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BF-F921 EMBROIDERY MACHINE | |
TOTAL NUMBERS OF NEEDLES/HEAD | 9 Needles 21 Heads |
EMBROIDERY AREA | 600x1200 MM |
HEAD INTERVAL | 300 MM |
SIZE | 8100*2800*1200MM |
TABLE SIZE | 8100*2800MM |
COMPUTER | DAHAO COMPUTER |
MOTOR | DAHAO SERVO MOTOR |
BELT | ITALY BELT |
HOOK | JAPANESE HOOK |
DRIVER | LINEAR DRIVER |
OTHER PARTS | STANDARD PARTS, WITH AN EXTRA TOOL BOX |
CUTTER | WITHOUT CUTTER |
BEAM SIZE | 300x300x10MM |
TABLE | BEK |
MAX SPEED | 850RPM |
POWER | 110~ 220V~380V |






1.unable to start
Probable causes | Actions |
Belt is loose or broken | Tighten or replace belt |
Fuse for power or circuit blown out | Check ampere capacity and replace fuse |
Needle position signal or one-rotaion signal is not detected | Adjust needle position with wrench so that needle position LED come on |
Frame linit switch is actuated | Move frame to appropriate position |
Abnormality warning lamp in drive unit is on | Clean air filter |
Incomplete contact of connectors in control box | Securely couple connectors |
Incomplete contact of connectros in main shaft drive motor control box | Securely couple connectors |
2.color change incorrect
Probable causes | Actions |
Incorrect stop position | Manually set main shaft to fixed position |
Needle position and one-rotation singals are not detected | Adjust needle position with wrench so that stop position indicating lamp comes on |
Incoreect needle bar position | Set position correctly |
Incorrect take-up lever position | Adjust take-up lever so that it coincides with others in position at fixed position |
Relay or fuse for color change defective | Replace relay or fuse |
3.upper thread defective incomplete
Probale causes | Actions |
Thread take-up spring incomplete contact | Securely couple connectors |
Tension base connector incomplete contact | Securely couple connectors |
Upper thread breakage timing contact incomplete | Clean and adjust the upper thread breakage timing contact |
4.deformed design
Probable causes | Actions |
Frame drive belt is too tight | Loosen |
Frame guide rails are clogged with foreign materials | Clean the rails |
Frame drive circuit defective | Replace |
Mamory plate defactive | Replace |
Overall weight of the frame is excessive | Decrease RPM |
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