Troubleshooting Guide for Computerized Heat Shrink Tubing Cutters

Troubleshooting Guide for Computerized Heat Shrink Tubing Cutters

Introduction:

Computerized heat shrink tubing cutters offer a convenient and efficient solution for cutting tubing in various industries. However, even these advanced machines can encounter occasional issues. This guide, a leading manufacturer of automatic tubing cutting machines, equips you with solutions for common problems you might encounter with your computerized heat shrink tubing cutter.

Troubleshooting Startup Issues:

Alarm at Startup:

Cause: Inertia of the upper cutter results in a large starting torque, triggering an overload alarm.
Solution:
Turn off the machine and loosen the screw adjusting the cutter slide rail.
Start the machine and adjust the screw for appropriate tightness while operating.
Turn off and on again to confirm.
If the issue persists, open the front cover and rotate the eccentric wheel to change its position.
Normal Startup, Alarm During Operation:

Cause: Tightness or wear on the cutter slide rail causing overload during operation.
Solution: Refer to solutions for “Alarm at Startup” (points 1 & 3).
Understanding Common Alarm Faults:

Batch Pause: Intermittent buzzer sound indicates batch pause. The buzzer automatically stops when the pause time ends.

Abnormal Cutting: Intermittent buzzer and “Knife Abnormal” message on screen. Press “Stop” to silence the buzzer. This indicates a cutting issue.

Shutdown Button Inoperative:

Cause: Program error.
Solution: Turn off the power, restart the machine, and perform a factory reset (consult your machine’s manual for specific steps).
Stepper Motor Issues:

No Motor Rotation:

Cause: Pressing “+” or “-” keys doesn’t trigger forward or backward movement.
Solution: Check connections between the motherboard and stepper driver. If faulty, contact the vendor.
One-Direction Rotation:

Cause: Stepper motor driver is direction-pulse type, only rotating in one direction. This indicates a problem with the driver’s direction signal or the driver itself.
Solution: Verify connections between the motherboard and stepper driver. If faulty, contact the vendor.
No Rotation in Either Direction:

Cause: No power indication on the stepper driver.
Solution: Check connections between the driver, motherboard, and stepper motor. If the issue persists, contact the vendor.
Cutter and Feed Wheel Issues:

Cutter Operates, Feed Wheel Doesn’t:

Cause 1: Program error. (Refer to solution for “Shutdown Button Inoperative”).
Cause 2: Broken triangular belt on the feed wheel drive transmission.
Solution: Check the belt and replace it if necessary.
Inconsistent Cut Lengths:

Causes:
Improper pressure roller adjustment (adjust pressure based on material elasticity).
Dirty or contaminated feed wheel.
Worn-out feed wheel (use grooved steel wheels for harder materials).
Excessive resistance from the material rack (consider a homemade rotating rack).
Uneven Cutting with Burrs:

Cause: Worn-out cutter.
Solution: Replace the cutter. Old cutters can be reused after grinding.
Failure to Feed:

Cause: Loose slide rail causing the upper cutter to obstruct the feed.
Solution: Tighten the adjustment screw slightly to raise the cutter’s stopping position.
Start Button Not Working:

Cause: Counting might have reached the set production value.
Solution: Clear the count and restart.
Abnormal Noise:

Cause 1: Severe wear on the slide rail causing the cutter frame to swing.
Solution: Replace the slide rail and cutter frame.
Cause 2: Vibrating pressure roller.
Solution: Wrap tape around the pressure roller shaft head to eliminate the horizontal radial gap.
Conclusion:

By understanding these common issues and their solutions, you can maintain optimal performance and extend the life of your computerized heat shrink tubing cutter. Remember, for complex problems, consulting the user manual or contacting the vendor is always recommended.