Automated dereeler
View Patent ↗An automatic dereeler includes a rocker arm that is movable between various positions to indicate the relative tension on a continuously supplied material. A sensor detects the rocker arm position which is transmitted to a controller. The controller actively controls a motor to either increase or decrease the resistive torque on a rotating axle that carries the continuous material.
1. An automated dereeler for feeding spools of continuous material into a machine, said dereeler comprising:
a housing rotatably carrying an axle, said axle having a first end, said axle carrying the spool of continuous material at said first end;
a motor mechanically interconnected to said axle;
a brake secured to said housing and positioned to continuously provide a constant braking torque to said axle;
a dancer arm pivotally secured to said housing and movable between a first position and a second position, said dancer arm including a spindle around which the continuous material is fed into the machine;
a spring assembly having a first end and a second end, said first end being secured to said housing and said second end being secured to said dancer arm, said spring assembly biasing said dancer arm toward said first dancer arm position;
a sensor adapted to monitor the position of said dancer arm;
a controller for controlling said motor and in communication with said sensor; and
wherein said controller causes said motor to resist rotation of said axle when said dancer arm is in said first dancer arm position, said controller causing said motor to aid rotation of said axle when said dancer arm is in said second dancer arm position.
2. The dereeler according to claim 1 wherein said dancer arm is movable to a third position, between said first position and said second position, wherein when said dancer arm is in said third position, said motor does not aid or resist rotation of said axle.
3. The dereeler according to claim 2 wherein said motor includes a maximum resistive torque, said controller causing an increase in resistive torque from said motor from zero when said dancer arm is at said third position to said maximum resistive torque when said dancer arm is at said first position.
4. The dereeler according to claim 2 wherein said motor includes a maximum aiding torque, said controller causing an increase in aiding torque from said motor from zero when said dancer arm is at said third position to said maximum aiding torque when said dancer arm is at said second position.
5. The dereeler according to claim 4 , wherein said maximum aiding torque is less than said constant braking torque from said brake.
6. An automated dereeler for feeding spools of continuous material into a machine, said dereeler comprising:
a housing rotatably carrying an axle, said axle having a first end, said axle carrying the spool of continuous material at said first end;
a motor secured to said housing and mechanically interconnected to said axle;
a brake secured to said housing and positioned to continuously provide a constant braking torque to said axle;
a dancer arm pivotally secured to said housing and movable between a first position and a second position, said dancer arm including a spindle around which the continuous material is fed into the machine;
a spring assembly having a first end and a second end, said first end being secured to said housing and said second end being secured to said dancer arm, said spring assembly biasing said dancer arm toward said first dancer arm position;
a sensor adapted to monitor the position of said dancer arm and transmit sensor data;
a controller for controlling said motor and in communication with said sensor, said controller including a processor, a storing unit for storing signals, and software program instructions which are stored in said storing unit and when executed by the processor cause the controller to perform a method comprising:
monitoring said sensor data;
causing said motor to resist rotation of said axle when said dancer arm is in said first dancer arm position, and
causing said motor to aid rotation of said axle when said dancer arm is in said second dancer arm position.
7. The dereeler according to claim 6 wherein said dancer arm is movable to a third position between said first position and said second position, said program instructions causing said motor to neither aid or resist rotation of said axle when said dancer arm is in said third position.
8. The dereeler according to claim 7 wherein said motor includes a maximum resistive torque, said program instructions causing an increase in resistive torque from said motor from zero when said dancer arm is at said third position to said maximum resistive torque when said dancer arm is at said first position.
9. The dereeler according to claim 7 wherein said motor includes a maximum aiding torque, said program instructions causing an increase in aiding torque from said motor from zero when said dancer arm is at said third position to said maximum aiding torque when said dancer arm is at said second position.
10. The dereeler according to claim 9 , wherein said maximum aiding torque is less than said constant braking torque from said brake.