Related Manuals for Bimba PCS
Summary of Contents for Bimba PCS
- Page 1 Model PCS Pneumatic Motion Control System User Manual Please read this manual carefully before implementing your Pneumatic Control System.
- Page 2 User Manual Model PCS Pneumatic Motion Control System GENERAL WARNINGS AND SAFETY GUIDELINES Start by Reading These Important Safety Rules This safety alert symbol means caution ― personal safety, property/fixturing damage, or danger from Electrical shock. Read instructions with this symbol Carefully.
-
Page 3: Table Of Contents
8. Check All Electrical and Pneumatic Connections 9. Apply 24 VDC Power 10. Apply Pneumatic Pressure 11. Set the “Deadband” 12. Command the Bimba Actuator to its Zero Position 13. Preliminary “Zero” Adjustment 14. Preliminary “Span” Adjustment 15. Final “Zero” and “Span” Adjustment 16. -
Page 4: General Overview
The standard PCS accepts a 0 to 10 VDC or 4 to 20mA analog command signal, jumper selectable (refer to the illustration on page 11). The command signal defines the position the rod must move to. The rod stops when the feedback voltage from the probe is equal to the command signal. -
Page 5: Typical Applications
Robotic End Effector The PCS system can control the open position of an end effector for a robotic arm. If the robotic arm is picking and placing differently sized products, the cycle rate can be increased if the open position is automatically adjusted to be only slightly larger than the product itself, reducing the time it takes to grasp the product. - Page 6 When the PFC rod is fully extended or the PTF shaft is rotated fully clockwise (CW), it will reach a mechanical stop, due to either a mechanical limit in the application or the actuator’s end of stroke or rotation. The PCS’...
- Page 7 Range is measured in volts and can be adjusted between 0.5 and 13.5 volts. Optimal decel settings vary with the load and application. However, 1.5 volts is a good default setting for PCS models 1, 2, and 3, and 9 to 11...
- Page 8 DR = 0.01485 * V * t where: DR = decel range V = voltage reading from the PCS t = full scale travel of the actuator (Note: for PTF rotary actuators with total rotation less than 180º, always make t = 180) Example 1: If the Decel Range is set to 5 volts for an 8 inch stroke cylinder, then deceleration will occur for 0.60...
-
Page 9: Installation Instructions
Option-N (No Enclosure) If Option-N is specified, the PCS system will be shipped with the PCS printed circuit board, a snap track, a valve manifold, and four 25 foot valve cables. The snap track allows for easy mounting inside a larger enclosure box. - Page 10 Air line connections are described in the illustrations below. Instructions follow. Also consult the Appendix for air and electrical connections to PFCN, PFC, and PT. Air hose connections for enclosed controls PCS models 1, 2, 3 Air hose connections for option N PCS...
-
Page 11: Connect The Power Cable
(TB1) on the PCS circuit board (refer to illustration below). If a shield wire is used, twist the Ground wire and the Shield wire together and connect to the Ground terminal (do not terminate the other side of the shield). -
Page 12: Connect The Feedback Cable
5. CONNECT THE FEEDBACK CABLE For PFCN only, power to the probe MUST come from 24 VDC supplied to the PCS control, and NOT the 10 VDC that the PCS produces from terminal A of TB2. -
Page 13: Connect The Command Signal Cable
@ Position: A digital output signal that is normally open and switches to ground when the actuator is within the Deadband zone (Current Position equals Command Signal). Ground: This is the power return path and must connect to both the Main Control and the PCS control ground connections. -
Page 14: Perform The Following Step For Option N Only
9. APPLY 24 VDC POWER With the actuator mounted in final position and the PCS or snap track mounted in its final position, apply the 24 VDC power to the PCS. The cylinder should not move since it does not yet have any pneumatic pressure. You... -
Page 15: Apply Pneumatic Pressure
Ensure the actuator is clear of all obstacles. Apply a low pneumatic pressure (20 psi). The actuator should attempt to move. If no command signal is applied to the PCS, the cylinder will attempt to assume its zero position. Once the cylinder has moved and stopped, raise the pressure to the normal operating pressure (70 to 80 psi). -
Page 16: Command The Bimba Actuator To Its Zero Position
Adjust the Zero setting so that it coincides with the desired retracted or rotational position hard stop. First note the two red and green LEDs on the PCS printed circuit board. If the PCS wants to move the actuator towards the actuator zero position, but cannot due to a mechanical limitation, the red LED will stay on continuously flicker. - Page 17 PTF’s less than 180 degrees of rotation are shipped with the feedback potentiometer’s electrical zero set to the PTF’s rotational zero position, so when the zero analog command input signal is applied to the PCS input, the PTF should be very close to the zero rotational position when the zero adjustment is fully CW.
-
Page 18: Preliminary "Span" Adjustment
Using the Main Control (or equivalent), command the actuator to go to the analog command input signal full scale position. (Set the analog command input signal to 10 volts, or 20 mA depending on the PCS Model.) Look at the LEDs and make the adjustments described in one of the appropriate following paragraphs. -
Page 19: Final "Zero" And "Span" Adjustment
User Manual Model PCS Pneumatic Motion Control System If neither LED is on - (Span is currently set somewhere in mid-stroke.) Slowly adjust the Span potentiometer CCW to move the actuator rod or shaft toward the full scale position. When the actuator hits the full scale position, the green LED will continue to flicker even when the adjustment is no longer being turned. - Page 20 LED never comes on, then the Decel Range is too big. This iterative adjustment can be used to optimize the PCS for your specific application.
-
Page 21: Application Example
PFC Example Suppose we have just finished the installation procedure for a Bimba PFC Cylinder with 10 inches of stroke, and are using a 0-10 VDC input command signal. There is a retracted hard stop at 1.5 inches of cylinder stroke and an extended hard stop at the 9.0 inches of cylinder stroke. -
Page 22: Specifications
Regulated and Filtered to 5 micron Operational Temperature Range 0 to 100 degrees F (Electronics\PC Board) Reverse Polarity Protected Overvoltage Protected APPLICATION SIZING AND “RULES OF THUMB PFC Cylinder/PCS Valve System Matching and Sizing Recommendations* MAXIMUM ZERO MAXIMUM 1/2 MAXIMUM STROKE... - Page 23 Flow controls can be used if lower velocities are required. Do not allow the PCS valves to stay on for prolonged time periods unless the valves are well ventilated, as they may overheat potentially causing damage to the valves.
-
Page 24: Troubleshooting
10 VDC present across the PCS Sensor terminals A and C. If 10 VDC is not present, there is a problem with the PCS Sensor excitation circuit and will need repaired. If... - Page 25 (deadband is too big), sluggishness or instability. Problem: The actuator and PCS system are not sized properly. Solution: Refer to the Application Sizing Chart in the PCS catalog to ensure the actuator and PCS system are sized properly for the application requirements.
- Page 26 Problem: The actuator and PCS system are not sized properly. Solution: Refer to the Application Sizing Chart in the PCS catalog to ensure the actuator and PCS system are sized properly for the application requirements.
- Page 27 Problem: The Electrical Power Supply is supplying less than the required 23.5 VDC. Solution: Utilize a DC power supply that can supply the minimum 23.5 VDC required by the PCS. At voltages less than 23.5 VDC, the system performance will degrade.
- Page 28 Problem: There are air leaks between the valves and the actuator. Solution: Fix any leaks between the valve and the actuator. The PCS system will compensate for leaks in the system. The popping noise is the valves actuating to maintain position.
-
Page 29: Frequently Asked Questions
Solution: The actuators and valves are built to minimize leakage, but not to totally eliminate it. If a stable positioned actuator drifts toward the edge of the system deadband, the PCS will pulse to maintain position. If the deadband is set very narrow, this correction will be more frequent. -
Page 30: Pfc System Block Diagram
User Manual Model PCS Pneumatic Motion Control System APPENDIX A PFC ELECTRICAL AND PNEUMATIC CONNECTIONS... -
Page 31: Pfcn System Block Diagram
PFCN ELECTRICAL AND PNEUMATIC CONNECTIONS Note that for the PFCN, power to the probe MUST come from 24 VDC supplied to the PCS control, and NOT the 10 VDC that the PCS produces from terminal A of TB2. -
Page 32: Ptf System Block Diagram
User Manual Model PCS Pneumatic Motion Control System PT ELECTRICAL AND PNEUMATIC CONNECTIONS Note: For Single Rack Models, Use Only Bodies “A” and “B.”... -
Page 33: Appendix B - Pfc Probe Replacement Instructions
User Manual Model PCS Pneumatic Motion Control System APPENDIX B PFC PROBE REPLACEMENT INSTRUCTIONS 1. Using the correct allen wrench identified in the table below, remove the four socket head cap screws on the rear of the cylinder. BORE WRENCH... - Page 34 User Manual Model PCS Pneumatic Motion Control System 4. Gently insert the replacement probe into the cylinder, rotating it until it slides through the hole in the piston. DO NOT FORCE THE PROBE INTO THE CYLINDER. It should slide in freely with minimal friction.
-
Page 35: Appendix C - Pfcn Probe Adjustment And Replacement Instructions
User Manual Model PCS Pneumatic Motion Control System APPENDIX 6 PFCN PROBE ADJUSTMENT AND REPLACEMENT INSTRUCTIONS Probe Adjustment Probe output calibration is normally not required. Every PFCN is calibrated at the factory for 0 to 10 V DC output fully retracted to fully extended. If readjustment is necessary in your application, follow the instructions below: 1. - Page 36 IMI Precision Engineering companies visit www.imi-precision.com Supported by distributors worldwide. Due to our policy of continuous Bimba Manufacturing Company development, Bimba reserve the Monee, Illinois 60449-0068 right to change specifications Tel: 708.534.8544 without prior notice. Tech Support: 800.44BIMBA Fax: 708.235.2014 en/11/18 support@bimba.com...
Need help?
Do you have a question about the PCS and is the answer not in the manual?
Questions and answers