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Mapped out potential root cause - Coggle Diagram
Mapped out potential root cause
Action items of Film Scroll Improvement
Fixed central axis to limit the free-movement
of Film Scroll
Slight interference between the central axis and the film roller
Move the roller closer to the outer sheath and control the angle of film going in
Reduce the Film Pulling Force
Replace the material of Film Scroll and roller PC/ABS or POM
Removal of the retaining walls gives the lowest trigger force
Backlash on the Film Scroll
Film coming out of the retaining wall
The film goes loose on the Film Scroll
Delays the rotation of Film Scroll
Loose film close to the retaining wall
Film came out of the retaining wall
When the film extrusion happens
If the Film Scroll picks up the rotation, then the extruded film could be retracted
If the extruded film is not retraced and the pulling of film continues, then the breakage of film occurs
The disks of Film Scroll get in contact with the retaining wall
The film goes up or down and wraps around the disk of Film Scroll
Film Scroll is not at the mid-level of trigger box
Issue of Film Scroll the irregular rotation
After the film being reeled on the Film Scroll, the total diameter would be: Max. 8.87 mm & Min. 5.9 mm
when the film is tensed: the angle going into the outer sheath becomes larger and the pulling force increases as the film goes less and less
Add tension to the Film Scroll for Preventing free rotation and film extrusion => insert a pin in the center of Film Scroll
Add mechanism to limit the rotation of Film Scroll (non-reverse motion & controlled advancement => new design or Film Scroll
Test of Craig,s of Film Scroll
Driving mechanism of film scrolling
Study of Driving Scroll
Use the gear set to drive the film
Film rubbing against the metal sheath
Change the location and find an proper angle of film going into the metal sheath without rubbing the film
Change the entering angle of film
investigate the IS-S and Study the effects on Cap
Film Climbing onto the positioning post
External force applied to push the short inner sheath & cap
Gap between the short inner sheath & cap after assembly
Viscosity of marking pen
Heated ink due to the light source