Nordson Encore XL Powder, Manual

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© 2021 Nordson Corporation
1607027-01
5-3 Operation
Feed Center Operation
Refer to Figure 5-1 for the feed center operator controls, and
Setup
section for the PLC
function settings.
Sieve Operation
See Figure 5-1. Powder is supplied to the feed center by HDLV reclaim and virgin powder
transfer pumps. The powder is screened before flowing into the feed hopper. The sieve is
turned on and off with the Sieve Control switch (4).
When the sieve is turned off, the reclaim and virgin powder transfer pumps are disabled.
Reclaim and Virgin Pump Selector Switch Operation
See Figure 5-1. The operation of the Reclaim and Virgin powder transfer pumps are
controlled by separate selector switches (2, 3). Turning the switches to ON ( I ) enables
the transfer pumps.
If the reclaim or virgin transfer pump selector switches are in the ON position when the
feed center is turned on, or after a color change cycle is completed, then the pumps will
be forced off. To re-enable the pumps, toggle the selector switches off then on.
The virgin transfer pump is disabled when the sieve is turned off.
Reclaim Transfer Pump Operation
The reclaim pump operates continuously as long as it is turned on.
Virgin Transfer Pump Operation
The virgin transfer pump operation is controlled by a level sensor on the lance. If the
powder level in the feed hopper falls below the level sensor, a delay timer (Screen
2, Virgin Powder Transfer Delay) is started. When the delay timer runs out, the virgin
powder transfer pump is started. The pump runs until the powder in the feed hopper
reaches the level sensor, then turns off.
If the level sensor detects a low level of powder for too long (Low Powder Alarm Delay,
Screen 3), a buzzer is turned on to warn the operator that the feed hopper powder supply
has not been replenished.
The buzzer can be silenced by:
• filling the feed hopper until the powder contacts the level sensor.
• momentarily turning on gun purge.
•
turning the virgin transfer pump off.