−
56
−
Standard Adjustment
(34) Adjusting the top feed dog pressure
<Standard height of top presser adjusting screw>
MO-6900R
MO-6900J
Dimension A
24 to 25mm
20.5 to 21.5mm
20.5 to 21.5mm
Vertical amount of
top feed dog
Less than 6.5mm
6.5 to 8.5mm
8.5mm
Max.
sewing speed
7,000rpm
7,000rpm
6,000rpm
1. Standard is the position where the top feed dog stops jumping and, when further the screw is
tightened, sound becomes quiet and is stabilized when gradually tightening the screw from the
lower pressure.
Besides, when using the top feed dog making low the top feed dog pressure, decrease the vertical
amount of the top feed dog or decrease the sewing speed.
2. Dimensions listed in the list are slightly increased values that can be guaranteed even when the
vertical amount of top feed dog and sewing speed are in the most strict combination in the list.
Accordingly, when using the machine by decreasing the vertical amount of the top feed dog or
decreasing the sewing speed, use it with rather large value (top feed dog pressure is low) than
dimensions A in the list.
2
1
A
(35) Lifting amount of the top feed dog (when operating the pedal)
The height of the top feed dog from the top surface of the throat plate when the pedal is depressed at
the lowest point of the needle bar and the top feed dog goes up to the highest point is 9
±
0.5 mm.
In case of MO-6900J, the height is 10.5
±
0.5 mm.
1
3
2
Top feed dog
Throat plate
9
±
0.5mm
Summary of Contents for MO-6000S series
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