R 408.16225 Point of operation devices.
Rule 6225. (1) Either of the following point of operation devices shall protect an
(a) A device that prevents or stops, or both, the normal machine function if the
operator's hands are within the point of operation.
(b) A device that requires the application of both of the operator's hands to the
machine operating controls until a point is reached in the cycle where the operator
cannot remove a hand and place it within a pinch point or point of operation. Sweep
guards are not acceptable as a device to protect the operator.
(2) If a presence-sensing point of operation device is used, it shall protect the
operator as provided in subrule (1)(a) of this rule and shall be interlocked into the control
circuit to prevent or stop motion if the operator's hand or other part of his or her body is
within the sensing field of the device during the closing cycle of the machine. The
device shall not be used to initiate operation of the machine and shall be in compliance
with all of the following provisions:
(a) The device shall be constructed so that a failure within the device initiates a
stopping action and prevents the initiation of a successive cycle until the failure is
corrected. The failure shall be indicated by the system.
(b) The distance from the sensing field to the point of operation shall be such so as
to permit the mold or die to close or stop before the employee can reach into the
point of operation with any body part.
(c) Safety guards shall be used to protect an employee from all hazardous
motion which is not protected by the presence-sensing device.
The protection function of a presence-sensing point of operation device may be
bypassed for the purposes of parts ejection, circuit checking, and feeding as the mold or
die opens if the operator is not exposed to hazardous motion.
History: 1992 AACS.
R 408.16226 Controls.
Rule 6226. (1) An operating control shall be guarded against accidental contact. A
control button or lever shall be identified as to its function.
(2) If a machine requires more than 1 operator, and if each operator is exposed to a
point of operation, the controls shall be activated concurrently before the machine will
(3) A machine shall be provided with an emergency stop control at each operator
station. The stop control shall be red in color and readily accessible. A button, if used,
shall have a mushroom shape.
(4) A machine shall be provided with a means that, upon power failure, will prevent
automatic restarting upon the restoration of power. Fire, coolant, and sump pumps are
excepted from the requirements of this subrule.
(5) When used, interlocks shall be installed to minimize the possibility of accidental
operation or tampering.