Needle Bar Height - Singer Futura Quartet FQ-4 Service Manual

1. Needle bar height

A
Check
Note: ALWAYS check the Needle Height before checking the following settings
"Needle timing to hook" and "Feed-dog timing (vertical motion) "
Check 1
The check 1 is done with a gauge which is 28.95 mm long.
1. Remove needle plate and bobbin case.
B
2. Select straight stitch (center needle position).
28.95 mm
3. Replace needle with the special needle gauge.
Ref. No 412 35 29-02 C
4. Bring the needlebar into its lower turning position.
6. The distance between the upper end of the needle and the
surface (B) of the hook ring should be 28.95 (+/- 0.05 mm).
5. Check this by push on the tip (B) of the Special needle
gauge, and it should just touch the upper part of hook
ring(C).
Check 2
Use a # 90.
1 .Set needle at straight stitch and at its highest position.
2. The distance between top of needle plate and a tip of needle should be
14.6-15 mm
Adjustment
14.6-15mm
The setting is done with a gauge which is 28.95 mm long.
1. Remove face cover
2. Bring the needle bar to its highest position, from the front , loosen set screw (A) and retighten it lightelly.
3. Bring the needle bar to its lower turning position.
4. Move the needle bar until the correct distance is obtained, the tip of needle must be fl ush with hook ring.
5. Tighten set screw (A).
6. Check by means of a twin needle that the needle bar is not twisted, it may cause jump
stitches when sewing with a twin needle.
7. Check also so the needle threader operates correctly
NOTE! This setting affects:
2. Needle threader height
5. Feed-dog timing (vertical movement)
12. Needle timing to hook
A
Singer Futura XL-400 , FQ-4 5