Tension Controls Dancer Control for Electric Brake Systems Specifications MCS-203 (P/N 6910-448-014) Input 24–28 VDC @ 3 Amps (from MCS-166, 1.5 amps for single (Shown with MCS-166; 3.0 amps from dual MCS-166’s) or other power Housing) source. Output Pulse width modulated 0–24 VDC for 24 volt Warner Electric tension brakes. Ambient Temperature –20° to +113°F (–29° to +45°C). External Inputs Dancer Potentiometer Provides the feedback signal of dancer position and movement for input to the control. Brake On Applies full current to tension brake. Brake Off Removes brake current and applies antiresidual current to eliminate brake drag. Useful when changing rolls. Antidrift Input Nullifies integrator portion of control for faster brake response. Important for splicing and mid-roll starting. The completely solid state MCS-203 Dancer Control Module is designed for Mounting Available for panel mounting with exposed wiring or wall/shelf automatic web tensioning through the mounting with conduit entrance. Must be ordered with either wall/shelf or panel enclosures. use of a dancer roll. The MCS-203 can control two 24 VDC tension brakes in Requires enclosure. See page 62. parallel. It works on the concept of a P-I-D controller and has internal P, I & D adjustments for optimum performance regardless of brake size. MCS-166 Power Supply, (page 61). Typical System Configuration The complete system consists of: The control unit maintains a current output to the tension brake based on an analog input 1. Tension brake or the manual setting of the control tension 2. Dancer tension control adjustment dials. Varying the current from 3. Control power supply the control creates more or less brake torque 4. Pivot point sensor for tension adjustability. 5. Dancer roll assembly (customer Sensor supplied) Brake Dancer Roll MCS–203 Control MCS–166 Power Supply 57 Tension Controls Dancer Control for Electric Brake Systems TCS-210 Specifications (P/N 6910-448-026) Input TCS-210 – 48 VDC @ 1.6 Amps continuous, 48 VDC @ 6 Amps (Shown with intermittent, 1.6% duty cycle, 30 sec. on time, 8–12 VDC @ 1.5 Housing) Amps. TCS-167 – 120 VAC, 50/60 Hz or 240 VAC, 50/60 Hz (Switch selectable). Output TCS-210/TCS-167 – 0–270 mA/magnet (running); 270–500 mA/magnet (stopping). Ambient Temperature –20° to +113°F (–29° to +45°C). External Inputs Dancer Potentiometer Provides the feedback signal of dancer position and movement for input to the control. Brake On Applies holding brake voltage. This closed loop tension control system Anti-Drift Input Nullifies integrator portion of control for faster brake response. Important at startup and for mid-roll starts. automatically controls tension on Brake Off Removes brake current and applies antiresidual current to unwinding materials such as paper, eliminate brake drag. Useful when changing rolls. film, foil, cloth and wire. Mounting TCS-210 – available as panel mounted with exposed wiring, or TCS-167 Power Supply, (page 61). wall/shelf mounted with conduit entrance. Note: When used with other than MTB mag- TCS-167 – available with open frame or wall/shelf mounted nets, a 68 ohm, 25 watt resistor must be enclosure with conduit entrance. added. Consult factory for details. Requires enclosure. See page 62. Typical System Configuration The complete system consists of five increases braking torque to elevate the components: dancer to the desired position, while reduc- ing brake current lowers the dancer. 1. Tension brake The closed loop dancer control system is 2. Dancer tension control completely automatic, limiting the need for 3. Control power supply operator involvement and the potential for 4. Pivot point sensor inaccurate tension control. The system offers Sensor 5. Dancer roll assembly (customer exceedingly rapid response that, in effect, supplied) corrects tension errors before they reach the The weight of the dancer roll or loading on work area of the processing machine. Brake the dancer determines the tension on the Dancer Roll web and the remainder of the system oper- TCS–210 Control ates to hold the dancer roll as steady as TCS–167 possible. When the dancer position Power changes, the Warner Electric pivot point Supply sensor tracks the direction and speed of the change and sends an electric signal to the closed loop control, which, in turn, relays a corrective signal to the Electro Disc tension brake. Increasing current to the Electro Disc 58