Reference feature
Confirm whether the controller is intended to follow a left edge, right edge, centre position or an approved line feature before judging a sensor reading.[2]
Resources / Web Guiding Troubleshooting
Web Guiding System Troubleshooting Guide
A useful troubleshooting record separates the observed symptom from its possible causes. Start by identifying the web reference, sensor signal, controller state and guide-frame response, then compare the evidence with the documentation for the installed components.
Web-guide diagnostics
Trace the signal, reference and guide response
Use an evidence-led diagnostic sequence before changing settings or replacing components.
1. Map the guiding loop before diagnosing the symptom
A web guide uses a material sensor, a controller and an actuator or guide mechanism to correct lateral position. The diagnostic record should identify which of those stages is producing the unexpected observation before a component is replaced.[1]
- Describe the symptom in operating terms: edge outside the sensing area, no frame movement, movement in an unexpected direction, slow correction, or repeated movement around the reference.
- Record the material, reference feature, line condition, active control mode, sensor position and guide-frame position when the symptom occurs.
- Keep photographs, wiring identifiers and the installed model and manual revision with the record so the test can be repeated on the real machine.
2. Check the sensor and reference condition first
The cited BKS015 manual lists an edge outside the detection band as a condition to check by aligning the sensor to the web edge and reviewing the reference-position adjustment. These actions apply to that documented system; use the manual for the installed sensor and controller before transferring them to another machine.[2]
For the same documented system, a guide that immediately moves the web edge out of the sensing area can be associated with sensor side or connector assignment. The manual identifies left/right orientation from the running-web direction and names the corresponding sensor-side checks.[2]
Detection position
Compare the observed web edge with the documented sensing area and verify that the sensor is physically positioned for the intended reference.[2]
Connection identity
Trace the sensor plug and wiring label to the controller input shown for the installed system rather than relying on an assumed left/right convention.[2]
3. Observe controller and guide-frame response separately
For the cited BKS015 system, the controller compares position feedback with its reference and adjusts the steering frame when the difference exceeds the stored dead-band value. Its documentation separately describes reference position, dead band, gain and maximum correction-speed parameters.[2]
Record the controller indication and the mechanical response as separate observations. If the frame does not move, the cited troubleshooting table begins with sensor connection, cable continuity, wiring and power-supply checks before escalating a suspected component fault.[2]
Do not treat a generic gain or speed adjustment as a universal correction. Preserve the original values, confirm the installed controller documentation and use the machine's approved commissioning process before altering a setting.
4. Confirm direction, limits and the escalation record
The cited BKS015 manual documents a drive-direction setting for standard or inverse motor orientation and documents travel limits for its actuator position system. This confirms why the actual mechanical orientation and configured direction must be reviewed together on that system.[2]
- Capture the observed direction from a controlled, documented test and compare it with the installed equipment manual and wiring diagram.
- Record any limit, obstruction or abnormal end-position observation as a mechanical condition for review rather than changing unrelated software settings.[2]
- Escalate with the symptom record, photos, controller model, sensor model, wiring identifiers, active settings and web-path drawing when the documented checks do not explain the result.
Sources & References
- FMS Technology. FAQ – Frequently Asked Questions Back
- FMS Force Measuring Systems AG. Operating Manual BKS015 Steering Frame with Integrated Digital Controller for Web Guiding Back
FAQ
What should be checked first when a web guide is unstable?
Start by recording the actual symptom, material, reference feature, sensor position, control mode and guide-frame response. Then compare each observation with the documentation for the installed sensor, controller and guide mechanism rather than changing settings blindly.
Why can a web edge move outside the sensor range?
For the cited BKS015 system, the troubleshooting table identifies an edge outside the detection band and points to sensor alignment and reference-position review. Confirm the equivalent procedure in the documentation for the installed equipment.
What can cause a web guide to move in the wrong direction?
The cited BKS015 documentation links guide orientation to sensor side, connector assignment and a documented drive-direction setting. Verify the machine orientation, wiring and controller configuration as one controlled review.
When should a web-guiding issue be escalated?
Escalate when the documented checks do not explain the observed response. Include the installed models, symptom record, photos, wiring identifiers, active settings and web-path drawing so the condition can be reviewed without guessing.
Request a web-guide diagnostic review
Share the symptom, web material, sensor and controller models, photos of the guide frame, wiring identifiers, operating condition and web-path drawing. KRD can help scope the next technical review.