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 Welcome to RollAlignment.co.uk from Monition Ltd
Roll Alignment Applications
The Fixturlaser Roll 200 is a precision instrument suited particularly for complex alignment tasks within the paper industry.
Forming Section - Forming Table and Head Box
 Forming Table
In this section, parallelism between the breast roll and the drive rolls is important, or the drift and wear of the wire will be effected. The surface of the paper sheet is effected if the dandy roll is not parallel to the forming table. The pick up roll and the couch roll may cause breakages and wrinkles if they are not kept parallel, and the suction process may be effected. The levellling of the forming table is another important factor in this section, that will especially effect the de-watering process and the deterioration of the foils.
Benefits:
• Efficient de-watering process and uniform fibre structure will improve the paper quality
• Increased de-watering capability gives possibility to
increase production speed
• Increased lifetime of the wire
• Reduced energy consumption for the vacuum pumps
Measurements:
• Flatness measurement and levelling of the forming table
• Parallelism of drive rolls
• Parallelism of forming rolls
 By using a laser measurement system, requirements are met on both accuracy and repeatability. Adjustments can be made at each point with live values and the results are stored for filing and traceability.
 The forming table flatness is essential to the effectiveness in the de-watering process. Differences in the distance between wire and forming table has a direct impact on the paper quality.
Head Box
 It is important that the breast roll is parallel to the apron board. If the air gap differs, it will cause problems with the consistency of the paper. It is also important that the apron board is straight and the slice gap is correct in order to get a uniform output of paper pulp on to the forming table.
Benefits:
• Uniform paper structure and thickness
• Reduced rate of scrap paper
• Increased efficiency in the dewatering process and possibility to increase production speed
• Reduced risk of breaking the slice tip
Measurements:
• Straightness measurement on apron board
• Parallelism between apron board lip and breast roll
Press and Dryer Section
Press Section
The parallelism of the rolls, both vertically and horizontally, may effect the drift and wear of the felt, the drying capacity of the paper and may cause breakages in the paper. Especially parallelism in the press nip is important or the pressure will be uneven causing problems with the de-watering process.
Benefits:
• Less scrap due to uniform fibre structure
• More output due to the possibility to increase production speed
• Increased time between replacement of wire gives less downtime
• Less energy consumption due to efficient de-watering
Measurements:
• Horizontal and vertical parallelity of rolls
Dryer Section
In this section, the problems are similar to the press sections, although we would like to point out the problem with wrinkles and breakages in the paper sheets. The amount of rolls in the web path is large in the dryer section and increases the importance of roll parallelism.
Benefits:
• Increased uptime
• Increased time between felt changes
• Reduced scrap production
• Increased product quality
• Possibility to increase production speed
Measurements:
• Horizontal and vertical parallelism of rolls
• Straightness of doctor blades
Finishing Calenders and Winders
 Finishing Calenders
The parallelism is important in the calender, both vertically and horizontally, or the roll nip will differ over the roll length. In some calenders, there is a nip offset that has to be considered.
Benefits:
• Uniform gloss
• Reduced scrap production
• Increased time between roll replacement
• Possibility to increase production speed
Measurements:
• Horizontal and vertical parallelism of rolls
• Set calender nip offset
Winders
Poor parallelism between the calender rolls, the reel drum and spool may create problems with a high rate of scrap paper as a result. Also the paper may drift sideways during the reeling, creating problems with wrinkles and difficulties when cutting the paper.
 Benefits:
• Less scrap paper
• Increased production capacity
Measurements:
• Horizontal and vertical roll parallelism
Monition Ltd - Fixturlaser UK is the distributor for Fixturlaser Laser Alignment Measurement systems here in the UK. We can provide support, spares, repairs, calibration and onsite service work for Roll Alignment Applications, and the Fixturlaser Roll 200 Alignment System and equipment. For additional information, please telephone Monition on 01909 722000. Alternatively you can email us with your requirements at sales@monition.com.
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