−
13
−
Adjust so that the distance from the support cylinder of the upper
needle bar to the support cylinder of the lower needle bar is 23.2
±
0.2 mm when they come closest to each other in their stroke (35˚ to
37˚).
Loosen setscrew
A
, and using the gauge adjust the height of the
support cylinder of the lower needle bar. When finely adjusting the
height of the support cylinder of the lower needle bar, loosen setscrew
B
, and turn the lower eccentric pin.
Apply the minus tolerance when adjusting the distance between the
support cylinders when they come closest to each other in their stroke
Open the throat plate on the left-hand side, and use the gauge with
turned upside down.
Dimension B of the gauge is 23 mm.
* Perform this adjustment after checking that 4-(4)-1) “Adjusting the
height of the support cylinder of the upper needle bar” has been
performed.
™
I f t h e h e i g h t s h i f t s , n e e d l e
transferring cannot be properly
made, causing needle breakage.
™
If the closest distance shifts, needle
tranferring cannot be properly
made, causing needle breakage.
Bring the support cylinder of the upper needle bar to its lower stop
position (within the range of 42˚ to 209.4˚). Loosen two setscrews
A
,
and adjust so that a distance of 12
±
0.2 mm is obtained between the
throat plate and the support cylinder. When finely adjusting the
distance, loosen setscrew
B
, and turn the upper eccentric pin.
Dimension A of the gauge is 12 mm.
Adjustment Procedures
Results of Improper Adjustment
