Bimba SPCS - Manual (Page 8)

2014.01.23 rev4 8
3. Basic Settings
Analog Button: Selection allows operation using an external signal source.
PC Slider Button: Selection allows operation by moving the Cylinder Command slider up and down,
extending and retracting the cylinder.
PC Square Wave Button: Sends a square wave command signal based upon the gain perimeters described
below, the minimum/maximum rod positions, ramp up/ramp down and period settings found on the
Advance Setting screen. When selected the cylinder will operate using a square way generated by the
software. You can adjust the gain, rod position and period perimeters during operation to further
understand system responsiveness.
Gain Settings
Proportional
Increase or Decrease the cylinders responsiveness to changes in the command or feedback signal. Lower
% slower responsive – Higher % quicker response. Note: If too high system becomes unstable. Suggested
starting value 15% (Higher % needed for bore sizes 1-1/16” and below – Lower % needed for bore sizes
above 1-1/16”)
Derivative
Prevents Overshoot – Reduces overshoot and soothes system performance. Too high of a percentage gain
can cause undershoot and creep into the target position as well as system instability. Suggested starting
value 0.
Force Damping
Increase or Decrease Force Damping – Increases system stability. Lower % less force damping – Higher
% more force damping. Too little force damping can create an oscillating rod condition. Too much force
damping can result in a nonresponsive system. Suggested starting value 15%.
Offset
Offset - Offset is used when the cylinder is mounted vertically to create symmetrical or balanced motion. If
the cylinder is facing “rod up”, the offset should be increased. When a cylinder is facing down the offset
should be decreased (Negative setting). Value should be set to 0 for horizontal applications
Save your settings:
Oscillations: If the rod begins a rapid oscillation the Proportional or Force Damping % requires adjustment.
To correct this either decrease the Proporational gain or increase Force Damping
Proportional, Derivative, Force Damping, Offset -- At setup the default settings are set at zero. After ad-
justment, if necessary they can be reset to the default value by clicking: