Novexx Solutions ALX 92x, Service Manual, Page: 45 / 824

07/15 Rev. 0 SERVICE MANUAL Installing APSF
ALX 92x
19
Entering the rotary encoder type
Depending on the features of rotary encoder and label dispenser, there are different
ways to count the impulses generated by the rotary encoder:
1. Call DISPENSER PARA > Encoder Type .
2. Enter the type of measuring wheel which is mounted on the rotary encoder shaft
(further details see below)
Single-phase operation
Only one phase of the encoder signal (signal A) is utilized.
Advantage:
Less expense (as with double-phase)
Disadvantages:
• Lower resolution (as with double-phase)
• If the conveyor is standing still, vibrations can produce „faulty“ signals, which the
labeller cannot distinguish from „real“ signals.
Double-phase normal
operation
Many rotary encoder produce a second signal (signal B), which is out of phase by 90°.
Using this signal can overcome the restrictions of single-phase operation.
Advantages:
• Detection of the rotational direction, even when standing still
• Double resolution
Disadvantages:
• Higher expenses (the sensor must be able to produce signal B, the labeller must
be able to utilize it)
• The rotational direction must be configured
Double-phase inverted
operation
If the phase relationship (leading or trailing) between the sensor signals A and B
doesn´t match the counting direction of the labeller, the labeller calculates nonsense
speed values. The following measures correct this problem:
• Operating the rotary encoder in opposite direction (e. g. by mounting it on the op-
posite side of the conveyor), or
• Changing the cables, that is exchanging A and B, or
• Connecting the inverse signal /B instead of B, or
• Configuring the inversion of signal B at the labeller:
 Set DISPENSER PARA > Encoder Type to „2 Phases invert.“
Input of encoder data
Example: Entering the values for the recommended rotary encoder
Setting resolution:
 Set DISPENSER PARA > Encoder Resol. to “500 Pulses/Turn”.
Setting measuring wheel diameter:
 Set
DISPENSER PARA > Encoder Diameter
to "63.7 mm".
Switching on speed adaption:
 Set DISPENSER PARA > Speed Adaption to "On".