A precise design for an attractive price
The MO1 series closed frames are designed for lines where the measured product width ranges from 4500 to 6650mm.
Five frame sizes are available. The following table depicts the measurable width for each model and type of sensor:
|Type of frame||XTiLE (X-rays)||LTD/LTD (Laser)||IR4 or IR6 (Infra Red)||BTi, PM147, KR85, Sr90 (Radioactive Source)|
|MO1 - 4500||4550||4500||4650||4600|
|MO1 - 5000||5050||5000||5150||5100|
|MO1 - 5500||5550||5500||5650||5600|
|MO1 - 6000||6050||6000||6150||6100|
|MO1 - 6500||6150||6500||6650||6600|
The gap, which is the distance between the two sensor heads, can be adjusted from 10 to 180 mm. The adjustment depends on the type of sensor, application,
thickness of the material to be measured, and safety considerations.
This frame is suitable for measured product whose pass angle with the horizontal is between 0° and 45°.
The standard product pass line (distance from the floor at which the product passes) is between 980 and 1000mm, and can be reduced to 900 mm if required. For higher pass line levels the scanner is mounted on adapted legs.
The frame is manufactured with 6 mm thick steel tubes of 250 x 150 mm rectangular cross section for the horizontal beams. The frame uprights are made with 150x40mm thick steel sheet. Compared to other steel profiles, the tubular structure is by far the strongest both in bending and torsion. This design provides the frame an excellent mechanical stability while optimizing space.
During final assembly, the complete guiding system is attached to surfaces directly machined on the already fully welded and assembled frame. This manufacturing method ensures that head alignment is perfect in all axes and no adjusting or leveling system is necessary. An alignment deviation of less than 0,2mm is achieved in all motion axes throughout the frame.
This solution avoids the on-site difficult and extremely time consuming alignment maintenance operations.
The operator side of the scanner is no wider than the frame upright (150x40mm). This small side profile minimizes obstructions for the line operators and hence facilitates easy and safe threading of the product through the scanner.
The pass line level includes mounting plates which are fixed on the operator side and mobile on the electrical cabinet side. On the mobile side, the mounting plate consists of two steel plates, one attached to the line structure and the other attached to the frame; they are linked together by roll bearings. The frame is then free to thermally expand or contract, thereby preventing possible mechanical deformations.
Anti vibration plates are also installed between the frame fixing plates and the mounting plates.
Measurement Sensor Head Guidance
The measurement head guiding system consists of two carriages equipped with linear ball bearings running on hardened chrome rails (HRC 62). The assembly, statically over determined, is extremely stable. The sensor heads are mounted on these carriages.
The carriages are pulled by timing polyurethane belts reinforced with steel cables. The belt tensioning system can be easily disassembled from the carriages.
The belts are supported throughout the frame. Therefore, the belt tension can be adjusted optimally, avoiding vibration and premature wear, thereby increases the equipment reliability.
The upper and lower belts are coupled directly via a single shaft which transmits the motion. This assembly is extremely simple and is very reliable.
The belt fastening system on the carriages can easily be disassembled. It allows decoupling the heads easily and quickly for maintenance operations (for example to clean the sensor heads or to replace the sensor windows). Re-coupling the head is very simple. No alignment operation is necessary since a mechanical device automatically determines the relative sensor positions.
Covering / Protection of the guiding and the drive systems
Except for the area of passage of the sensor supports, the scanner is completely closed by covers hence protecting the guiding system from dust and fibers. The covers are designed to be easily and very quickly removed. Optionally they can be made of aluminum in order to reduce their weight and facilitate handling.
For very harsh environments, the area of passage of the sensor supports can be completely closed and the scanner can be operated with a higher internal positive pressure to further reduce internal contamination risks.
Reliability and ease of maintenance were closely studied in order to minimize machine down time. All maintenance operations are designed to be very easy and fast.
- Lubrication of linear bearings: It's done with a standard grease gun with no need to remove the covers.
- Measurement head uncoupling: Again there is no need to remove covers for this operation. A hatch gives the access to the coupling system.
- Head re-coupling: A mechanical system quickly resets the optimal head alignments without any type of specialized time consuming procedure.
- Lubrication of pulleys: It can be done easily by removing only one cover fastened without screws.
- Access to the motor and drive shaft: Again there is only one cover to remove (fastened without screws).
All electrical components of the scanner are assembled in a cabinet mounted to the drive side of the frame. Scantech scanners are complete stand-alone machines that can be installed and set up much faster than conventional gauge systems with remote electrical cabinets that require additional wiring, testing, and interconnections troubleshooting.