– 97 –
1-5) Feeding is inappropriate.
5-A) Too high feed dog causes
Lower the height of the feed dog (0.8 mm for standard size,
jumping at high speeds.
1.2 mm for B-SH) or increase the pressure to prevent the
material from jumping.
5-B) The tip of the feed dog is worn.
Sharpen the tip of the feed dog with a diamond file or the
like, or replace the current feed dog with new one.
5-C) The pitch of the feed dog is too
Replace the current feed dog with a new one having a
large.
smaller pitch.
5-D) The inclination of the feed dog
Change the positions of the top and bottom feeder bar pins
is inappropriate.
nd make the tip side of the feed dog higher to perform
the material pulling function effectively.
5-E) The parallel level of the feed dog
Replace the current feed tooth with new one.
is inappropriate.
5-F) The feeding speed is too high.
Reduce the feeding speed.
5-G) Others
Use a small gauge for a gap between the throat plate groove
and feed dog in the moving direction without interference
with the movement of the feed dog when a feeding pitch
is small.
2. Uneven material feed
2-1) Feeding is inappropriate.
1-A) The height of the feed dog is
Lower the height of the feed dog (0.8 mm for standard size,
too high.
1.2 mm for B-SH) or increase the pressure to prevent the
material from jumping.
1-B) The feed trace is inappropriate.
Adjust the timing of the vertical feed cam with reference to
3.-4) Feed trace and phase.
1-C) The tip of the feed dog is worn.
Sharpen the tip of the feed dog.
1-D) The pitch of the feed dog is too
Use a feed dog with a smaller pitch.
large.
1-E) The inclination of the feed dog
Make the tip of the feed dog lower.
is inappropriate.
From the previous page
Trouble
Case (1)
Case (2)
Check and Corrective measures
To the next page
Summary of Contents for DDL-9000B-DS
Page 14: ... 10 4 Feed locus and phase 1 Timing standard 2 Timing fast 3 Timing slow Standard Adjustment ...
Page 32: ... 28 8 Adjustment of the amount of feeding 4 Optional switch Standard Adjustment ...
Page 58: ... 54 11 Thread trimming unit 8 Replacement of the moving knife Standard Adjustment ...
Page 70: ... 66 12 Adjustment of the wiper DDL 9000B WB 2mm 1mm Standard Adjustment ...
Page 112: ...MEMO ...