08.07.2020
Sewing machine husqvarna 250 electronic technical capabilities. Sewing machine Husqvarna Practica. More modern model Husqvarna Practica II
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Manual Husqvarna 250 R
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Summary
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In our country, Husqvarna sewing machines are mainly represented by new modern models that can be bought in stores. But sometimes you come across old cars from the Swedish brand Husqvarna, produced only for the European market. And sometimes even unique first models with electric drive, produced by this concern in the mid-19th century.
Exactly for such a rare model sewing machine and is the subject of this article. Its full name is "Husqvarna Practica" Type 40 4010. Made in Sweden.
Later, on the basis of this model, other modifications were created, called Viking, and therefore some of the materials in this instruction manual are suitable for them.
IN in brief the possibilities of repairing, setting up and adjusting the sewing machine are also considered Husqvarna machines old model with your own hands.
This photo clearly shows what the assembled Husqvarna Practica looks like, along with a removable table. This is a fairly convenient design solution that expands the capabilities of the machine. Despite its age, this machine has many attractive features. One of them is an excellent, strong, removable table, the second - the machine is made entirely of metal. In addition, it has a reliable electric drive and pedal, and provides numerous “fine” settings for the operation of the sewing machine, which are no longer used in modern models. But more on that below; first, let's look at the diagram with the names of its parts and components.
Names of parts and control levers Husqvarna Practica
1. Upper thread guide. The eyelet into which the upper thread is inserted. 2. Eye (hole) of the upper thread take-up lever.
4. Upper thread tension regulator.
5. Front front panel.
6. Thread guide.
7. Compensation spring.
8. Wire guide for the upper thread.
9. Needle bar.
10. Foot fastening screw.
11. Universal foot (zigzag).
12. Reach of the sleeve of the lower part of the machine.
13. Bobbin case.
14. Shuttle mechanism.
15. Shuttle mechanism compartment cover.
16. Sewing machine bed.
17. Needle holder clamping screw.
18. Presser foot raise/lower lever.
19. Sewing needle.
20. Tissue motor rack.
21. Needle plate.
22. Lamp for illuminating the working surface.
23. Protective mesh for lamp bulb.
24. Lamp switch.
25. Flywheel.
26. Appearance of stitches (for Husqvarna Viking models).
27. Selected stitch indicator.
28. Sewing machine reverse button (tack).
29. Stitch length switch.
30. Stitch selection switch.
31. Selection mark.
32. Zigzag stitch width regulator.
33. Rear front cover.
34. Button to turn off/on the operation of the fabric motor (rack teeth).
35. Thread guide for bobbin winding.
36. Hole for fixing the fastening of the removable table.
38. Turning on the thread winder. More modern model Husqvarna Practica II
Almost the same machine, only the handles for selecting stitches, stitch valleys and turning on the zigzag have become more convenient.
The main feature of the Husqvarna Practica sewing machine is its connected copiers. This is a rather inconvenient and outdated solution for switching the machine to one line or another. In subsequent models, this design element was replaced with a conventional handle mounted on the front side. 
This is what the copiers for the Husqvarna Practica sewing machine look like. You need to insert it into the slot at the back of the machine. Moreover, the machine will execute the line appearance which is indicated on the copier. To select another line, you need to switch the position of the copier line selection regulator or install another copier (A, B, C). Malfunctions and repairs of Husqvarna sewing machines
The “main” part of this model of sewing machine is the belt connecting the upper shaft to the lower shaft. This is a woven textile strap with metal links. Due to age, temperature changes and other factors, it can stretch out and then the machine can no longer be repaired, and it is impossible to buy a new belt. 
It is advisable to remove the shuttle stroke, clean and lubricate it. To remove the stroke, you need to remove four screws and remove the square metal frame that holds it in the grooves. Stitch selection and other options
This photo shows a close-up of the lever to move the needle relative to the center of the needle hole. This is often necessary when sewing in a zipper. Paired with it is a zigzag stitch width regulator.
Next to this lever there is a lever that controls the operation of the copier. Depending on which number is selected on it, the line on the copier will be selected.
The Husqvarna Practica bobbin case looks different from other machines, but its operating principle is similar. 
The two screws shown in this photo hold the flat spring, and one of them also simultaneously regulates the clamping force of the bobbin thread. 
Avoid making nicks on the heads of these screws and adjust the thread tension in the bobbin case less frequently.
This machine has a very reliable and comfortable pedal. 
Even if your machine does not work, then keep the pedal, since it can be connected to any other electric machine or overlocker (almost any). 
Suitcase for storing a Husqvarna Practica sewing machine.
Japanese sewing machine brands: Janome, Juki, Brothers, Toyota and Jaguar. In addition to Japanese brands of sewing machines, there are many more European manufacturers, American companies, Asian and other countries.
