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MX80L Series Product Manual Chapter 3 - How to Use the MX80
Parker Hannifin Corporation
33
For multi-axis configurations special attention needs to be taken into account for the moving cables on
the non-base axis.
TIP: For Multi-axis Configurations.
Consider using the top axis for the highest frequency move in the application. The top axis will have
the least amount of weight to move and will reduce the cycles on the cables.
Pneumatic Counterbalance
Cylinder Specification
Description Specifications
Cylinder Piston Area 0.105 in
2
Cylinder Mounting Torque Head nut 0.45 – 0.90 Nm (4 – 8 in-lbs)
Rod End. 0.23 – 0.56 Nm (2 – 5 in-lbs)
Maximum Compressive Rod Force 10 lbs
Allowable Input Pressure 0 – 100 psi
Coefficient of Friction 0.015 (assuming no side load)
Operating Temperature -20 – 175
o
F
Counter Balance Force
For ‘Z’-axis (vertical) applications, the use of the pneumatic counter balance and accessory kit is
strongly recommended. The pneumatic accessory kit includes a filter-regulator-precision regulator,
fittings and 1/8” ID tubing. The pressure in the pneumatic cylinder can be set to provide a balancing
force to counter act the effect of gravity. The counter balance force (F
C
) is a linear function of the
pressure (P) and the cylinder piston area (A
C
); F
C
= PxA
C
. See the following table to set the counter
balance force.
F
C
P
0.25 kg 5.2 psi
0.5 kg 10.5 psi
1 kg 21 psi
2 kg 42 psi
4 kg 84 psi
The yaw force generated by the counter balance will add 0.2 arc-sec of yaw per psi of pressure.
The Pressure regulation during motion is dependent on the speed and acceleration of the motion
profile. The following table shows the expected pressure fluctuation based on the move dynamics.
Acceleration Velocity Fluctuation*
1 g ≤ 500 mm/sec < 1 psi
3 g ≤ 500 mm/sec < 2 psi
3 g ≤ 2000 mm/sec < 3 psi
* 1 psi = 1.68oz (0.47 N) of force
Clean Room Compatibility
The vertical counter balance is compatible with clean rooms of class 250-500 for speeds below 500
mm/sec or class 1000 for higher speeds due to the particle generation on the plunger.
Daedal Division
Irwin
,
Penns
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