Appendix; Checklist For Fault Identification - Roland R4000 Manual

B0059001 / Rev. 2.3
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Appendix

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Checklist for fault identification

Use the following checklist for identifying fault conditions.
Problem Classification
Problem detected
No operation / No start of tube turning
device
- Absolutely no weld seam detection
- No. of non-detected weld seams too high
- Wrong weld seam position with
permanently changing positioning
- No. of non-detected weld seams too high
- Wrong weld seam position with
permanently changing positioning
Problem detected
- No. of non-detected weld seams too high
- Wrong weld seam position with
permanently changing positioning
Wrong weld seam position with permanently
changing positioning
Wrong weld seam position with constant
offset
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
X Please tick appropriate description
No operation / No start of tube turning device
Absolutely no weld seam detection
No. of non-detected weld seams too high
Wrong weld seam position with constant offset
Wrong weld seam position with permanently changing
positioning
This problem occurs in _______ cases
of _______ processed tubes/coils/drums
# Possible Reason
1 Error found in SND40, see error message displayed,
see manual for further information
2 Attached PLC does not function correctly
3 Cabling to PLC interrupted / disturbed
4 Problem of drive
5 Active Program does not match to the tube / coil to be
detected.
6 Active Program has been modified with parameters not
fitting to this tube
7 Velocity or rotational speed differs from the settings in
the program. Check this with function "Speed
Measurement"
8 Velocity or rotational speed is not constant due to:
- problems with drive control,
- bad transmission of power from drive to tube,
- reduced friction due to oil or dirt
9 Too strong or too weak pressing force of sensor onto
tube, e.g. due to incorrect pressure of air cylinder
10 Not all rollers at sensor tip touch the tube due to:
- incorrect mounting of sensor
- Insufficient elasticity in sensor mounting (rubber
mounts not used ?)
11 Accumulation of dust and dirt (e.g. metal particles) at
sensor tip. Clean sensor regularly according to
operating conditions. (Check at least every week)
# Possible Reason
12 Cabling problems:
- Plugs loose
- Bad grounding
- Cable to close to high current cables or other
equipment emitting electrical noise
13 Wear of ball bearings or pole shoes (see manual)
14 Tubes from a different charge or another manufacturer
with different tube forming quality or different weld seam
quality.
15 Drive without brake or with brake function switched off.
16 Check program parameter "Position Offset"
Manual
Appendix
Checked
Checked
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