Why doesn't the Model 1500 and 1550 totally immerse a 29" (750mm) stencil?
Smart Sonic has been manufacturing ultrasonic stencil cleaners since 1990. We have made the mistake years ago that new competitors are just now experiencing. A 29" stencil is only contaminated a maximum of 25-26 inches from one end. Therefore only 26 inches of the stencil requires immersion. The remaining 3 - 4 inches remains outside of the wash solution and serves as a convenient "handle." Otherwise, the user would need to wear gloves or the stencil would need to be placed into a basket.
Systems that totally immerse a 29" stencil need to be made taller to accommodate the additional 4 inches. This additional height makes it more difficult to load and unload. If the stencil is totally immersed, the user will need to load the stencil into a basket. Now, the user will need to lift the weight of the stencil and basket. The basket handles will be above the stencil which means the user will need to use a step ladder to clear the top of the machine.
OSHA frowns on an operator lifting anything above their shoulders. Therefore an automatic hoist may be required. If a step is used, OSHA may require a handicap ramp installation. A ramp will occupy 3 times the floor space as the cleaner.
Buy making the tank only as large as the required cleaning area, the system is more efficient, uses less wash solution and therefore generates less wastewater.
This is just one of the many advantages that Smart Sonic has gained from years of experience.