Nordson ASYMTEK User Manual

Nordson Asymtek
Mini and micro dispensing solutions for fluids and pastes
page 7 off 20
3. Commissioning or starting up
3.1 General notice
 Make sure you are aware of the safety instructions under 1.2 and your local
legislation
 Make sure enough material is available
 Make sure all connections are well tightened and sealed
 Make sure all pump materials are compatible and resist the product
3.2 Trials
Testing with water can cause loud noises and destroy the stator. Reason for this effect is the
lack of lubrication by water. You may use Vaseline oil or glycol instead or insert an EPDM
based stator (if available). Fluor elastomers such as Viton
®
, Viton Extreme are to be
completely avoided with water. Alternatively you may test with the product used for the
application or also mesamol. Demineralised water is restricted for use at all times because it
may attack all pump materials. Please ask your distributor.
3.3 How to avoid dry running
Since the rotor made of metal is running in an elastomeric rubber stator, heat can be
produced when no material is being transported due to the lack of lubrication. There cannot
be any heat dissipation because the rubber stator is working like a shield. A continuous
friction builds up increasing heat that cannot be controlled therefore the stator material can
be destroyed rapidly relative to the pump speed. Possible solution: Start the pump slowly at
max. 10 rpm for max. 1 minute and/or pre-fill the pump.
3.4 Calibration (If available. Please see handbook electronics/controls)
Calibration is a process to enable the control box to understand about the volumetric filling
degree of the pumps cavities when it is being used for dosing or dispensing. Only by
performing this process you will reach the highest accuracy offered by ASYMTEK
®
.
The calibration can be performed many times. We suggest to recalibrate every time you
change the material or nozzle. Furthermore, recalibration may elongate the use of your
ASYMTEK Dosing pump after having used it for a longer period; the process will incorporate
possible low wear of the stator. You can easily calibrate by using a scale, start 1 round,
calculate the steps and divide taking into account the Specific Weight.
3.5 Position of the pump
Basically, all ASYMTEK pumps can be positioned in any direction. Nevertheless, please
consider the following:

Nordson ASYMTEK Specifications

General

Fluid Types	Adhesives, underfills
Dispensing Technologies	Jet, needle
Work Area	Varies by model
Vision System	High-resolution cameras for alignment and inspection
Applications	Underfill, encapsulation, solder paste dispensing, adhesive dispensing
Material Compatibility	Compatible with a wide range of materials, including those with high viscosity or abrasive properties