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Summary of Contents for Alfa Network A1925
- Page 1 INSTRUCTION MANUAL Industrial straight stitch machine MODEL A1925...
- Page 2 IMPORTANT SAFETY INSTRUCTIONS To get the most out of the many functions of this machine and operate it insafety,it is necessary to use this machine correctly. Please read this Instruction Manual carefully before use. We hope you will enjoy the use of your machine for a long time. Please remember to keep this manual in a safe place.
- Page 3 FOR SAFE OPERATION 1. To avoid electrical shock hazards, neither open the cover of the electric al box for the motor nor touch the components mounted inside the electric al box. 1. To avoid personal injury, never operate the machine with any of the belt cover, finger guard of safety devices removed.
- Page 4 Precautions Prior to Startup 1. The machine head is coated with a thick layer of rust-prevention grease before encasement, and the encased machine head may possibly be subjected to grease hardening and dust buildup on the machine surface in process of long storage and long-haul traffic; therefore, take care to remove the grease and dust from the surface using soft cloth and gasoline.
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Page 5: Table Of Contents
TABLE OF CONTENTS MACHINE SPECIFICATIONS ..............1 INSTALLATION ..................1 2.1. Installation ........................1 2.2. Machine head ....................... 2 2.3. Cotton stand ......................... 2 LUBRICATION ..................3 THREADING THE UPPER THREAD ............4 ADJUSTING THE NEEDLE AND ROTARY HOOK TIMING ....4 ADJUSTMENT OF THE PEDAL .............. -
Page 6: Machine Specifications
1. MACHINE SPECIFICATIONS 310M 310H Medium-weight materials Heavy-weight materials MAX. Sewing speed 5000sti/min 4000sti/min MAX.Stitch length Presser lifting lever 5.5mm foot Knee lifter 13mm height automatic 9.5mm Feed tooth height 1.0mm 1.2mm Needle DBx1 9#-18# DPx5 18#-22# Lubricant NO.10 White oil 2. -
Page 7: Machine Head
2.2. Machine head ①. Machine head ②. Hinges (2pcs) ③. Frame support bar 2.3. Cotton stand ① Cotton stand NOTE： Securely tighten the nut ④ ,so that the two rubber cushions ② and washer ③ securely clamped and so that the cotton stand ①... -
Page 8: Lubrication
3. LUBRICATION WARNING: Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 1) Fill oil pan ① with Machine Oil up to HIGH mark A. 2) When the oil level lowers below LOW mark B, refill the oil pan with the specified oil. 3) When you operate the machine after lubrication, you will see splashing oil through oil sight window ②... -
Page 9: Threading The Upper Thread
4. THREADING THE UPPER THREAD CAUTION Turn off the power switch before threading the upper thread. The machine may operate it the treadle is depressed by mistake, whic h could result in injury. Turn the machine pulley and raise the thread take-up ①... -
Page 10: Adjustment Of The Pedal
6. ADJUSTMENT OF THE PEDAL CAUTION Turn off the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 1. Adjusting the angle of treadle 1) Adjust the angle of treadle only by adjusting the length of treadle connecting rod: unscrew screw ①, and adjust the length of treadle connecting rod by moving upward/downward... -
Page 11: Standard Adjustment
6.1. Standard adjustment CAUTION Maintenance and inspection of the sewing machine should only be carried out by a qualified. Ask your dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system. If any safely devices have been removed, be absolutely sure to re-install them to their origin positions and check that they operate correctly before using the machine. -
Page 12: Adjustment Of The Height Of Feed Dog
6.3. Adjustment of the Height of feed dog 1. Turn the pulley until the feed dog rises to the highest position. 2. Turn over the sewing machine head on the supporting bar. 3. Unscrewing the tightened screw ① in thefeed lifting crank ②. 4. -
Page 13: Adjust The Lean Of Feed Dog
6.4. Adjust the lean of feed dog 1. Turn the pulley until the feed dog ④ rises to the highest position. 2. Turn over the sewing machine head on the supporting bar. 3. Unscrewing the tightening screw ① in the teeth pedestal ②. -
Page 14: Adjusting The Tension Of Stitch Thread
7. ADJUSTING THE TENSION OF STITCH THREAD CAUTION Turn off the power switch before removing or inserting the bobbin case. The machine may operate of the treadle is depressed by mistake, which could result in injury. Upper thread Lower thread Upper thread tension too weak or Lower thread tension too strong Upper thread tension too strong... -
Page 15: Adjusting Thr Amount Of Oil (Oil Splashes) In The Hook
8. ADJUSTING THR AMOUNT OF OIL (OIL SPLASHES) IN THE HOOK WARNING Be extremely careful about the operation of the machine since the amount of oil has to be checked by turning the hook at a high speed. ① ② Amount of oil (oil splashes ) Position to confirm the amount of oil confirmation paper... -
Page 16: Pedal Pressure And Pedal Stroke
• Sample showing the appropriate amount of oil The amount of oil shown in the samples of the left should be finely adjusted in accordance with sewing processes. Be careful not to excessively increase/decrease the amount of oil in the hook. If the amount of oil is too small, the hook will be seized (the hook Appropriate amount of oil (small) will be hot).
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