00198521-01_UM_LDU_E_EN.pdf - 第52页
4 Operation 4.14 Checking the layer thickness 52 User Manual SIPLACE Linear Dipping Unit E 12/2018 4.14 Checking the layer thickness There are numerous measuring devices for paintshops and coating specialists on the mark…
4 Operation
4.13 Logging off and removal
User Manual SIPLACE Linear Dipping Unit E 12/2018 51
4.13 Logging off and removal
The LDU E will be logged off, unlocked and removed from the placement machine like any E-
feeder module.
CAUTION
Danger of tilting or falling down
The LDUE can tilt or fall down when handled incorrectly during removal from the
changeover table.
► When removing the LDUE hold it with both hands: take the gripper with one hand and
support the housing with the other hand (see chapter 4.2 "Handling" [}39]).
► Pull out the unlocking lever until you hear a
clicking sound.
► Carefully pull the LDU E backwards by the
handle.
► Remove the LDU E with both hands from
the changeover table.
4 Operation
4.14 Checking the layer thickness
52 User Manual SIPLACE Linear Dipping Unit E 12/2018
4.14 Checking the layer thickness
There are numerous measuring devices for paintshops and coating specialists on the market,
which are used to measure the layer thicknesses of paints, varnishes, pastes etc.
(wet film thickness measurement gauge). Two common means of measuring are explained below.
One of the main advantages of these instruments is their ease of use. Precise measurements are
achieved quickly in the production environment.
4.14.1 Layer thickness measurement "comb"
Structure of measuring device
On one side of the rectangular measuring instrument there are engraved teeth with increasing spa-
cing from the contact surface. A scale is marked above the teeth and the engraved numbers indic-
ate the distance from the contact surface in µm. These measuring devices are usually made of
steel so that they can be cleaned with solvents.
Measurement principle
The measuring device is dipped into the layer of flux. The point at which the flux touches a tooth is
the layer thickness measurement (arrow in right-hand image).
Performing the measurement
► Place the measuring device onto the flux surface as shown above and press down to the base
of the cavity.
► Perform a brief "combing" movement while applying moderate pressure.
► Take the measuring device vertically up and out of the flux.
► Determine the shortest tooth which is coated by flux.
► Read the value on the scale at this point.
4 Operation
4.14 Checking the layer thickness
User Manual SIPLACE Linear Dipping Unit E 12/2018 53
4.14.2 Layer thickness measurement "roller"
Structure of measuring device
The measuring device consists of a rotating handle and three rollers. The innermost roller has a
small diameter and runs eccentrically to the other two outer rollers. A scale is marked on the out-
side. These measuring devices are usually made of stainless steel so that they can be cleaned with
solvents.
Measurement principle
The measuring device is rolled through the layer of flux. The two outer rollers moved on the base of
the cavity. The eccentrically aligned middle roller is rotated and guided towards the surface of the
flux. The point at which the flux touches this middle roller is the layer thickness measurement.