Trouble-Shooting; Electrolyte; Flow; Pencil And Cathode - Struers Movipol-3 Mode D'emploi

Electrolyte

Flow

Pencil and Cathode

Polishing Chamber

Power Supply

18
Movipol-3
Instruction Manual

2. Trouble-shooting

The Figures referred to in this manual can be found
in the Spare Parts and Diagrams section.
Polishing defects can normally be corrected using the following
trouble-shooting schedule:
 Check the age of the mixed electrolyte. It should not be more
than 2-3 months old. The A-2 electrolyte has a particularly short
lifetime (approximately 2 months) in a mixed condition.
 Check the number of polishings made with the electrolyte. It
should not be used for several hundred polishings.
 Check that the right electrolyte - material combination is used.
 The pump suction is adjusted to 300 "20 mmhg at the factory
(some materials, such as Nimonic and Titanium alloys need a
flow corresponding to 400-450 mmhg). The suction should be
measured with a vacuum meter using the suction hose nipple
(fig. 7.3).
 Check that all connections are tight and that air is not sucked
into the stream of electrolyte.
 The pump suction (flow) can be adjusted by means of the screw
(fig. 7.2). Screw inward increases the flow. Screw outward
decreases the flow.
 Check that the cathode (fig. 9.100) is even with, or retracted
approximately 0.5 mm from the edge of the pencil tip without
polishing chamber.
 Check that the preset voltage can be established between the
cathode and the specimen (the anode).
 The resistance can be very high in an electrolyte which is
incorrectly mixed.
 Check that the polishing chamber is properly mounted and still
flexible. If not flexible, exchange the chamber; see section
INSTALLATION.
 Check that the batteries are charged.
 Check that the transformer voltage is 42V "10%.
Note: