FY335 Threading Operators Manual
STEP 1
The thread stand and thread guide need to be parallel to each other for the correct tension to be maintained. The thread will move off the spool to the back of the guide feeding from back to front.
STEP 2
The thread will go thru the top hole then around the pin passing thru the bottom hole as shown in image above.
Step 3
The thread then passes thru the bottom tension guide opening as illustrated above.
Step 4
- Start from tension post to lower guide opening
- Through lower opening under rod
- Over and around ,pulled into top tension screw guide
- Down and around lower tension guide
- Over rod
- Under and around lowest tension guide
- Around guide all the way up past inter thread hook
- Up through thread guide upper
Closer view of operation 1, 2, and 3 from
Closer view of operation 4, 5, 6, 7, and 8.
Around guide all the way up past inter thread hook. Pulling thread all the way into guide groove.
(Another view of lower guide retainer)
(Another view of lower guide retainer)
Step 5
Through lower opening on thread take-up libra. Down past the left side of the libra cover.
Step 6
Down through felted thread guide
Passing through eyelet on the upper part of the center press shaft.
Finally, down the left side of the needle passing through from left to right the eye of the needle.
Pulling thread down thru center opening and to the rear of the presser foot
Adjustment
Adjustment
Please observe all notes from Chapter 1 Safety of the instruction manual! In particular care must be taken to see that all protective devices are refitted properly after adjustment, see Chapter 1.06 Danger warnings of the instruction manual!
If not otherwise stated, the machine must be disconnected from the electrical power supply. Danger of injury due to unintentional starting of the machine!
13.01 Notes on adjustment
All following adjustments are based on a fully assembled machine and may only be carried out by expert staff trained for this purpose.
Machine covers, which have to be removed and replaced to carry out checks and adjustments, are not mentioned in the text.
The order of the following chapters corresponds to the most logical work sequence for machines which have to be completely adjusted. If only specific individual work steps are carried out, both the preceding and following chapters must be observed.
Screws, nuts indicated in brackets ( ) are fastenings for machine parts, which must be loosened before adjustment and tightened again afterwards
13.02 Tools, gauges and other accessories for adjusting
- Screwdrivers with blade width from 2 to 10 mm
- Spanners (wrenches) with jaw width from 7 to 14 mm
- Allan keys from 2 to 6 mm
- Metal rule (part No. 08-880 218-00)
- Needle-rise gauge (part No. 61-111 600-01)
- Gauge, (top feed stroke 7 mm) (Part No. 61-111 633-61) Screw clamp (part No. 61-111 600-35)
13.03 Abbreviations
t.d.c. = top dead centre
b.d.c. = bottom dead centre
13.04 Explanation of the symbols
In this adjustment manual, symbols emphasize operations to be carried out or important information. The symbols used have the following meaning:
Adjusting the basic machine
13.04.01 Lateral positioning of the feed dog
Requirement: The clearances from the left and right of the bottom feed dog 1 to the needle plate cutout must be the same size.
Move the bottom feed dog 1 (screw 2) in accordance with the requirement,
13.04.02 Lengthwise positioning of the feed dog
Requirement: With the stitch length set at its longest the clearances behind and in front of the bottom feed dog 4 to the needle plate cutout must be the same.
- Set the longest stitch length
- Move the clamp piece 1 (screws 2) as far to the left as possible on the clamp surface 3 of the rock shaft. The left screw must still be on the clamp surface.
- Position feed dog 4 (screws 5) according to requirement.
13.04.03 Height of the bottom feed dog (only on machines with lifting phase – P-version)
Requirement: When the stitch length is set at “0”, in its highest position the bottom feed dog 4 should be 0.8 – 1.1 mm above the top edge of the needle plate.
- Set the stitch length at “0”
- Adjust eccentric 1 and 2(screw 3) in accordance with the requirement.
The bottom feed dog 4 should not touch cloth plate 5.
13.04.04 Centering the needle in the needle hole
Requirement: With the stitch length set at “0” the needle must enter the needle hole exactly in the middle.
- Unscrew the vibrating presser foot 1 and the presser foot 2.
- Set the stitch length at “0” and bring the needle to its tdc.
- Insert a new needle. Loosen screws 3, 4, 5 and 6.
- Bring the needle to a position directly over the bottom feed dog by turning the handwheel.
- Move the needle bar frame 7 in accordance with the requirement.
- Tighten screws 3, 4 and 5.
- Position stops 8 so that it is touching the needle bar frame 7 and tighten screw 6.
- The needle bar frame 7 in guide 9 and the vibrating presser drive shaft must move freely.
13.04.05 Pre-adjusting the needle height
Requirement: With the needle bar at its bdc the distance between the needle bar and the needle plate must be 15 mm.
- Move the needle bar 1 (screw 2) in accordance with the requirement without twisting it.
13.04.06 Driving motion of the top and bottom feed dogs
Requirement: With the longest stitch length set and the needle bar at its bdc the top and bottom feed dogs should not move when the reverse feed lever is activated.
- Set the longest stitch length.
- Loosen screw 1 far enough so that the feed driving eccentric 2 can be turned on the shaft with some difficulty.
- Bring the needle to its
- bdc.
- While keeping this position, move the feed driving eccentric 2 to the top and then move it slightly so that the requirement is fulfilled when the reverse feed lever is activated.
- Tighten screws 1.
13.04.07 Lifting motion of the bottom feed dog (only on machines with lifting phase – P-version)
Requirement:
- With the needle bar positioned at b.d.c., the bottom feed doc should be in the t.d.c. position.
- With the maximum stitch length set, when the balance wheel is turned the bottom feed dog should reach the needle plate surface at the same time as the needle point.
- Adjust eccentric 1 (screw 2) in accordance with the requirements.
13.04.08 Needle rise, hook-to-needle clearance and needle height
Requirement: With the stitch length set at “3” (1.8 mm after the bdc of the needle bar) the following must be correct:
- The hook point must be opposite the middle of the needle and the distance to the needle must be 0.05 – 0.1 mm.
- The top edge of the needle eye must be 0.8 mm from the hook point.
- Set the stitch length at “3” and loosen screw 1 and 2 (screw 2 is on the back of the machine)
- Set the needle bar at b.d.c. and place the 1.8 mm thick feeler gauge with its cutout close under the lower needle bar bearing.
- Remove the measuring plate and turn the handwheel in its direction of rotation until the screw clamp is touching the needle bar bearing.
- Move the hook on the hook shaft in accordance with requirement 1.
- Rotate the hook in accordance with requirement 2 (adjust needle height if necessary).
- Bring the hook shaft bearing 3 to rest on the hook and tighten screw 2.
- Taking care to ensure that the bevel gear 4 is resting on the bearing 5, tighten screws 1.
13.04.09 Vibrating presser lift
Requirement: With the vibrating presser lift at maximum and the stitch length set at “0”, presser foot 1 and vibrating presser foot 2 must lift 7.0 mm from the needle plate when the handwheel is rotated.
- Set the vibrating presser lift at maximum and the stitch length at “0”.
- Allow the presser foot 1 to rest on the needle plate.
- Turn the handwheel in its direction of rotation until the vibrating presser foot 2 has reached its highest point.
- Turn crank 3 (screws 4) in accordance with the requirement.
- Carry out a check.
13.04.10 Vibrating presser feeding motion
Requirement: With the presser foot 3 resting on the needle plate the vibrating presser 6 and the needle point must both reach the needle plate at the same time with the vibrating presser stroke at maximum.
- Loosen nut 1.
Slide bolt 2 upwards in the elongated hole and tighten nut 1.
- Allow the presser foot 3 to rest on the needle plate.
- Loosen screws 4 enough so that the feed lifting eccentric 5 can be rotated with difficulty.
- Rotate the lifting eccentric 5 in accordance with the requirement.
- Tighten screws 4. Carry out a check.
13.04.11 Needle thread tension release
Requirement: With the presser foot lifted, the two tension disks must be at least 0.5 mm apart. (The distance of 0.5 mm is the minimum clearance. The clearance can range up to more than 1 mm with thick thread.)
- Raise the presser foot using the hand lever.
- Align the compression plate 1 behind the tension bearing board 2 in accordance with the requirement. (When the tension is correct the release pin must be under pressure.)
13.04.12 Thread check spring
Requirement: The movement of the thread check spring must be finished when the needle point enters the material (= approx. 7 mm spring movement).
The length of the spring movement can vary a little upwards or downwards due to changes in the sewing parameters.
- Adjust stop 1 (screw 2) according to requirement.
- To adjust the pressure of the spring, turn screw 3 (screw 4).
13.04.14 Regulating the pressure on the presser foot
Requirement: The material must be fed perfectly even at top sewing speed. There must not be any pressure marks on the material.
- Turn screw 1 in accordance with the requirement.
