TS5000-user-guide.pdf - 第6页

6 5. SETUP INSTRUCTIONS 5.1 Mechanical Mo unting: Normally, the TS5000 valve is used on an au tomated XYZ table with full motion control in the three plane s. It is very im portant that the v alve be mounted on the Z-axi…

Note: Solvent can be used for purging instead of conditioner. If a solvent if

used, remember to reduce air pressure. Also check the chemical compatibility

chart to determine if solvent used will not affect the Viton O-ring on the feed

screw.

9.2 Thorough Cleaning:

A more through cleaning procedure should be done whenever the following

occur:

• Dispense fluid is changed to different type.

• Dispense fluid started to cure in the valve

• Valve has been dispensing for one month.

• Dispense tip clogged frequently.

Tool required: Open-end wrench, 3/32 hex wrench (included in valve cleaning

kit, part number: 5000-000-013)

1. Follow steps 1-7 in “Valve Purging” section.

2. Remove barrel of conditioner (11) from the valve assembly.

3. Disconnect the motor cable (1) from the controller.

4. Using a 3/32 hex wrench to unscrew the two socket head screws (6)

from the valve assembly.

5. Grasp the motor assembly (2) as close to the valve body (5) as

possible. (Pulling on the motor assembly near the cable and may

result in separation on the motor from the gear head.) Gently pull

straight up on the motor assembly. The motor/feed screw assembly

should pull out of the valve body. Do not pry on the motor if the

motor assembly does not withdraw easily. If the motor/feed screw

assembly has been removed from the valve, go to step 10, otherwise

continue to step 7.

6. Reattach control cable (1) to the controller, taking care to properly

attach with correct polarity. (Feed screw should rotate

counterclockwise when viewed from the dispense tip.)

7. Grasp the motor near the valve body to keep the motor from rotating.

With the motor running, pull straight up on the motor/feed screw

The amount of fluid dispensed will be determined by the following parameter:

• DV Voltage input

• Motor assembly selections

• Feed screw pitch

4. THEORY OF OPERATION

The TS5000 Rotary Microvalve dispenses fluid with a positive displacement

action using a rotary feed screw principle. Fluid in held in a feed reservoir (1)

under a positive head of air, between 1 to 20 psi, depending upon the viscosity

of the fluid. This positive air pressure, supplied by the air line (7), forces the

fluid out of the barrel (1) into the vertical feed shaft of the valve body (2), and

then through the angled feed shaft (3), to the feed screw chamber (4). Fluid

flows from this point (4) to the dispense point (5) is controlled by the feed

screw rotation in the feed direction. The feed screw is driven by the DC motor

(6). Applying a DC voltage signal to the DC motor (6), will rotate the feed

screw and the fluid will be forced out the dispense tip. The actual fluid

deposited is dependent upon adhesion of the dispensed fluid to the substrate.

Shearing of the fluid is achieved by reverse Z-motion (tip retraction). When

the motor stops, the unit remains in position for a fraction of a second (dwell)

to allow the last drop of fluid to flow out of the dispense tip. After the dwell

period, the automation equipment moves the TS5000 valve to the next position.

Figure 3.0

MICROVALVE

TS5000

Motor Assembly

Dispense Tip

Fluid Reservoir

Vertical Feed

Shaft

45° Feed Shaft

Locking Hub

Feed Screw

Chamber

Reservoir

Air Line

5. SETUP INSTRUCTIONS

5.1 Mechanical Mounting:

Normally, the TS5000 valve is used on an automated XYZ table with full

motion control in the three planes. It is very important that the valve be

mounted on the Z-axis gantry in a secure manner that will not allow

loosening during dispense operation. The Z-axis must move in a precise

and repeatable motion for successful dispensing.

The provided mounting bracket, or customer supplied bracket, must be

attached to the Z-axis in a manner that will provide the valve

perpendicular travel to the horizontal plane of the surface on which the

fluid will be dispensed. The mounting should provide a means of

accurately adjusting the gap between the dispense tip and the substrate

surface such as a touchdown sensing device or a fixed distance standoff.

5.2 Electrical Connection:

The TS5000 valve requires an electrical connection of two wires for the

DC motor. The motor lead wires are 24” long. The black lead wire

should be connected to the negative or neutral lead from the motor

control voltage source. To verify the connection, check the rotation

direction of the feed screw. When correctly connected, a positive voltage

signal will drive the feed screw in a counter clockwise direction when

view from the dispense tip end.

The recommended controller for the TS5000 valve is the TS500R. If

another controller is used made sure the control voltage signal is

precisely control. The signal should be from a regulated power supply

and should be shunted to positive motor stop. Below is a diagram of a

simple braking circuit:

Figure 4.0

9. MAINTENANCE AND CLEANING:

Figure 6.0

9.1 Valve Purging:

Refer to figure 6.0

4. Release fluid pressure.

5. Remove barrel of fluid (11) from the valve.

6. Remove dispense tip (7).

7. Install a barrel of dispensing conditioner (Part number 7305XCON)

to the valve inlet (10).

8. Set air pressure at 8.0 Psi.

9. Turn on valve and let it run until the conditioner is the only material

being dispensed at the valve outlet. If the conditioner is unable to

force the dispense fluid out the valve then proceed to the “Thorough

Cleaning” section.

10. Turn off valve and release air pressure.

MICROVALVE

TS5000

DO NOT REMOVE

THIS FITTING

8. TROUBLESHOOTING

PROBLEM POSSIBLE CAUSE CORRECTION

No Fluid Flow

Dispense tip is plugged Replace tip

Motor does not receive

signal

Make sure all connections are

secured

Motor running in

reverse

Reverse motor cable

connection.

Barrel of dispense fluid

is emptied

Replace with new fluid barrel.

Fluid feed pressure is

too low

Increase feed pressure.

Valve damaged

Return valve to factory for

refurbishment

Inconsistent

Fluid Flow

Fluid pressure

fluctuating

Make sure fluid pressure is

constant

Valve on time is too

short

Increased valve on time.

Excessive motor reverse

time

Reduce reverse time or turn off

completely.

Air trapped in fluid

housing

Purge valve properly

Fluid drools after the

valve turned off

Air trapped in fluid

housing

Purge valve properly

Air trapped in fluid

reservoir

Remove air from reservoir

Excessive fluid feed

pressure

Reduce pressure or turn off

pressure when the valve is

idled.

Dispense tip clogged

Tip contacting substrate Increase dispense height

Tip bent or damaged Replace tip

Particles size in fluid

too big

Replace with bigger tip

5.3 Air connection:

Filtered air supply must be precisely regulated and should be set between

1-20 psi. The air supply is not used as the main dispensing force. It is

only required to move the fluid to the feed screw chamber.

The valve is supplied with sample of 10 and 30-CC air power syringe

assembly. The syringe of fluid can be mounted directly onto the valve

inlet fitting. Fluid can also be supplied from a remotely located

container, such as cartridge systems.

6. TYPICAL SYSTEM SETUP

Figure 5.0

Items Description Items Description

1 Power Button 6 Air pressure regulator knob

2 Mode Button 7 Foot Switch

3 Set Button 8 TS5000 Rotary Pump

4 LCD Display 9 Air Filter

5 Power Adapter 10 Material reservoir

TO AIR SOURCE

321