TS5000-user-guide.pdf - 第7页

10 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 c…

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

7. DISPENSING APPLICATIONS

The following details of dispensing applications are extremely important. The

dispense rate and repeatability rate of the valve can be affected by these

parameters:

A. DC Motor Voltage Level:

Voltage controls motor speed (RPM). High voltage produces high

motor speed and low voltage reduces motor speed.

B. Motor shaft Speed:

Motor gear ratio configuration determines final shaft speed. High

RPM = High Output. Low RPM = Low Output.

C. Feed screw pitch:

Rate of fluid dispensed is determined by the pitch of the feed screw.

A high pitch number will produce a low dispense rate and a low pitch

number will produce a higher dispense rate.

D. Dispense tip:

The size of the dot diameter or bead width is determined by the

dispense tip. A low gauge number (larger I.D.) will dispense a large

diameter dot or a wide bead. A high gauge number (smaller I.D.)

will dispense a smaller diameter dot or a narrower bead.

Dispense tip sizes smaller than 25-gauge and longer than 1/2" are not

recommended to use with solder paste. A normal rule of thumb to

choose the dispense tip size is that the dot size equal 1.5 times the

internal diameter of the dispense tip.

E. Fluid feed pressure:

The fluid feed pressure does affect the amount of fluid dispensed

through the valve. Optimum feed pressure is dependent upon

viscosity of fluid dispensed. Only in unusual circumstances should

the feed pressure exceed 20 psi.

F. Dispense Fluid:

The viscosity of the dispense fluid along with the particulate

additives to the dispense fluid will also determine the dispense rate.

Ability to dispense may be directly related to the fluid formulation.

G. Dispense cut off:

The best method of stopping fluid flow at the end of the cycle is to

short the motor (grounding the DC voltage signal through a current

limiting resistor). This method provides a complete rotational brake

of the motor at the shut off point. Another method of stopping fluid

flow is to reverse the motor rotation by reversing the DC voltage

signal. This can be described as suck-back action. In both cases, a

no-drip dispensing action can be achieved. Turn off the fluid feed

pressure when the valve is not dispensing will prevent dripping and

oozing.

H. Dispense tip height:

The distance between the dispense tip and substrate surface is

extremely important. To obtain accurate dot size, the dispense tip

height should remain constant for each dot/bead. If the dispense tip

height fluctuates during dispense process, the dot/bead size will vary.

If the dispense tip touches the dispense surface, clogging will occur.

I. Fluid (Material) condition:

The physical condition of the dispense fluid is very important to

successful dispensing. There are a number of conditions that can

prevent continuous and consistent dispensing such as:

1. Freshness: Old fluid (most fluid have a recommended shelf life)

leads to erratic dispensing and frequent clogging, especially with

solder paste. Make sure to check the fluid shelf life before starting

the dispense process.

2. Separation: Fluid with high content of solid particles, such as solder

paste, tends to separate at high pressure. If the dispense fluid

started to separate, please replace it with new fresh fluid.

3. Particles sizing: Do not attempt to dispense solder paste with

particle sizes bigger than 75 microns (-200+325 mesh size).