CARDING FAULTS ,CAUSES AND REMEDIES

                       TROUBLE SHOOTING

1.   FAULT  :  LIcker-in under case removing too many good

               fibres

     CAUSE  :  a. licker-in under case screen set too wide from

               the licker-in.

               b. Dull or incorrect type of taker-in wire

               c. Incorrect mote knife extension

     REMEDY :  a. See APPENDIX a for correct setting and reset

               b. Renew wire

2.   FAULT  :  licker-in under screen not removing enough trash

     CAUSE  :  a. Taker in under screen set too close to takerin

               roller.

               b. Feed plate set too far from taker in roller

               c. Incorrect mote knife extension

     REMEDY :  a & b. See APPENDIX a for correct setting and

               reset.

               c. Fit shorter extension

3.   FAULT  :  Excessive short/white fibres under taker in screen

     CAUSE  :  Incorrect knife setting

     REMEDY :  Check the trash knife/trash extractor setting.(See

               APPENDIX reduce setting if it necessary)     

4.   FAULT  :  Disappearing  web

     CAUSE  :  a. Under screen set too far from cylinder

               b. Dull or damaged doffer wire

               c. Dull or damaged stripping roller wire

     REMEDY :  a. See APPENDIX a for correct setting and reset.

               b & c. Grinding or replace the wire.

5.   FAULT  :  Web sticking to crush rollers

     CAUSE  :  a. Worn out or damaged scraper blade

               b. Insufficient tension on scraper blade springs

               c. Insufficient draft between crush roller and

                  calender roller.

               d. Crush pressure is too high.

               e. Relative humidity too high.

               f. Too many cotton seed particles

               g. Honey due aphis excrement in web.

     REMEDY :  a. Preventive action to be  taken

               b. Increase tension

               c. Set draft at high (material can accept)

               d. Reduce pressure.

               e. Relative humidity should be less than 48% with

                  dry bulb temperature 21c-26c (70F-80F) during

                  cotton processing.

               f. Clean edges of scraper blades frequently with

                  solvent to reduce RH%  

               g. Reduce or remove crushing action.(open crushing

                  roller setting for synthetic)

6.   FAULT  :  Excessive blow out at cylinder ends

     CAUSE  :  a. Incorrectly set under screen

               b. Lap too wide

               c. Card cylinder blades incorrectly set.

                  (particularly low front plate)   

               d. Dull cylinder wire

     REMEDY :  a. See APPENDIX a for correct setting and reset.

               b. Ensure lap width does not exceed 965 mm

               c. Correct settings and reset

               d. Grind and burnish the wire or renew if damage.

7.   FAULT  :  High nep count

     CAUSE  :  a. Incorrect setting of cylinder to flats,

                  cylinder to taker-in.  Especially revolving

                  flats post carding elements.

               b. Dull cylinder wire

               c. Dull or damaged flats

               d. Dull or damaged taker-in roller wire

               e. Web too thick (heavy)

               f. Extraneous matter, such as broken seed adhering

                  to the wires.

               g. Dirt wire surfaces, especially the cylinder

               h. Loaded cylinder

               i. Hooked wire

     REMEDY :  a. Check all setting in APPENDIX (Most important

                  flats setting)

               b. Strip, grind and brush as required.  The

                  sharpness of the doffer wire is as important as

                  the sharpness of cylinder wire.   

               c. Replace with new wire tops

               d. Taker-in wire must me sharp.  Clean free from

                  burrs and show no tendency to retain fibres in

                  the form of bands.  Such loading will

                  inevilable lead to strips of nep in the web,

                  must be rewired if dull or damaged.

               e. Check the web weight

               f. Brush or strip the wire.

               g. Brush or strip the wire.

               h. Check all setting and if the cotton is of low

                  grade.  Check wire specification is correct

                  (consult m/c makers for advice)

               i. Fibres will be retained on the metallic  wire

                  and loading, will result stripping, brushing or

                  grinding as required.