General Parameters - Roland R4000 Manual

B0059001 / Rev. 2.3
7.11

General parameters

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9
from software version 1.15
ROLAND ELECTRONIC GmbH · Otto-Maurer-Str. 17 · DE 75210 Keltern · Phone +49 (0)7236-9392-0 · Fax +49 (0)7236-9392-33
Weld Seam Detection System R4000 SND40
for Tubes, Cans and Drums
"Weld seam width"
3 %
1 - ...
"Samples per cm"
30
1 - 120
"Slippage"
3 %
0,1 - ...
"Filter type"
9
Flank extreme / SAF
-
"Rel. Magnet flux [%]"
100 %
0 - 100 %
"Settling time"
0 - 5000
"Signal gain"
20 (eddy current), 1
(leakage flux)
1 - 100
Manual
Signals, which are within the specified circumferential range (referred to
the determined weld seam position), will not be used for evaluating the
seam detection.
If weld seams are rather wide (e.g. at ERW-welded steel tubes with
diameter >50mm), then parts of the weld seam signal can (at standard
setting) be detected as interference signal. This effect can be avoided
by increasing the value.
With this value the max. positioning deviation is determined.
This value specifies the number of samples (scans) per centimetre of
material passing the sensor.
In order to reach a resolution of at least 1°, more than 360 samples must
be drawn during one turn of the tube. A proven value is at approx. 600
samples.
From this it can be easily calculated, which sample value is practicable
for a tube diameter.
Rough values:
Tube Ø Samples/cm
> 50 mm 30
> 100 mm 20
> 200 mm 10
< 500 mm 5
Determines the max. permissible slip rate (= variation of turn speed). If
the unit reports too large slip rates, the turn drive system should be
inspected first. If a larger slip rate must be accepted, the resulting worse
positioning accuracy must be considered.
In the SND40 the sensor signal becomes digitally filtered. The result
serves for seam detection and positioning.
Changing the value causes stronger / weaker magnetization of the
material being in front of the sensor.
When using the EC-...-sensors, this value should be 0%.
When using the NS9S and NS12S sensors, this value should be 100%.
When using combo sensors, changing the value can result in better
signal quality and requires adjustment of the parameter "Phase" on use
of the signal type "Y Component".
Time, which the magnetic field requires after being switched on for
building up the magnetic flux inside the material.
In most cases, a time of 1500 ms is sufficient.
Increases the signal amplitude, in order to obtain a better evaluation.
Operation
samples/circumference.
540
600
600
750
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