Needle Beds and their Elements
Construction: Needle beds
- The front needle bed is permanently screwed to the support of the needle beds.
- The rear needle bed can laterally be racked relative to the front needle bed by the racking device.
|
No. | Elements | No. | Elements |
|---|---|---|---|
1 | Holding-down jack | 5 | Selection jack |
2 | Needle | 6 | Selector spring |
3 | Coupling part | 7 | Needle bar |
4 | Intermediate slider | 8 | Cover rail |
The moveable parts (2) till (6) are fixed by multiple cover rails (8) in the needle bed.
I. Replacing needle and coupling part
- 1
- Open the needle rail (1) with extraction hook (6).
- 2
- Pull the needle (2) and coupling part (3) upward.
- 3
- Press the coupling part downward, when the butt of the coupling parts (4) bumps into the holding-down jack bed.
- 4
- Assemble the new needle and coupling part.
- 5
- Push the butt of the coupling part into the needle bed under the jack bed.
While doing so, make sure that the needle is guided in above the knock-over wire.
II. Replacing intermediate slider
CMS machines with a cam box distance of 6"
- 1
- Push the needle and coupling part (1) upward.
- 2
- Push the intermediate slider (2) until the lower butt bumps into the cover rail (3).
- 3
- Pull the upper butt of the intermediate slider out of the needle bed while pressing the lower butt into the needle bed and under the cover rail.
- 4
- Install the new intermediate slider in the reverse order.
- 5
- Slide the needle and coupling parts into the home position.
CMS machines with a cam box distance of 5" or 5.2"
To replace the intermediate slider, you need a pair of pliers.
- 1
- Push the needle and coupling part (1) upward.
- 2
- Using the pliers, pull the butt of the intermediate slider (2) upwards out of the needle bed.
- 3
- Install the new intermediate slider in the reverse order.
- 4
- Push the needle and coupling parts into the home position.
III. Replacing selection jack
- 1
- Push the needle upward with the coupling part.
- 2
- Push the intermediate slider (1) until the lower butt bumps into the spring wedge (2).
- 3
- Push the selection jack (3) upward until it bumps into the cover rail (4).
- 4
- Press the butt (5) of the selection jack into the needle bed and at the same time slide the selection jack further upward.
- 5
- Remove the selection jack.
- 6
- Install the new selection jack in the reverse order.
- 7
- Slide the intermediate slider in home position.
- 8
- Push the needle and the coupling part into the home position.