27
8) Adjustment of differential feed
[ Caution ]
Be sure to turn the power switch off before adjusting differential feed.
[ Figure 34 ][ Figure 33 ]
①
②
③
④
⑴ Differential feed
Set normal differential feed or reverse differential feed by rotating differential feed regulating handle①. As differential
feed is driven independently from main feed, changes in main feed (stitch length) will result in differential ratio. Be sure
to re-adjust main feed to maintain a consistent level of differential ratio.
Scales in figure 34 show the level of differential feed. For example, if the desired feed or stitch length is 2, turn the
differential feed regulating handle ① to bring the scale at 2 to obtain the differential ratio of 1:1.
Normal differential is when the scale is set larger than 2, and reverse differential is when set less than 2.
⑵ Change of differential feed
Select the lever position from the scale pointed by the differential feed regulating lever④ when (differential feed)
regulating handle① is turned, to regulating lever stopper ②. Then tighten with the regulating lever nut ③ afterwards.
For maximum differential feed, turn the handle ① to set the lever at the scale ‘1’.
※ The range of differential feed changes in accordance with stitch length. Refer to the table below.
Stitch length (mm) Maximum normal differential feed Maximum reverse differential feed
3.6 1 : 1.1 1 : 0.3
2.5 1 : 1.6 1 : 0.4
2.0 1 : 2 1 : 0.5
1.4 1 : 2.9 1 : 0.7
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