1. A method of operating a motor for driving a web handling mechanism structured to selectively move a web toward a blade of a web cutter, the motor being controlled by a closed loop servo control system employing a digital filter, the digital filter employing one or more gain coefficients, the method comprising:
increasing one or more of the gain coefficients by a corresponding first predetermined amount when the motor reaches a coefficient boost motor position, the coefficient boost motor position being a predetermined distance before a commanded motor rest position, wherein the commanded motor rest position corresponds to a position of the web handling mechanism at which the blade cuts the web; and
decreasing the one or more of the gain coefficients by a corresponding second predetermined amount a predetermined time after the motor reaches the commanded motor rest position.
2. The method according to claim 1, wherein increasing comprises increasing the one or more of the gain coefficients from a corresponding original value to a corresponding boosted value, and wherein decreasing comprises returning the one or more of the gain coefficients to its corresponding original value.
3. The method according to claim 2, wherein increasing comprises multiplying the one or more of the gain coefficients by a corresponding multiplier.
4. The method according to claim 3, wherein the multiplier is 2.75, wherein the predetermined distance is 5 mm, and wherein the predetermined time is 4 ms.
5. The method according to claim 1, wherein the digital filter comprises a PID filter, and wherein the one or more of the gain coefficients comprise a proportional gain coefficient and a derivative gain coefficient.
6. The method according to claim 1, wherein the web handling mechanism comprises a primary tractor set.
7. The method according to claim 3, wherein the digital filter comprises a PID filter, and wherein the one or more of the gain coefficients comprise a proportional gain coefficient and a derivative gain coefficient.
8. The method according to claim 7, wherein the multiplier is 2.75, wherein the predetermined distance is 5 mm, and wherein the predetermined time is 4 ms.
9. A web cutter for cutting a web, comprising:
a blade for selectively cutting the web;
a web handling mechanism structured to selectively move the web toward the blade; and
a motor system for driving the web handling mechanism, the motor system including a motor and a closed loop servo control system controlling the motor, the closed loop servo control system employing a digital filter, the digital filter employing one or more gain coefficients, the closed loop servo control system being adapted to:
increase one or more of the gain coefficients by a corresponding first predetermined amount when the motor reaches a coefficient boost motor position, the coefficient boost motor position being a predetermined distance before a commanded motor rest position, wherein the commanded motor rest position corresponds to a position of the web handling mechanism at which the blade cuts the web; and
decrease the one or more of the gain coefficients by a corresponding second predetermined amount a predetermined time after the motor reaches the commanded motor rest position.
10. The web cutter according to claim 9, wherein the closed loop servo control system is adapted to increase the one or more of the gain coefficients from a corresponding original value to a corresponding boosted value, and to decrease the one or more of the gain coefficients to its corresponding original value.
11. The web cutter according to claim 9, wherein the closed loop servo control system is adapted to multiply the one or more of the gain coefficients by a corresponding multiplier.
12. The web cutter according to claim 11, wherein the multiplier is 2.75, wherein the predetermined distance is 5 mm, and wherein the predetermined time is 4 ms.
13. The web cutter according to claim 9, wherein the digital filter comprises a PID filter, and wherein the one or more of the gain coefficients comprise a proportional gain coefficient and a derivative gain coefficient.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A security shutter assembly comprising:
upper and lower horizontal frame members secured to framework surrounding an opening to be shuttered;
left and right shutter doors each having left and right vertical stiles forming left and right frame members of each of said left and right shutter doors, said left vertical stile of said left shutter door and said right vertical stile of said right shutter door being hingedly mounted between said upper and lower horizontal frame members, said left vertical stile of said right shutter door having a vertical flange for engaging and securing said right vertical stile of said left shutter door when said left and right shutter doors are in a closed and locked position;
a plurality of horizontal louvers pivotally mounted between said left and right stiles of each of said left and right shutter doors, each of said plurality of louvers having a central longitudinal opening therein;
a security member retained within said central longitudinal opening of a selected one or more of said plurality of louvers;
a latch socket block mounted to said framework within said upper horizontal frame member so as to be hidden from view;
a latch actuator block mounted to said framework within said lower horizontal frame member so as to be hidden from view, said latch actuator block being mounted in general vertical alignment with said latch socket block; and
a shot pin latching mechanism vertically positioned between said latch socket block and said latch actuator block to secure said left and right shutter doors in said closed and locked position, said shot pin latching mechanism comprising:
a vertical shot pin mounted to said left vertical stile of said right shutter door behind said vertical flange, said shot pin extending upwardly from said latch actuator block when said left and right shutter doors are in a closed position; and
a latch handle mounted on said latch actuator block, said latch handle being accessible through an opening in a bottom surface of said lower horizontal frame member, said latch handle being linked to a plunger to provide upward and downward travel of said plunger, said plunger being positioned for engaging a bottom end of said shot pin in response to locking actuation of said latch handle to thereby raise said shot pin into a position of engagement of a top end thereof with said latch socket block to thereby secure said left and right shutter doors in said closed and locked position, said latch handle being concealed from view behind said lower horizontal frame member when said left and right shutter doors are in said closed and locked position, said latch handle being operative for unlocking actuation thereof to move said plunger away from engagement with said bottom end of said shot pin, thus permitting said shot pin to gravitationally move to a position of disengagement of said top end thereof from said latch socket block, thereby unlocking said left and right shutter doors, said latch handle extending below said lower horizontal frame member in a viewable position when said left and right shutter doors are unlocked.
2. A security shutter assembly as in claim 1, wherein said security member retained within said central longitudinal opening of selected ones of said plurality of louvers comprises a wire rope member.
3. A security shutter assembly as in claim 2, wherein said wire rope member comprises a hardened steel wire rope.
4. A security shutter assembly as in claim 1, further comprising a pair of tilt rod mechanisms, one of said tilt rod mechanisms being positioned behind said left vertical stile of said left shutter door and the other one of said tilt rod mechanisms being positioned behind said right vertical stile of said right shutter door, each of said tilt rod mechanisms linking said plurality of louvers of a respective one of said left and right shutter doors for pivotal movement in concert.
5. A security shutter assembly as in claim 1, further comprising a corner hinge block mounted inside said upper and lower horizontal frame members at each end thereof, each corner hinge block being concealed from view within said upper and lower horizontal frame members, each corner hinge block having a protruding hinge pin mounted therein for matingly engaging openings at upper and lower ends of said left vertical stile of said left shutter door and said right vertical stile of said right shutter door.
6. A security shutter assembly as in claim 1, wherein top and bottom surfaces of each of said plurality of horizontal louvers are curved in shape.
7. A security shutter assembly comprising:
upper and lower horizontal frame members secured to framework surrounding an opening to be shuttered;
left and right shutter doors each having left and right vertical stiles forming left and right frame members of each of said left and right shutter doors, said left vertical stile of said left shutter door and said right vertical stile of said right shutter door being hingedly mounted between said upper and lower horizontal frame members, said left vertical stile of said right shutter door having a vertical flange for engaging and securing said right vertical stile of said left shutter door when said left and right shutter doors are in a closed and locked position;
a latch socket block mounted to said framework within said upper horizontal frame member so as to be hidden from view;
a latch actuator block mounted to said framework within said lower horizontal frame member so as to be hidden from view, said latch actuator block being mounted in general vertical alignment with said latch socket block; and
a shot pin latching mechanism vertically positioned between said latch socket block and said latch actuator block to secure said left and right shutter doors in said closed and locked position, said shot pin latching mechanism comprising:
a vertical shot pin mounted to said left vertical stile of said right shutter door behind said vertical flange, said shot pin extending upwardly from said latch actuator block when said left and right shutter doors are in a closed position;
a latch handle mounted on said latch actuator block, said latch handle being accessible through an opening in a bottom surface of said lower horizontal frame member, said latch handle being linked to a plunger to provide upward and downward travel of said plunger, said plunger being positioned for engaging a bottom end of said shot pin in response to locking actuation of said latch handle to thereby raise said shot pin into a position of engagement of a top end thereof with said latch socket block to thereby secure said left and right shutter doors in said closed and locked position, said latch handle being concealed from view behind said lower horizontal frame member when said left and right shutter doors are in said closed and locked position, said latch handle being operative for unlocking actuation thereof to move said plunger away from engagement with said bottom end of said shot pin, thus permitting said shot pin to gravitationally move to a position of disengagement of said top end thereof from said latch socket block, thereby unlocking said left and right shutter doors, said latch handle extending below said lower horizontal frame member in a viewable position when said left and right shutter doors are unlocked.
8. A security shutter assembly as in claim 7, further comprising a corner hinge block mounted inside said upper and lower horizontal frame members at each end thereof, each corner hinge block being concealed from view within said upper and lower horizontal frame members, each corner hinge block having a protruding hinge pin mounted therein for matingly engaging openings at upper and lower ends of said left vertical stile of said left shutter door and said right vertical stile of said right shutter door.
9. A security shutter assembly comprising:
upper and lower horizontal frame members secured to framework surrounding an opening to be shuttered;
a shutter door having left and right vertical stiles forming left and right frame members thereof, a selected one of said left and right vertical stiles being hingedly mounted between said upper and lower horizontal frame members at an end thereof that is proximate said selected one of said left and right vertical stiles, a remaining one of said left and right vertical stiles having an outwardly protruding vertical flange;
a plurality of horizontal louvers pivotally mounted between said left and right stiles of said shutter door, each of said plurality of louvers having a central longitudinal opening therein;
a security member retained within said central longitudinal opening of a selected one or more of said plurality of louvers;
a latch socket block mounted to said framework within said upper horizontal frame member so as to be hidden from view;
a latch actuator block mounted to said framework within said lower horizontal frame member so as to be hidden from view, said latch actuator block being mounted in general vertical alignment with said latch socket block; and
a shot pin latching mechanism vertically positioned between said latch socket block and said latch actuator block, behind said vertical flange, to secure said shutter door in a closed and locked position, said shot pin latching mechanism comprising:
a vertical shot pin mounted to said remaining one of said left and right vertical stiles of said shutter door behind said vertical flange, said shot pin extending upwardly from said latch actuator block when said shutter door is in a closed position; and
a latch handle mounted on said latch actuator block, said latch handle being accessible through an opening in a bottom surface of said lower horizontal frame member, said latch handle being linked to a plunger to provide upward and downward travel of said plunger, said plunger being positioned for engaging a bottom end of said shot pin in response to locking actuation of said latch handle to thereby raise said shot pin into a position of engagement of a top end thereof with said latch socket block and to thereby secure said shutter door in said closed and locked position, said latch handle being concealed from view behind said lower horizontal frame member when said shutter door is in said closed and locked position, said latch handle being operative for unlocking actuation thereof to move said plunger away from engagement with said bottom end of said shot pin, thus permitting said shot pin to gravitationally move to a position of disengagement of said top end thereof from said latch socket block, thereby unlocking said shutter door, said latch handle extending below said lower horizontal frame member in a viewable position when said shutter door is unlocked.
10. A security shutter assembly as in claim 9, wherein said security member retained within said central longitudinal opening of selected ones of said plurality of louvers comprises a wire rope member.
11. A security shutter assembly as in claim 10, wherein said wire rope member comprises a hardened steel wire rope.
12. A security shutter assembly as in claim 9, further comprising a tilt rod mechanism, said tilt rod mechanism being positioned behind said remaining one of said left and right vertical stiles of said shutter door, said tilt rod mechanism linking said plurality of louvers of said shutter door for pivotal movement in concert.
13. A security shutter assembly as in claim 9, further comprising a corner hinge block mounted inside said upper and lower horizontal frame members at said end thereof that is proximate said selected one of said left and right vertical stiles, said corner hinge block being concealed from view within said upper and lower horizontal frame members, said corner hinge block having a protruding hinge pin mounted therein for matingly engaging openings at upper and lower ends of said selected one of said left and right vertical stiles of said shutter door.
14. A security shutter assembly as in claim 9, wherein top and bottom surfaces of each of said plurality of horizontal louvers are curved in shape.
15. A security shutter assembly comprising:
upper and lower horizontal frame members secured to framework surrounding an opening to be shuttered;
a shutter door having left and right vertical stiles forming left and right frame members thereof, a selected one of said left and right vertical stiles being hingedly mounted between said upper and lower horizontal frame members at an end thereof that is proximate said selected one of said left and right vertical stiles, a remaining one of said left and right vertical stiles having an outwardly protruding vertical flange;
a latch socket block mounted to said framework within said upper horizontal frame member so as to be hidden from view;
a latch actuator block mounted to said framework within said lower horizontal frame member so as to be hidden from view, said latch actuator block being mounted in general vertical alignment with said latch socket block; and
a shot pin latching mechanism vertically positioned between said latch socket block and said latch actuator block, behind said vertical flange, to secure said shutter door in a closed and locked position, said shot pin latching mechanism comprising:
a vertical shot pin mounted to said remaining one of said left and right vertical stiles of said shutter door behind said vertical flange, said shot pin extending upwardly from said latch actuator block when said shutter door is in a closed position; and
a latch handle mounted on said latch actuator block, said latch handle being accessible through an opening in a bottom surface of said lower horizontal frame member, said latch handle being linked to a plunger to provide upward and downward travel of said plunger, said plunger being positioned for engaging a bottom end of said shot pin in response to locking actuation of said latch handle to thereby raise said shot pin into a position of engagement of a top end thereof with said latch socket block and to thereby secure said shutter door in said closed and locked position, said latch handle being concealed from view behind said lower horizontal frame member when said shutter door is in said closed and locked position, said latch handle being operative for unlocking actuation thereof to move said plunger away from engagement with said bottom end of said shot pin, thus permitting said shot pin to gravitationally move to a position of disengagement of said top end thereof from said latch socket block, thereby unlocking said shutter door, said latch handle extending below said lower horizontal frame member in a viewable position when said shutter door is unlocked.
16. A security shutter assembly as in claim 15, further comprising a corner hinge block mounted inside said upper and lower horizontal frame members at said end thereof that is proximate said selected one of said left and right vertical stiles, said corner hinge block being concealed from view within said upper and lower horizontal frame members, said corner hinge block having a protruding hinge pin mounted therein for matingly engaging openings at upper and lower ends of said selected one of said left and right vertical stiles of said shutter door.