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Keyence GL-R Safety Fence Inspection

Taken verbatim from the Keyence GL-R User Manual (Keyence AS 89740 p. A-10 – 10[th] edition)

8.2.1 Inspection prior to daily operation (Daily inspection) You should check the GL-R operation and the machine operation according to the following checklist prior to daily operation.

Note that the following inspection items comprise only a bare minimum inspection. KEYENCE Corporation strongly recommends including the necessary checking items into this checklist based on the judgment of the responsible personnel since additional criteria may be necessary depending on both the machine to which the GL-R is installed and the laws, rules, regulations and standards in the country or region in which the GL-R is used/installed.

The result of this inspection must be kept on record along with the machine log.

Pre-check for installation condition.​

  • The GL-R is installed so that the machine operator cannot go into or approach the hazardous area without passing through the detection zone.

  • The GL-R has been installed at a distance greater than or equal to the minimum safety distance required.

  • When the reduced resolution function is applied, the safety distance is accurately calculated based on the detection capability, and the GL-R is installed at a distance greater than or equal to the minimum safety distance away from the hazardous zone or hazard.

  • When the fixed blanking function is applied, a hazardous clearance that is not protected by the GL-R may be generated between the obstacle and the GL-R. When such a hazardous clearance is generated, an additional protective device such as a safeguard is installed.

  • The GL-R is installed at a location free from light interference, for example fluorescent lamps.

  • The cable sheaths are not damaged. The protection against the disconnection or short-circuit of cable, which might be caused by crushing or being caught in a machine, is taken into account.

  • Additionally, you should perform the following inspections as described in "Inspection before operation".

Pre-check test while the machine is operating.​

  • There is no change of installation that would influence the result of your original risk assessment.

Regular (periodical) inspection​

The responsible personnel must perform a regular inspection.

It is recommended to perform a regular inspection at least once every six months. Note that the following inspection items comprise only a bare minimum inspection. KEYENCE Corporation strongly recommends including the necessary checking items into this checklist based on the judgment of the responsible personnel since additional criteria may be necessary depending on both the machine to which the GL-R is installed and the

laws, rules, regulations and standards in the country or region in which the GL-R is used/installed.

The result of this inspection must be kept on record along with the machine log.

Additional inspection items​

  • The actual distance between the hazardous zone or hazards and the GL-R keeps greater than the calculated safety distance.

  • When the reduced resolution function is applied, the safety distance is accurately calculated based on the enlarged detection capability, and the GL-R is installed at a distance greater than or equal to the minimum safety distance away from the hazardous zone or hazard.

  • When the fixed blanking function is applied, a hazardous clearance that is not protected by the GL-R may be generated between the obstacle and the GL-R. When such a hazardous clearance is generated, an additional protective device such as a safeguard is installed.

  • The stop time of the machine connected to the GL-R has not increased.

  • There are no loose screws in the mounting bracket.

  • The unit connection cable or the series connection cable is fastened tightly to the GLR with no loose screws.

  • The OSSD is connected correctly to the machine.

  • There is no damage to the GL-R that may influence IP65 structure.

  • The surface of the GL-R is not polluted or damaged.

  • Beam axes must be aligned. If it is out of alignment, beam axes are aligned.

  • There is no change of installation that would influence the result of your original risk assessment.