Film, Sheet and Paper Thickness Profile
SCAN_LASER 2010 – Micrometer Over Roller
Click here to download the data sheet.
SCAN_LASER 2010 provides on-line measurement of:
- Thickness / Gauge / Caliper Profile
- Cross and machine direction profiles
- Width
- Temperature profile (optional)
- Other process parameters such as line speed and plant status
The system can also provide feedback control for dies / haul off / calendar rolls / coating blades.
Materials Measured:
Scan_Laser 2010 can be used to measure any flexible material as it travels over a roller. Typical materials include:
| Coated fabric | Plastic sheet and films | Paper sheet - all grades |
| Non woven fabrics | Extruded glue | Rubber sheet |
| Packing materials | Extruded sealant | Safety flooring |
| Tape products | Foam sheet | Laminates |
Measurement Principle:
Dual-Sensor systems with eddy current and laser thru-beam: the eddy current sensor supplies a reference signal with respect to the roller which goes into the calculation of the actual thickness signal from the laser micrometer.
The systems use the principle of 'laser thru-beam' to measure the thickness of the material as it travels over the roller. This technique is independent of surface finish and can therefore be used for any type of material from clear films through to fabrics.
The thickness profile is provided by scanning the micrometer across the entire width of the product. An infra red sensor can also be added to the head for temperature profile measurement.
The thickness is measured relative to the roller. There are two measurement head options:
- SL2500
- Micrometer only: For applications that require an accuracy no greater than 20 microns, the use of an accurate roll (TIR Better than 10 microns) combined with a reference scan of the roller is the proposed solution.
- SL2600E
- Combined micrometer and eddy sensor: See panel for description of operation.
This technique can be used for measurement resolution of <1 micron and
is therefore used for films and other very thin material.
Measurement Technical Data:
SCAN_LASER 2010 is supplied with one of two measurement heads.
| SL2500 – Micrometer Only | |
|---|---|
| Range | Up to 30mm |
| Accuracy | Better than 20 microns |
| Resolution | Better than 2 microns |
| Frequency | 2.3Khz |
| Material | Independent |
| Temperature | Option to add infra red sensor |
| Width | Option via encoder |
| SL2600E – Micrometer and Eddy Sensor | |
|---|---|
| Range | Up to 10mm |
| Accuracy | Better than 5 microns |
| Resolution | Better than 1 microns |
| Frequency | 2.3Khz |
| Material | Must be insulator |
| Temperature | Option to add infra red sensor |
| Width | Option via encoder |
Sensor Head and Installation:
The
measurement head is mounted on a linear guide that is controlled via either a
stepper motor or AC motor depending on the application.
In normal operation the head scans back and forth across the material and
provides a thickness profile. There is an option for the head to remain stationary
for a period of time and measure the thickness at a single location as the
material moves down the production line. This enables the investigation of
effects along the length of the product.
The system can be installed on either an existing roller – if there
is sufficient clearance as the material passes over the roller – or
on a new dedicated roller.
Software and Systems:
SCAN_LASER is based on standard PCs with a touch screen and traffic light
annunciators. The software is configurable for the different types of measurement
and control. A typical user interface screen is shown below.
SCAN_LASER software provides:
- Real-time profile displays
- Traffic light annunciation for alarms including warnings prior to full alarms
- Database covering measurement tolerances for each product – for fast configuration when the product changes
- Logging across batch / shift / day as required
- SPC Charts
- Standard control algorithms