PW32

The Headway PW32 Spinner controller is a controller for the Headway PW32 Spinner. It supports recipe-based process programming with numbered recipes and steps, and it presents process status on an LCD display.^[1][2]

A process is organized as a recipe made up of steps. Recipes are numbered 0 through 9, and each step within a recipe is numbered 1 through 9. The controller can be in READY, RUNNING, REVIEWING, PROGRAMMING, or ABORT state, with the current recipe number shown in the upper left-hand corner of the LCD display.^[1][2]

Each step can be programmed for speed, acceleration or deceleration ramp, function outputs, and a step terminator. The step timer can be set from zero to 999.9 seconds, and the timer does not start until the programmed speed for that step has been reached. A step can also be terminated by the START switch or by an external input line if that is programmed for the step.^[1][2]

Vacuum to the chuck or substrate can be managed automatically or forced on by the operator. A motor rotation sensor forces vacuum on when the motor is spinning, overriding other vacuum control. The exhaust can be controlled automatically when an optional accessory exhaust controller is used, or overridden by the operator.^[1]

The controller is used for spinner recipe execution. During a running recipe, the spinner speed can be increased or decreased manually, and the step timer begins only after the set speed is reached. When the last step of a recipe terminates, the spinner decelerates to zero speed at its maximum deceleration rate unless an additional step is programmed to bring it to zero at a different deceleration rate.^[2][1]

The controller documentation describes use of the spinner in inhibited drying spinning techniques. It also notes that optional accessory functions may be controlled during a step, depending on the specific system configuration.^[2]