Application Selection; Traverse Anti-Phase; Basic Concept; Limitations - YASKAWA A1000 Manual

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Application Selection

Traverse Anti-Phase

Overview
The Traverse Anti-Phase function controls the traverse arm of a winder in textile industry applications. This function
generates a dithered disturbed waveform that is used as frequency reference for the traverse arm drive and also provides
an anti-phase signal for output to a spindle slave drive for better winding.

Basic Concept

When the drive reaches the set frequency reference, the output frequency waveform is modulated in a triangle type
pattern. This randomizes fiber overlap on the spindle, producing a tighter wrap and a higher quality wound package.
P1 parameters are used to set the attributes of a disturbed waveform, which is essentially a triangle wave with
instantaneous jumps at the peak and trough. This triangle wave rides on top of the base frequency reference for the
traverse drive.
The signal(s) output to control the slave spindle drive can be set to one of three new monitors:
• U7-02 - Absolute Slave Frequency
• U7-03 - Ripple Slave Frequency
• U7-04 - Slave Base Frequency
The Absolute and Ripple Slave Frequency monitors have an anti-phase component to them, outputting a disturbed
waveform that is the inverse (anti-phase) of the master disturbed waveform. The anti-phase waveform ignores the jump
portion of the master traverse disturbed waveform.

Limitations

• The following languages are supported: English, Japanese, Spanish, German, French, Italian, and Portuguese.
• Parameter L4-02, Speed Agree Detection Width, should be set to a small, nonzero value to avoid unintended jumps in
the disturbed waveforms.
• When P1-04 and P1-05 are set to short slope times, set L4-02 to a value greater than 0.5 Hz to prevent inconsistent
traverse operation.
• Step changes in frequency reference will result in unintended jumps in the disturbed waveforms. Disable the Traverse
function using the 80h (Disturbed WF Off) digital input to prevent damage to the motor or connected equipment.
• The Traverse waveform can be configured to be smaller than the input resolution of the A1000 slave drive's frequency
reference. Ensure that Master Frequency Reference × P1-02 is significantly larger than (Slave Max Output Freq/2048)
for proper control of the slave drive.
YASKAWA TM.A1000SW.029 Traverse Application A1000 Custom Software Supplement
3 Application Selection
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