Periodic Checks - Brother MD-602 Service Manual

7.5.2 Other DIP switch functions
7.5.2.1 DIP switch 1 o functions
ON Presser foot is lowered when treadle is returned to neutral position immediately after thread trimming. (Export specifications)
SW1-1
OFF Presser foot is raised when treadle is returned to neutral position immediately after thread trimming. (Domestic Japan specifications)
ON Motor pulley diameter 90 mm
SW1-2
OFF Motor pulley diameter 105 mm
ON Automatic presser foot lifter device used
SW1-3
OFF Automatic presser foot lifter device not used
ON Stopping position when treadle is at neutral is needle up stop position.
SW1-4
OFF Stopping position when treadle is at neutral is needle down stop position.
ON Twin needle
SW1-5
OFF Single needle
ON Limit speed setting 1
SW1-6
OFF
ON Limit speed setting 2
SW1-7
OFF
ON Limit speed setting 3
SW1-8
OFF
Setting for limit speed (sewing machine's maximum sewing speed)
Speed (rpm)
1,000
(5,000)
DIP switch
SW1-6 OFF
SW1-7 OFF
SW1-8 OFF
Pulley diameter 105 mm for single-needle machines and overlock machines (90 mm for twin-needle machines)
Note:
When an operation panel has been connected, the operation panel setting has priority, regardless of the setting for DIP
switch 1-4.
Only the maximum sewing speed can be changed using the DIP switch 1-5 setting.
Refer to "7.5.2.2 DIP switch 6 !0 functions" on this page for other speed selection settings.
7.5.2.2 DIP switch 6 !0 functions
DIP switch
Low speed
SW6-1
(inching speed)
Thread trimming
SW6-2
speed
SW6-3 Backtacking speed
Improved stopping
SW6-4
speed
Note:
DIP switches 1 – 2, 1 – 5 and 6 (1 – 4) are set to match the optimum
sewing speed for the machine head, and so should not be changed.
If using the motor after changing over the machine head, check that
the above settings match the specifications of the machine head.

7.6 Periodic checks

• Clean the dust out of the dust cover at periodic intervals. If the dust cover becomes blocked, there is the danger that
the motor may overheat.
• If not using the motor for long periods, turn off the power and disconnect the motor from the power supply.
2,000 2,500 3,000
(5,500) (6,000) (6,500)
ON OFF ON
OFF ON ON
OFF OFF OFF
Setting speed
ON 250 rpm
OFF 215 rpm
ON 185 rpm
OFF 215 rpm
ON 1,000 rpm
OFF 1,800 rpm
ON 1,500 rpm
OFF 1,700 rpm
MD-602, 612
( ) is for overlock machines
3,500 4,000 4,500
(7,000) (7,500) (8,000)
OFF ON OFF
OFF OFF
ON ON
Single-needle machine and overlock machines setting
SW1
SW6
Twin-needle machine setting
SW1
SW6
4,700
(8,500)
ON
ON ON
ON ON
High
-1 -2 -3 -4
High
-1 -2 -3 -4
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