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Singer 191D-30 Instruction Manual - Page 19

Feed Timing, Adjustment

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3.16 Feed Timing Adjustment Caution If the feed eccentric cam is moved too far, the needle will be broken. Loosen screws '2' and '3' in feed eccentric cam '1', move the feed eccentric cam '1' in the direction of the arrow or opposite direction of the arrow, and firmly tighten the screws '2' and '3' (Figure 25). For the standard adjustment, adjust so that the top surface of feed dog and the top end of needle eyelet are flush with top surface of throat plate when the feed dog descends below the throat plate. To advance the feed timing in order to prevent uneven material feed, move the feed eccentric cam in the direction of the arrow. To delay the feed timing in order to increase stitch tightness, move the feed eccentric cam in the direction from the arrow. Figure 25 High Speed Straight Lockstitch Sewing Machine | Instruction Manual and Parts List 16

Section	Page
Contents	2
1. Safety Instructions	4
1.1 Important Safety Instructions	4
1.2 Safe Operation	5
2. Product Description and Machine Specification	6
2.1 Product Description	6
2.2 Machine Specification	7
2.3 Motor, Motor Pulley and V-Belt Specifications	7
3. Setup and Adjustment Instructions	8
3.1 Table Cut-Out Drawing	8
3.2 Oil Reservoir Installation	9
3.3 Belt Cover and Bobbin Winder Installation	10
3.4 Lubrication	11
3.5 Thread Take-up Lever Oil Supply Adjustment	11
3.6 Rotating Hook Oil Supply Adjustment	12
3.7 Needle Attachment	13
3.8 Bobbin Case Attachment	14
3.9 Machine Threading	14
3.10 Stitch Length Adjustment	15
3.11 Thread Tension Adjustment	15
3.12 Thread Take-Up Spring Adjustment	16
3.13 Knee Lifter Height Adjustment	17
3.14 Presser Foot Lifter Adjustment	17
3.15 Presser Foot Pressure Adjustment	18
3.16 Feed Timing Adjustment	19
3.17 Feed Dog Height Adjustment	20
3.18 Needle to Rotating Hook Relation Adjustment	21
3.19 Presser Bar Height Adjustment	22
3.20 Thread Take-Up Stroke Adjustment	23
4. Maintenance	24
4.1 Machine Head Cleaning	24
4.2 Lubrication	24
4.3 Safety Inspection	24
5. Troubleshooting	25
6. Parts List	26
6.1 Frame and Cover Components	27
6.2 Arm Shaft and Thread Take-Up Lever Components	29
6.3 Needle Bar, Upright Shaft and Rotating Hook Driving Shaft Components	31
6.4 Presser Foot Components	33
6.5 Feed Mechanism Components	35
6.6 Lubrication Components	37
6.7 Oil Reservoir Components	39
6.8 Belt Cover, Bobbin Winder and Thread Stand Components	41