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STINGER ELEMENTS Chapter Issue 4, Nov 19 Technical Reference Manual 38.7 itive field changes and this chang e is indi cated on the printer’s display interface. The cartridge is changed and the level sensor is recalibrate…

38.6 Technical Reference Manual Chapter Issue 4, Nov 19

STINGER

ELEMENTS

steps, speed, and direction are programmable parameters.

Nozzles At the bottom of the auger valve a nozzle is fitted. Nozzles come in different

sizes to suit the process. They are identified by body colour: Purple tip i.d.=

0.51mm (inside diameter at the tip), Blue = 0.41mm tip i.d, Orange = 0.33mm

tip i.d. and Red = 0.25 tip i.d.

Purge Station An optional purge station can be used to collect the purged adhesive. Parame-

ters are set up to centre the needle in the wiper target. The needle is fed into

the purge station. Purging commences when the start purge button is selected

and continues until the stop purge button is selected. If a purge station isn’t

used, purging takes place on a suitable area on the product.

Capacitive Level

Sensor

The capacitive level sensor detects the change in capacitance of the surround-

ing near field area. When a full cartridge is fitted, the capacitive field remains

constant. As the adhesive in the syringe is depleted, there is no change in

capacitance until it reaches the point where the sensor is located. The capac-

Auger Valve

(showing screw)

Nozzles

Complete Assembly

(including air connection)

Syringe

Nozzle

Wiper

Target

Purge Station

Waste Container (pot)

STINGER

ELEMENTS

Chapter Issue 4, Nov 19 Technical Reference Manual 38.7

itive field changes and this change is indicated on the printer’s display interface.

The cartridge is changed and the level sensor is recalibrated to show a full

condition.

Laser Surface

Height Detector

The laser is used to detect the point where the upper surface of the product is;

this data is used to calibrate the relative dispense height of the nozzle. The unit

is automatically adjusted in software and carries out its own calibration cycle as

part of the set up routine. The LED’s on the front of the unit can be ignored and

the yellow button must not be adjusted.

Auger Motor The auger motor drives the screw in the auger valve; the number of turns is set

by a feed parameter in the software. The screw provides control over the

amount of adhesive to be deposited and ‘works’ the adhesive to pre-condition

it. This ensures that at the correct height, the nozzle deposits a precise amount

of adhesive to the product surface and flow is maintained throughout the deposit

cycle.

Z Axis Motor The z axis motor drives the unit to this calibrated height location. An end stop

dowel provides a stall point for the motor upper limit (see graphic). Refer to the

Calibration section of this manual for details on setting the calibrated heights for

deposit and idle heights

Control Interface The control interface is mounted on the panel at the rear of the printer. It

provides all the electrical and the pneumatic control functionality. An air pres-

38.8 Technical Reference Manual Chapter Issue 4, Nov 19

STINGER

ELEMENTS

sure regulator sets pneumatic pressure.

The control interface is responsible for interfacing with the printing machine and

locally controlling Stinger’s functions: axis control, motor moves and air pulsing.

Electrical Power In

Stinger Power & Signal

Serial RS232 to PC

Air Input Connector

Air Output Connector

Control Interface