Revised 09 /2005
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1- 6 7
84-55
PNEUMATICS
6.7
S7 JIG ALIGNMENT
When solenoid is energized, air flows thro’ line A7. This causes the jig align cylinder to activate and
pull on the snubber arm block and straightens out the jig. An air pressure regulator is fitted in line to
control the force applied to the snubber block. When the solenoid is de-energized air flows through
B7 releasing the pressure on the snubber block.
6.8
S9 JIG DRIVE CLAMP
When the solenoid is energized air flows through line A8 causing the jig drive clamp cylinder to
operate. This clamps the drive bearing outer race. When this solenoid is de-energized air flows
through B8 causing the cylinder to release the clamp ring.
CAUTION: THE JIG DRIVE CLAMP CYLINDER MUST NOT BE ACTIVATED IF THE DC MO-
TOR AND CLUTCH ARE ACTIVATED.
6.9
S10 AIR BLOWERS
There are 3 blowers on the machine:
One to the throat plate, one to cloth disposal and one to the presser foot side blower. The three air
regulators located onside the cabinet door individually control these. These are labeled as TP, CD
and PF respectively. The blowers only work when a signal is sent from the knife solenoid valve to
the pilot valve.
7.0 AIR FLOW CONTROLS
Some cylinders are fitted with flow control valves to adjust the speed of operation of a cylinder. For
example the drive wheel cylinder (Figure 4.0) must be adjusted so that the drive wheel is brought
smoothly into contact with the edge of the jig. Otherwise damage may be caused to the jig.
7.1 AIR PRESSURE REGULATORS AND WATER FILTERS
When the air is released to the machine from the main pneumatic line, full line pressure is fed into
the regulator. Regulator should be set to 80PSI. The gauge on the machine shows the pressure out of
the regulator, this supplies air to the