3
Set-up and adjustments
Set the deadband
The deadband adjustment changes the tolerance on the ending position of the PFC rod.
Smaller deadbands mean a tight tolerance and higher positioning accuracy. Higher deadbands
are required for greater loads.
1.
Application sizing chart (PCS manual page 23, below) identifies “Zero Friction Deadband
Voltage” for setting deadband. The deadband setting can be varied from 0.005 to 0.500 VDC.
2.
Locate TP1, TP2, SW1, and the deadband adjustment pot.
3.
Move SW1 to SET position.
4.
Set DMM to DC volts and measure between TP1 and TP2.
5.
Adjust deadband setscrew to 100 mV initially.
6.
Move SW1 to NORMAL position.
Technical Tips
PCS-PFC Quick Set-up Instructions
The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under actual operating
conditions. Bimba reserves the right to change specifications without prior notice.
Identify LEDs and Span and Zero adjustments
LEDs indicate valve operation
1.
Green LED means rod is being extended: Air is exhausted from
Valve 1 (front) and pressure is applied at Valve 3 (rear).
2.
Red LED means rod is being retracted: Air is exhausted from Valve
3 (rear) and pressure is applied at Valve 1 (front).
Set the zero position
1.
Set control voltage to 0.
2.
Turn ZERO adjust CW until rod is in the desired retracted position (not necessarily fully retracted).
3.
Red LED should not be on continuously.
Application Sizing and “Rules of Thumb”
PFC Cylinder/PCS Valve System Matching and Sizing Reommendations
TP1
TP2
Deadband
SW1
LEDs
Span
Zero
Bore Size
PCS
MODEL
Stroke
Range
Maximum
Payload @
Average
Velocity
(Ibs.)
Maximum
Average
Velocity
Without
Overshoot
(In/Sec)
Maximum
External
Friction
(Ibs.)
Zero
Friction
Deadband
Width Per
Inch Of
Stroke
1/2
Maximum
Friction
Deadband
Width Per
Inch Of
Stroke
Maximum
Friction
Deadband
Width per
inch of
stroke
Minimum
Step (In.)
1-1/16“ (PFC-09)
PCS-1
2” to 7” 1
2,75
0
0.005”
N/A
N/A
0,08
1-1/16“ (PFC-09)
PCS-1
8” to 24” 30
4,00
5
0.004”
0,008”
0,016”
0,2-0,39
1-1/2“ (PFC-17)
PCS-1
1” to 3” 2
2,5
0
0.0025”
N/A
N/A
0,04
Bimba Manufacturing
Telephone: 708.534.8544
Email: [email protected]
www.bimba.com
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