Thread a rope or strap over the exact center of the sensing roller, following the same path as the web material.
The actual tension continuously oscillates above and below the target setpoint.
from high-voltage or main circuit lines to avoid noise interference. M3.5 crimp terminals and tighten with a torque of 0.5 to 0.8 N·m.
Press and hold the MODE key for approximately 2 seconds to enter the programming menu. Select Parameter: Use the arrow keys ( ) to cycle through parameter codes (e.g., Pr.01 , Pr.02 ).
The manual explicitly warns: Span must always be set after Zero. Failure to do so will result in non-linear control. mitsubishi tension controller le 30 cta Manual
Industrial web tension control requires absolute precision to prevent material breakage, stretching, or slack. The is a high-performance, automatic tension control unit widely utilized in printing, packaging, paper converting, and textile industries.
Connect the ground terminal to a dedicated ground point (Class D grounding) to minimize electrical noise. Tension Detector (Load Cell) Input The LE-30CTA connects to Mitsubishi LX-TD load cells.
What you are controlling (clutch, brake, or AC servo motor?)
: Keep I/O and power cables at least 100mm away from high-voltage lines to avoid "noise" that can lead to tension spikes. Thread a rope or strap over the exact
Gradually increase the P-gain until the system reacts quickly without oscillating.
0 to 24V DC (for electromagnetic brakes/clutches), 4 to 20mA, or 0 to 10V DC 0°C to 55°C (free from freezing) Ambient Humidity 35% to 85% RH (non-condensing) Enclosure Rating IP20 (panel mount type) 2. Terminal Block Wiring Diagram
Control output (0-24V DC for magnetic powder clutches/brakes, 0-10V DC for feedback to VFDs/servo drives).
+-------------------------------------------------------------+ | MITSUBISHI LE-30CTA | | | | [ 150.0 ] -> Main Display (Tension / Parameter Value) | | ( kgf ) -> Unit Indicator LED | | | | (RUN) (STOP) (MANU) (AUTO) -> Status LEDs | | | | [ MODE ] [ SET ] [ UP ] [ DOWN ] [ RUN/STOP ] | | | +-------------------------------------------------------------+ Key Functions The manual explicitly warns: Span must always be
:
: Features a trigger input for ON/OFF time adjustments with a resolution as low as for minimal deviation. Connectivity
| Symptom | Likely Cause (via manual) | Solution | | :--- | :--- | :--- | | | Faulty sensor or excitation voltage missing | Measure between terminals 6 & 7; should be 5V DC. | | Tension reading drifts | Zero calibration not done after warm-up | Let unit run 15 min, repeat Zero/Span (Sec 5.2). | | Output always max | Broken analog output transistor or mis-set DIP switch for output direction | Check DIP switch #3. If correct, measure output at terminals 10-11. | | Erratic reading during acceleration | Incorrect damping setting | Increase "Damper" pot (labeled DAMP) per manual Section 7.3. | | "OL" on display | Overload – tension exceeds sensor range | Remove load. Check for mechanical binding. |