Service manual

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ENCODER SETUP

1. Select “ENCODER SETUP” at the product setup menu.

NOTE: This area is password protected. The password is 1800. Going back to the home

screen will disable the last password entry.

2. Turn the encoder on by pressing “1”.

NOTE: If the encoder was already enabled, you would turn off the encoder by pressing “1”.

3. Select “PULSE LENGTH” and enter the distance the product travels per pulse of the encoder.

The pulse length may be calculated using the following formula:

Pulse Length = (Distance Product Moves / Rev) / ((Encoder Pulses / Rev) x 4)

EXAMPLE: An encoder is mounted to a conveyor drive pulley and the circumference of that

pulley is 18.75”. Therefore, with one revolution of the encoder, the product on the

conveyor will travel 18.75”. The encoder is a factory encoder that generates 500

pulses per revolution.

Pulse length = 18.75” / (500 x 4)

Pulse length = 18.75” / 2000

Pulse length = 0.009375 “/pulse

Enter the pulse length value and press “ENTER”. Allowed values are between .00001 and 1.

A valid pulse length entry will send you back to the encoder menu.

4. Select “Velocity Filter Time” on the display. Enter a filter value between 0.006 and 0.1 and press

“ENTER”.

The velocity filter value is proportional to the number of past encoder pulse rates used in

computing the average encoder velocity. The average encoder velocity is multiplied by the pulse

length setting to obtain the product velocity. The applicator’s ability to track changes in product

velocity is proportional to the velocity filter setting. Larger filter values will slow down the

applicator response time but will result in more consistent label placement. Small filter settings

may lead to inconsistent label placement. A good overall filter value is 0.03.

Velocity Filter = (0.002)(# of past encoder rates: N)

Avg. Encoder Rate (t) = ( ER(t-1) + ER(t-2) + … + ER(t-N)) / N

Product Velocity = (Avg. Encoder Rate)(Pulse Length)

A valid filter number will take you back to the encoder setup menu.