Retsch PM 400 - Manual (Page 18)

08.02.2012 Retsch GmbH
18
Doc. Nr. GB 98.535.9999
Power failure during milling
If the mains supply fails during the milling process the milling
operation is interrupted. All parameters are retained and the
residual running time is stored. After switching on the
machine again the instructions shown on the left appear in
the display (display 1).
You can continue the process by pressing the START button.
Through automatic storage of the residual running time the
milling process is continued up to the end of the originally set
milling period.
For safety reasons the PM400 must be opened and the milling
chamber checked. After closing the lid milling is continued
automatically (display 2).
By pressing the STOP button the process is stopped.
Suitable milling cups in the PM400
The PM400 is suitable only for milling cups f rom the firm
Retsch GmbH, of type “Comfort”, with a nominal volume of 12
ml – 500 ml.
These are available in the following materials:
Agate
Sintered corundum
Zirconium oxide
Stainless steel
Special steel
Tungsten carbide
The „Comfort“ milling cup range has been developed specially
for extreme test conditions, such as long-term trials, high
mechanical loading and maximum rotary speeds – and also
for mechanical alloying.
Milling cup filling level
Guide values for material quantity and balls
Nominal
volume
Useful
volume
Max.
charging grain
size
Recommended ball filling
dia. 10mm dia. 20mm dia. 30mm dia. 40mm
12 ml - 5 ml 1 mm 5 balls - - -
25 ml - 10 ml 1 mm 8 balls - - -
50 ml 5 – 20 ml 3 mm 10 balls 3 balls - -
80 ml 10 – 35 ml 4 mm 25 balls 5 balls - -
125 ml 15 – 50 ml 4 mm 30 balls 7 balls - -
250 ml 25 – 120 ml 6 mm 50 balls 15 balls 6 balls -
500 ml 75 – 220 ml 10 mm 100 balls 25 balls 8 balls 4 balls
If the filling level of the milling cup is too high or too low the
milling result will be impaired and damage (wear increase) to
the milling equipment can result.
PROCESS INTERRUPTED
POWER FAILURE
STOP = DISCONTINUE
START = CONTINUE
START = FORTFAHREN
1. OPEN MACHINE
2. CHECK MILLING
CHAMBER
3. CLOSE MACHINE
ASCHINE SCHLIESSEN
Display 1
Display 2