
Original Instructions: 001059 DRAFT
37
Twin-Axis
Sheathing Saw: Maintenance
to find their ideal cushioning between the completely closed and completely open
positions.
• A completely closed cushion valve causes the cylinder to slow abruptly near
the end of its stroke, increasing the cycle time.
• A completely open cushion valve prevents the cylinder from decelerating
the load, producing a jarring end impact.
If cylinders with cushion valves are not adjusted properly, adjust the cushion valve
using the following steps.
1. Lockout/tagout the pneumatic system and drain the lines of pressure in
order to prevent cylinder motion.
2. Slide underneath the table.
3. Turn the adjusting screw clockwise until the valve is completely closed.
See Figure 5-15 and Figure 5-16 for the location of the screw.s
4. Turn the adjusting screw counterclockwise a 1/2 turn.
5. Slide out from underneath the table and re-pressurize the system.
6. Actuate the cylinder using a normal load at normal speed.
7. Repeat steps 4-6 until the cylinder decelerates the load without the
increased cycle time that occurs with a completely closed valve or the
jarring end impact that occurs with a completely open valve.
• You may need to fine-tune the cylinder by 1/8 turns when you approach
ideal cushioning.
• Failure to properly maintain and calibrated the cushion valves may
shorten the lifespan of the cylinders.
Adjusting Flow Control Valves
Both ends of some cylinders have flow control valves to adjust how fast the
cylinders extend and retract. If cylinders with flow control valves move too slowly
or quickly, adjust the flow control valves. The location of the flow control valve that
needs adjustment depends on whether the adjustment is needed on the
extending or retracting stroke. See Figure 5-15 and Figure 5-16 for the location of
the flow control valves.
Table 5-4: Adjusting the Flow Control Valves
Stroke
Valve Location
Increase Speed
Decrease Speed
Extend
Rod end of cylinder Turn the adjusting screw
counterclockwise
Turn the adjusting
screw clockwise
Retract
Cap end of cylinder Turn the adjusting screw
counterclockwise
Turn the adjusting
screw clockwise
Flathead
screwdriver
Hex key set