1. Ürün Bittiview
This manual provides instructions for the Jack Bruce RA3 and RA4 series computer flat car electric control boxes and controller motherboards, specifically the Qixing (琦星款) and Baomai (鲍麦款, also referred to as Powermax) models. These components are essential spare parts for industrial sewing machines, designed to manage the electronic functions of the machine for precise and efficient operation.

Figure 1: Jack Bruce RA3/RA4 Electric Control Box (Qixing style on left, Powermax style on right)
The Qixing model typically refers to the complete control box unit, while the Baomai/Powermax model often refers to the internal controller motherboard. Both are critical for the electronic control of industrial flat car sewing machines.
2. Özellikler
| Özellik | Tanım |
|---|---|
| Ürün Türü | Sewing Machine Parts (Electric Control Box / Controller Motherboard) |
| Marka | Jack Bruce |
| Modeller | RA3, RA4 (Computer Flat Car), Qixing (琦星款), Powermax (鲍麦款) |
| Malzeme | Steel (for certain components/housing) |
| Kullanmak | Knitting (Industrial Sewing Machines) |
| Tür Ayarla | No (typically sold as individual components) |
| Yüksek endişeli kimyasal | Hiçbiri |
| Cilttage Uyumluluk | AC 220V (Confirmed by user query) |
3. Kurulum ve Kurulum
Önemli Güvenlik Bildirimi: Installation should only be performed by qualified personnel. Disconnect power to the sewing machine before beginning any installation or maintenance. Failure to do so may result in electric shock or damage to the equipment.
3.1 Identifying Your Model
Before installation, identify whether you have the Qixing control box or the Powermax (Baomai) motherboard. Refer to the images below:

Figure 2: Qixing Style Control Box (琦星款)

Figure 3: Powermax Style Controller Motherboard (鲍麦款)
3.2 Genel Kurulum Adımları
- Güç Bağlantısının Kesilmesi: Ensure the industrial sewing machine is completely unplugged from the power source.
- Erişim Kontrol Alanı: Open the designated control box compartment on your sewing machine. This may require removing screws or latches.
- Eski Bileşeni Kaldır: Carefully disconnect all wiring from the existing control box or motherboard. Note the position and connection of each wire, ideally by taking photos or drawing a diagram.
- Yeni Bileşeni Yükle:
- For Qixing Control Box: Mount the new control box securely in the compartment using the appropriate fasteners.
- For Powermax Motherboard: Carefully insert the new motherboard into its designated slot, ensuring all connectors align correctly. Secure it with any retaining clips or screws.
- Kabloları Yeniden Bağlayın: Connect all wires to the new control box or motherboard, matching them to the positions noted in step 3. Ensure all connections are firm and secure.
- Kapalı Bölme: Close and secure the control box compartment.
- Güç Bağlantısı: Plug the sewing machine back into the power source.
- İlk Test: Turn on the machine and perform a basic function test to ensure the control box/motherboard is operating correctly.
4. Kullanım Talimatları
The Jack Bruce RA3/RA4 control box and motherboard are integral to the sewing machine's electronic functions. Their operation is typically managed through the machine's main control panel. This section provides general guidance.
4.1 Açma/Kapatma
- To power on the machine, flip the main power switch, usually located on the control box itself or the machine's main body.
- To power off, flip the switch back to the 'off' position.
4.2 Temel İşlevsellik
Once powered on, the control box/motherboard enables various functions of your industrial sewing machine, including:
- Motor hız kontrolü
- Needle positioning
- Stitch pattern selection (if applicable)
- Automatic thread trimming (if applicable)
- Error code display (via the machine's display panel)
Refer to your specific sewing machine's user manual for detailed instructions on how to operate these functions through the machine's interface.
5. Bakım
Proper maintenance ensures the longevity and reliable performance of your electric control box/motherboard.
- Temiz tut: Regularly clean the exterior of the control box and the surrounding area of the motherboard to prevent dust and lint buildup. Use a soft, dry cloth. Avoid using liquids directly on electronic components.
- Havalandırma: Ensure that the ventilation openings on the control box are not obstructed to prevent overheating.
- Bağlantıları Kontrol Edin: Periodically inspect all wiring connections for looseness or signs of wear. Tighten any loose connections.
- Çevresel Koşullar: Operate the sewing machine in a clean, dry environment, free from excessive humidity, dust, and extreme temperatures.
6. Sorun Giderme
Bu bölümde, sık karşılaşılan sorunlar için temel sorun giderme adımları verilmiştir. Daha karmaşık sorunlar için yetkili bir teknisyene danışın.
| Sorun | Olası Neden | Çözüm |
|---|---|---|
| Makine açılmıyor | No power supply, loose connection, faulty power switch. | Check power cord, wall outlet, and all internal connections. Ensure the power switch is in the 'on' position. |
| Machine powers on but functions are erratic | Loose wiring, component malfunction, software issue. | Check all internal wiring connections. Power cycle the machine. If issues persist, professional diagnosis may be required. |
| Error code displayed on machine panel | Specific machine fault detected by the control box. | Refer to your sewing machine's specific manual for error code definitions and solutions. |
| Overheating of control box | Blocked ventilation, excessive load, environmental factors. | Ensure ventilation openings are clear. Reduce continuous heavy load if possible. Check ambient temperature. |
7. Kullanıcı İpuçları
- CilttagKontrol edin: Always confirm that your power supply matches the 220V requirement of the control box to prevent damage.
- Profesyonel Kurulum: Due to the sensitive nature of electronic components and the high voltage involved, it is highly recommended to have these parts installed by a professional sewing machine technician.
- Uyumluluk: Ensure you select the correct model (Qixing or Powermax) that is compatible with your specific Jack Bruce RA3 or RA4 computer flat car sewing machine.
8. Sıkça Sorulan Sorular (SSS)
- Q: Can this PC board be used with AC 220V (e.g., in Malaysia)?
- A: Yes, the control box/motherboard is designed to operate with AC 220V power supply.
- Q: Is this control box compatible with other brands of sewing machines?
- A: This product is specifically designed for Jack Bruce RA3 and RA4 computer flat car industrial sewing machines. Compatibility with other brands or models is not guaranteed and should be verified by a professional technician.
9. Garanti ve Destek
For warranty information, technical support, or service inquiries, please contact your original point of purchase or an authorized Jack Bruce service center. Keep your purchase receipt as proof of purchase.