Post processor axis use strategies (ID 04,14,24)
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Introduction
The post process menu can have many possible options for different axis use strategies, these have names such as 4 Axis A-X-Y-B (04). The axis names AXY etc are based on the standard axis naming so may not match with what the configured names are for the winder being used. Axis naming and axis systems are discussed in the topic Introduction to Post Processing. The (04) is a unique ID number for each option and is helpful to avoid ambiguity and verbosity when discussing various options with similar names.
4 axis Post-processor ID's 04,14,24
4 axis (ID=04 - mandrel, carriage, cross carriage, eye roll) is a very common standard configuration. In each of this options the output id very similar, the carriage and cross feed are used to position the payout eye however the rotating eye (AX-2) is calculated in different ways for these three options. Reading the topic on twist, shear and wrap might be helpful in understanding this topic. With the standard (classic) 4 axis post-process (ID=04) the eye-roll axis is calculated to prevent the fibres shearing across (falling off!) a payout roller, but there will be some twist of the band between the roller and the mandrel. If there is no fibre guiding near the output such as guide eyes or a comb then it is necessary to use this model to keep the fibres central on the out roller. Band twisting can lead to some narrowing of the band particularly near dome end for low angle vessel winds.
4 axis No twist (ID=14 - mandrel, carriage, cross carriage, eye roll). In this strategy is the same as ID=04 but the eye roll axis is calculated to try to minimise and twist and the fibres between. In doing so there may be considerable shear of the fibres across the roller so if there are no guides in the system the fibres may fall off the roller.
4 axis Hybrid (ID=24 - mandrel, carriage, cross carriage, eye roll). In this strategy is the same as ID=04 but the eye roll axis is calculated in to different ways that standard method is like ID 04 to minimise shear however if the slope of the mandrel is large, like in the region of the end of a dome then it changes and tries to minimise twist as in ID14. This is possible because in the dome ends the angle us usually very high (near 90 degrees) so the shear angle across the roller is small anyway, so the fibres will not fall off the mandrel. The user will be asked for Hybrid eyeroll trigger angle 50-90 deg.' so if a value of 60 degrees is set then all points where the mandrel slope if more than 60 degrees will use the low twist mode.
4 Axis (With Yaw) A-X-Y-C (ID 10)
This option is not often used but the Yaw axis aligns with the fibre direction to eliminate shear. This option is sometimes used winding elbows. You will still get the possibility of twist between the payout eye and the a mandrel. If the machine has both roll and yaw axes then it will often be better to use one of the 5 axis (ID's 03 and 13) or 6 axis options ( Id's 06, 07 or 16).
Follow this link to read about 5 axis strategies
Follow this link to read about 6 axis strategies