Machine Stop Measurement and Safety Device Validation

Machine Stop Measurement and Safety Device Validation:

VIDEO of High Speed Stop Measurement

When determining the safety distance, Odiz Safety uses proprietary high-speed cameras and analytical software as a Stop-Time Measurement Device to check the stopping time of the machine. The STM (stop-time measurement) device measures the time it takes a machine to stop after a safety device is tripped. It is mainly used on reciprocating (stroking or cycling) machines, such as mechanical and hydraulic presses or press brakes. This methodology can also be used on machines that rotate, such as lathes, mills, and drills.

Industry uses this type of device to find the stopping time of a machine before installing safeguarding devices such as a two-hand control or a presence sensing device. The stopping time measured by the STM device during the hazardous portion of the cycle is used in the OSHA or ANSI formulas to calculate the safety distance. The safety distance is then used to establish the location of the safeguarding device in relation to the nearest hazard. This device can also be used to periodically check the machine's stopping time to ensure that the current safety distance corresponds to the current condition of the machine's stopping ability.

Once the stop-time is determined, we will then use OSHA 29 CFR 1910.217(c)(3)(iii)(e): The safety distance from the sensing field to the point of operation shall be greater than the distance determined by the OSHA Safety Distance Chart. The Chart will help us determine the distance required for the safety devices. If this is a pre-existing setup, Odiz will confirm the existing safety device distance meets OSHA standard.

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