Instruction Manual

Beginning Programming 8-11

Dots

FmNT can dispense precision dots as well as lines. Dots are used in surface mount adhesive (SMA)

applications. For this exercise, use the valve conditioning fluid. The conditioning fluid more closely

simulates the characteristics of SMA fluids.

The size of the dots and characteristics of the dispensing are controlled by Dot Parameters in the Edit Dot

Parameters.

You will learn how to program and dispense dots on the workpiece. Next, you will learn how to alter the

size of the dots and re-perform the dispense.

Estimated time to complete: 30 minutes.

To view the customizable parameters for Dot Parameters:

1. In the Main Window, click on

Teach a Program.

2. In the Programming Window, click on

Edit and select Edit Dot Parameters.

> A dialog box may open indicating the type of valve installed on your dispensing system

and which valve, Valve 1 or Valve 2, is currently active.

3. Click on

OK.

> The Dot Parameters dialog box opens.

> Click on each tab to view all available parameters.

> Below are brief explanations of each parameter.

Settling Time

This is the length of time that the dispensing head will park over the dispensing location before beginning

to dispense. The Settling Time is set to 0, except in special circumstances. For more information, contact

Asymtek Application Engineering.

Down Speed

The Down Speed is how fast the dispensing head lowers to dispense. Low viscosity fluids tend to drip

and you may want to set this parameter to a high value. The higher the value, the faster the dispensing

head will move. Height sense accuracy is dependent on Down Speed and Down Acceleration. See more

Height Sensor information in the dispensing system Operations Manual. The units are inches/second.

Typically, 2 in/sec is the default setting.

Down Acceleration

This parameter controls how fast the dispensing head accelerates to the Down Speed. The higher the

value, the faster the dispensing head will move. The units are in inches/second squared. Typically, 300

in/sec

is the default setting.