Help for seamstresses: Horizontal hook machine settings
Most sewing machines are equipped with a classic vertical hook. It consists of the bobbin case and the bobbin itself, which are inserted into the hook, located vertically in relation to the platform of the sewing machine. Machines with a vertical hook are more familiar, many seamstresses know how to insert it and adjust the lower thread tension. But there are other machines that have a horizontal hook. It looks unusual because it has no bobbin case and the spinning bobbin is in plain sight. This type of shuttle device has its supporters, who are attracted by the ease of threading and almost silent operation of this design.
Causes of faulty stitch formation in the stitching
Missing stitches. The most common cause of skipped stitches in any sewing machine is the lack of “sure” capture of the loop of needle thread by the spout of the hook or loopers. Adjusting this sewing machine setting always requires experience, especially overlocks. Forming a loop near the eye of the needle occurs when the needle is lifted from the lower position by about 1.8. 2.3 mm. The hook or hookstick nose should be just above the eye of the needle at this point and almost flush with the needle blade. Since it is not always possible to perform a quality adjustment of these parameters with your own hands, we recommend that you only check them. This will allow you to determine that the cause of the skipped stitch may be related to another malfunction. The compensating spring may have an influence on the appearance of a skip. Blunt hook nose. When the thread number does not match the size of the eye of the needle (too thick thread). Large (broken) hole in the needle plate. When too thick a needle is used for thin fabric. Loose needle in the needle bar. Incorrectly installed needle. Excessive looseness in the units and mechanisms of the machine. Defective needle.
Upper and lower thread breaks. The most common causes of thread breaks can be: fraying of the thread; cutting of the thread by a sharp edge in the workpiece; thread pinched, caught, etc.п. To find where thread breaks occur, the entire thread path must be examined (with a magnifying glass, if possible). Probable causes of thread fraying may be: roughness of thread guiding and contacting surfaces in the area of thread breakage; too much thread tension; reduced strength of the thread due to its unwinding. See. Also: Causes of skipped stitches in a sewing machine Sewing stitches. Thread breakage Industrial sewing machine 1022 class Troubleshooting sewing machine repair, adjustment overlocks with their own hands How to organize a sewing shuttle
Sewing machine handwheel does not turn
You decide to sew a new skirt, take out the machine, press the foot pedal. The unit has hummed, but the flywheel does not crank. The first thought that might come into your head is to hand crank the wheel. And that’s the worst thing you could do. The use of force when the handwheel does not go easily can at best break the needle, and at worst, one of the most important parts in the mechanism. Its repair will not be cheap.
The sewing needle does not work or does not move, why??
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If the needle does not rise or falls in the sewing machine, then the sources of failure can be several (from seizing due to formed rust or dirt to the failure of the needle barrier). Malfunctions subject to both inexpensive domestic machinery (Aurora, Podolsk), and products of famous manufacturers (Juki, Astralux, Singer, Jaguar, Husqvarna). A qualified specialist will be able to determine the type of failure and repair the machine.
The engineers of “A-Aisberg” United Service Service Company repair sewing machines of all companies regardless of the model and year of manufacture. Diagnostics and troubleshooting are made at home in the presence of the client, and the equipment is not taken to the service center. Long-term experience and detailed knowledge of different brands allow us to eliminate 99% of failures during a single visit. To call a master, call 8 (495) 213-33-33 from 7:00 to 23:00 (daily).
Why the needle can jam
As with any other machine, Brother, Astralux, etc. Requires regular maintenance and proper operation. One of the most important conditions for their good work is regular cleaning of all elements. This must be performed after each use. When sewing, a lot of fine dust and fabric frizz is generated, this debris gets into the lumen of the moving elements and mixes with the service oil. This viscous substance can complicate the needle, the needle will stop, further work becomes impossible.
If the needle does not rise in the sewing machine, it may be due to infrequent use of technology. This applies to old Podolsk and Singer units, especially if they have been stored in a damp room. In that case the parts might get damp and rusty. This will cause the needle bar to become jammed. To bring the machine back to life, you can carefully grind the axis with the finest sandpaper and lubricate well with machine oil. If you grind with coarse abrasive, the rust may return.
Why the hook will not rotate (Chaika)
Sometimes, from unskillful adjustment of the node and bad tightening the screws gear shuttle sewing mashanika Chaika, stops rotating shuttle. There are two screws, they are wide and flat, but the photo only shows an empty screw hole. And if you lose them, it is impossible to replace them with others. Be careful and do not unscrew any parts which you are not sure of.
Attachment of the vertical shuttle to the shaft
In this article, we will look at how to adjust the vertical rotary hook. You may need to adjust the hook after sewing heavy, coarse fabrics, materials. Screws that press the shuttle to the shaft may not hold the load on the shaft and the shuttle will move. Therefore, try not to overload the household machine by sewing fabrics not intended for it.
It should also be noted that not all sewing machines can do it practically (shuttle shift on an axis), because often in the place of pressing the shaft with a screw chamfered. Not all machines have this, but keep it in mind when looking for the cause of skipped stitches. By the way, I hope that this article is read by a trained person, so I will omit many of the nuances, such as removing the needle plate to see the fixing of the shuttle.
There are usually two screws, but there are more, especially for industrial machines. By the way this material on the adjustment of the shuttle stroke can be used to adjust any household and even industrial machines. True, without fine tuning, but only as a material explaining the general principle of any shuttle.
How to fix a heavy stitch
Ways to eliminate the tight mobility of Janome, Husqvarna, Aurora, Podolsk devices will depend on the source of failure.
Lubricate with the spindle oil recommended by the machine manufacturer.
Grease parts with an unsuitable lubricant.
Treat moving parts with WD-40 fluid or a 1:1 mixture of solvent and technical oil. Remove the remaining dirt with a cloth. Apply spindle grease.
Dismantle the shuttle and clean it of debris. Grease the mechanism.
Threads wrapped around the moving parts of the machine.
Clean any rusty areas with metal solvent. Lubricate the system.
They need to have a backlash of up to 0.5 mm to rotate freely.
Adjust the force with which the presser foot presses the fabric.
Remove the needle plate. Adjust the slat position.
These are the most common causes that cause the unit to slow down. Some of them can be corrected by yourself, for example, clean the equipment from dirt and other debris and lubricate well. But most malfunctions can only be corrected by a professional technician.
Stiff sewing machine movement.
It is difficult to rotate the shaft of the hook pusher, because the crank is pressed without axial clearance, rust in the bearings, lubrication with vegetable oil, etc. п.
There should be 0.05 mm of axial play on the shaft of the hook pusher. It may not be felt by hand. If you can feel it and at the same time the shaft is rotating tightly, grease it with solvent 47 and machine oil I8A in a 1:1 ratio. If there is no axial clearance, using a three-edged file, tap lightly on the shaft end at the side with a hammer
Sometimes it is necessary to flush the machine with kerosene, dropping it in all the grease spots. Then let the machine run for about 5 minutes. Then put grease in all the places, work on the machine, then wipe the entire machine to dry with a rag (soft cloth). Oil should only be between rubbing parts.
Loosen the drive belt on the machine (refer to the section “Drive belt”). Chapter. 2 “Foot Drive”)
Small shaft with rocker arm should rotate unevenly. Reasons: no axial clearance, shaft lubricated with vegetable oil, corroded, tightened in cones and no axial clearance
If necessary, carry out the adjustments indicated in point “1” or loosen the shaft. If necessary, carry out the adjustments indicated in item 1, or loosen the shaft in the cones. Shaft play should not be felt by hand, but should rotate easily
Other shafts under the platform are tightened too much. All shafts in the machine must have a floating clearance of between 0,05. 0,1 mm
Adjust the clearance at the shaft tapers. Loosen cone locknut with a 14mm ring spanner, then loosen it with a screwdriver to the required axial clearance (barely perceptible by hand). Hold the cone with a screwdriver to prevent it from turning and tighten the lock nut with a wrench. Lubricate joints with I8A oil
The machine should be set so that there is no backlash and it runs smoothly. All screws are then torqued, stamped and painted to prevent self-torquing.
The main crankshaft is rotating hard (see causes for details). in item. 3)
First, lubricate the crankshaft bearing with the grease specified in P. 1. If the shaft does not rotate easily after lubricating with the compound, adjust the axial clearance. To do this, remove the manual drive (if any) and the friction screw and, holding the end of the shaft thin end of a triangular file, hit it 2-3 times with a hammer. The shaft should now rotate easily. Sometimes you have to do the same on the left end
You can use the above method, but instead of a file, use a punch or gouge.
There are pressed up hairs, threads, etc. in the annular groove of the hook housing. д.
Clean any soiled areas. To do this, hinge the machine, disassemble the hook device. remove the bobbin case, leaf spring, lock ring, hook. Clean the groove in the rotary hook housing. Carry out such work daily at the end of the working day
Singer 20U-109 Jammed Fixes
Lubricate with the grease specified in item “Lubricate”. 1. Further lubricate only with I8A or I20A oil. The type of oil is determined by the machine designer. The speed of rotation of the part, the torque, the temperature inside the bearing and the environment, and other factors are taken into account. Change of oil is the most serious violation of machine operational conditions.
Do not use old oil either.
Heavy foot pedal travel or other moving parts in the foot-operated actuator (for causes, see “Foot-operated actuator”). in item. 3)
Adjust as described in point “3. 1 and 4 (and see also under “Lubrication and oil change”). cl. 2) “Foot drive”)
Loosen the presser bush (top left). If this does not help, remove the cylindrical pressure spring from the presser foot and shorten it by four coils with wire cutters. Use a spring with its shortened end facing downwards. Adjust the presser foot pressure on the fabric
Usually the spring has to be stretched.
Fabric motor rail is warped and hard to move in the slot in the needle plate
Remove the needle plate, loosen the two screws securing the rack and achieve the correct position
Driver Rotation on a Sailrite Ultrafeed Sewing Machine
The teeth of the battens must be parallel to the slit in the needle plate.
No grease in the joints and other mating parts of the machine. The machine makes a loud characteristic noise. It is not permissible to leave the machine in the porch or apartment by the window, in a humid corner, by the front door or the balcony
Lubricate the machine periodically. The lubrication period depends on how long the machine has been in operation. Other reasons also influence the frequency of lubrication: oil quality, storage conditions, temperature, air humidity, dustiness, location and finally whether all the rubbing surfaces have been lubricated the previous time. Specific recommendation. If sewing on an occasional machine, lubricate it once every two months. If working daily. once a week. If the machine is sewn on very infrequently, before work.
Clean and lubricate machine every 8 hours of operation. Caning device by the sound, a special oil for hooks.
Crank pin misalignment on the crankshaft in the lower mount. Detach connecting rod from small shaft to determine misalignment
correct misalignment by moving the small shaft to the right or left (with respect to the connecting rod)
Sticking in the meshing of the manual drive gears. Most often the cause may be threads wrapped around the hub of the small idler. Sometimes axles of both pinions, especially the big one, self-loosen, loosen, loosen at the fixing points (threaded hole)
Find out the cause of jamming and eliminate it. Remove wound threads. If there is misalignment of the pinion axis, lightly tap with a hammer on the axis of the small pinion from the side of jamming. Check that both pinions are secure and periodically tighten the pinion screws firmly
Seizing of bevel gears on zigzag machines. Reason. unacceptably small gap between teeth.
Adjust the pinion clearance. To do this, loosen the two screws fixing the bushings (see “Fixing the bushings”). Fig. 7-9 and 13) and displace the shaft 12 (see the section with toothed sector). Fig. 7) From sector gear 8 to the right to the value of clearance equal to 0,1 mm. Turn the handwheel to determine if the sector wheel is jammed in any of the positions
This means the toothed sector and gear of the shuttle device. In this connection, thick grease such as “Lithol” is possible. Noise decreases.