Manual
Weld Seam Detection System R4000 SND40
for Tubes, Cans and Drums
System description
B0059001 / Rev. 2.3
18
ROLAND ELECTRONIC GmbH · Otto-Maurer-Str. 17 · DE 75210 Keltern · Phone +49 (0)7236-9392-0 · Fax +49 (0)7236-9392-33
The following table shows how the number of
discarded tubes
and the number of
wrong positioned tubes
are influenced by the tube class and the chosen sort-out-threshold:
Risk of critical detection
1)
Risk of wrong positioning
2)
Good detectable
Bad detectable
Good detectable
Bad detectable
Ultra
Good
Satisfactory
1) Possibility that the position of the weld seam can not be detected with sufficient certainty. With
the signal "reduced detection capability" the discarding starts.
2) Possibility that a tube is stopped at wrong position.
*
Tubes with a high dB-value are „good detectable“, tubes with a low dB-value are
„bad detectable“.
Note
Please also refer to chapter 2.7 „Measures for improvement of
Weld Seam Detection“
Pos: 15 /Schweissnaht/ Geräte/ SND40/3 System beschreibung/Rundkörpe r/Wichtige Hinweise @ 1\mod_1225107989937_501.docx @ 7683 @ 24333332323 @ 1
2.4
Important notes for machine manufacturers
•
The following components have decisive influence on the function of the system:
•
the rotation device for the tube
•
Bending mandrels within the tube
•
the positioning device for the sensor
•
the clamping device for the tube
•
the unloader device for the tube
•
2.4.1.1 Rotation device and drive
The main requirements are:
•
stable tube holder
•
slip-free drive of the tube
•
constant rotation speed on the tube
•
low starting time of the drive
•
stopping behaviour of the drive or the constant brake
A stable tube holder means a device that takes the tube reproducibility and allows a smooth
multiple rotation of the tube.
Here, the weld seam sensor should not be carrying part of this device. Often, the tube drive is
designed so that it forms the tube receptacle.
Sorting-out
threshold
Tube class*
