Porter International Box Spring Machine CB-100

. Make sure oil level is correctly maintained in oil sight gauge.

. Make sure needle is correctly set and not damaged.

. Make sure threading is correct.

· Make sure chaining thread approximately

10 mm long remains behind presser foot.

It is necessary to have a chaining thread approximately 10 mm long behind the presser foot when starting to sew. This will avoid "skip-stitches."

After replacing needles or thread, check that a continuous, smooth neat chaining thread comes out from under the presser foot.

Lubrication is important in operating precision machines like the BS 401. The life of the machine depends on the use of quality oil. Use only oil recommended for these machines as shown at right.

1. At the end of 4 weeks, the original oil should be drained and replaced

2. Oil level should always be kept between two lines on the oil sight gauge (as shown in Fig.3 below).

1 Remove oil sight window 1 and pour fresh oil into reservoir (700 c.c. capacity) until oil reaches upper line of oil sight gauge @

Caution: Keep oil level between the two lines on gauge 2.

1 .Remove the machine from its stand and set it on a table.

1. Flip up "hemmer" toggle switch.

2. Adjust main air knob to obtain 80-100 PSI of air pressure.

3. Tighten center screw on knob to lock the knob at this position.

1. Flip up "binder" toggle switch.

2. Adjust knob and tighten screw to obtain 30 PSI of air pressure as described below.

C."A, B, C" gauges (These gauges control the air pressure on the drag foot. The three switches toggle three different types of material.)

1. Flip up respective toggle switches.

Warning: Ensure the machine is turned off and unplugged before starting the procedure.

Is the main feed at the standard height?

If not, follow the steps below.

Adjust feed 1 by raising or lowering until proper height is obtained.

Sign off on the feed height adjustment

Warning: This procedure requires trained personnel!

Feeds are at their highest position

Screws 6 and cover plate 7 removed

Screw 9 removed and screw 10 turned for proper tilt

Screw 8 tightened and play in feed bars eliminated

Cover plate 7 and screws 6 replaced

Sign off on the feed tilt adjustment