increases
•
emulsions stability deteriorates
•
sticky residue develops
4.5.1. Coolant device inspection
The state of the cooling agent has significant influence on the cutting quality and on
the operational life of the machine. Lifetime of the cooling liquid is 1 year, after this time
we recommend change the cooling liquid. This time is dependent on the degree of
pollution cooling liquid (especially with oils) and on the other factors.
Check level of the cooling liquid and function of the pump periodically!
Check the state of the cooling agent according to the following table:
Testing Interval Method Condition Precaution
Liquid level
daily visually too low
after concentration check, refill
with water or emulsion
Concentration
daily
refractometer
densimeter too high
too low refill water
refill base emulsion
Smell
daily by sense of smell unpleasant smell
good ventilation, add biocides
or renew coolant
Contamination
daily by sense of smell
visible oil leaks,
sludge fungi
surface cleaning, fix leaks, add
biocides or fungicides, or
coolant renewal after added
system cleanser*
Corrosion-
protection
when
necessary
visually
chip test
Herbert-test
insufficient corrosion
protection
test stability, if necessary –
increase concentration or pH
value
Stability
when
necessary
refractometer oiling
add concentrate, enquiries to
supplier
Foam reaction
when
necessary
shaking test
too much foam, foam
disperses too slowly avoid aeration, increase water
hardness, ix with defoamer
* according to manufacturers’ instructions
4.5.2. Cooling liquid preparation¨
Prepare the mix of the water and cooling liquid. Conform the notes of the manufacturer
and keep manufacturer-approved concentration
All instructions are stated on the tank of the cooling liquid or in documents of the
cooling liquid. For cooling liquid using and liquidation reads date of cooling liquid
manufacturer, which it is necessary to keep
Fill the mix of water and cooling liquid to the tank of the cooling system. The capacity
of the tank for the cooling liquid is stated in chapter „
2.1
When filling tank with the cooling liquid take care that the liquid will not drip out of the
tank and the tank will not overflow
Note:
If the state of the cooling liquid is not satisfactory, the cooling
liquid must be changed.