Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

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SMEMA compatability

#27803

SMEMA compatability | 29 March, 2004

What is the importance of SMEMA compatability regarding height of the PCB during transport? Most machine manufacturers ignore this and simply give you blocks to put under the machine if you need them. My question is if all of your equipment was designed for 35" tranport height why would you conform to SMEMA height (37.5")? What is the standard for most conveyor manufacturers?

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CAL

#27817

SMEMA compatability | 30 March, 2004

SMEMA is not just conveyor height. It also is Conveyor width, Edge Clearance, Tooling pins, Maximun Machine gap, and Lead in of conveyor. Additional, SMEMA is a machine communications Protocol for machine to machine or machine to conveyor communications link. Some of the older FUJI machines, for example, only cared about conveyor on/conveyor off instead of Up Stream/Down Stream, PCB waiting, Machine busy and different equipment states. Also, A fair amount of machines are sold to Asia and Europe where automation lines are lower, so it adds stability to have the machine up on risers instead of 10"-15" of leg srews.

www.smema.org

ENJOY, Cal

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#27819

SMEMA compatability | 30 March, 2004

Thanks Cal, I'm aware of most of what you say. It seems that the height though is routinely ignored. You say 10"-15" of leg screws, surely the difference can't be that much. All of the Asian PnP machines I have specs on are 900mm +/- for transport height, about 50mm or 2" lower than SMEMA standard. Only the Siemens machines seem to go lower (down to 830mm). Is there a standard height for Asia (interested in China for example)?

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CAL

#27831

SMEMA compatability | 31 March, 2004

Being a former Apps Engineer I hear what yer saying. The 10" Leg Screw was hypothetically speaking about Siemens Machines. Since they do go lower the need for a 10" leg screw is needed. They do not use a 10" leg screw they use platform feet risers instead. The Siemens Machines go lower because of their design. The platform that SIPLACE created, i.e. S-15 and f series, the Monitor and keyboards were mounted on the rear center of the machines with a moving arm. Since the monitor was mounted higher than other machines there was a need to be lower for operators to key in information. Machines Targeted for the Asian market, i.e. Suzuki are still with in the SMEMA specs.

LOL- What was the original question?

Cal

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