Abstract: Apparatuses, components, methods, and techniques for altering equipment operation are provided. An example tool control and breathable air delivery system includes equipment including a tool and a controller configured to control the tool. The example system also includes a wearable respirator and an air delivery device connected to the wearable respirator. The example system further includes an air evaluation monitor configured to generate a signal based upon a condition of air being delivered to the wearable respirator. An example electronic circuit is configured to adjust the tool based at least in part on the signal generated by the air evaluation monitor. An example method includes enabling the tool, providing air to a respirator, determining a condition of the air, and adjusting the tool based on the condition of the air.

Abstract: Apparatuses, components, methods, and techniques for altering equipment operation are provided. An example tool control and breathable air delivery system includes equipment including a tool and a controller configured to control the tool. The example system also includes a wearable respirator and an air delivery device connected to the wearable respirator. The example system further includes an air evaluation monitor configured to generate a signal based upon a condition of air being delivered to the wearable respirator. An example electronic circuit is configured to adjust the tool based at least in part on the signal generated by the air evaluation monitor. An example method includes enabling the tool, providing air to a respirator, determining a condition of the air, and adjusting the tool based on the condition of the air.

Abstract: Apparatuses, components, methods, and techniques for selectively texturing concrete surfaces are provided. An example method of providing a surface portion of an architectural precast concrete wall panel with an abraded texture is provided. The method includes a step of spraying a surface portion of an architectural precast concrete wall panel with an aqueous-based particulate abrasive mixture under conditions adequate to at least partially abrade the surface portion. An example sprayer system for abrading a concrete surface is also provided. The system includes an aqueous-based particulate abrasive mixture dispenser including a spray nozzle arrangement. The system also includes a material communication assembly in abrasive flow communication with the aqueous-based particulate abrasive mixture dispenser. The system also includes a dispenser positioning arrangement.