RAIL SYSTEM THE ULTIMATE VACUUM GRIPPER SYSTEM Rail System Modules include all the features of EDCO Vacuum Grippers with a Positive or Limited Purge. In addition they include a pilot-operated cartridge valve for vacuum on/off control. The modules mount to the side of a lightweight 1-1/2 in. x 3 in. rail profile. Air supply plumbing is completely eliminated by utilizing the rail as a manifold to distribute compressed air to each module. Purge Pilot Signal Vacuum On/Off Pilot Signal POSITIVE PRESSURE PURGE: Add Sufix PP Air pressure supplied to the venturi is diverted to the vacuum port by blocking the venturi exhaust with a piston operated by a pilot pressure signal. Tool separation movement must begin immediately (no dwell) when purge signal is initiated to prevent excessive positive pressure inside suction cups due to forces pressing the tool onto the work surface. Vacuum switches should not be used due to their limited over-pressure capability. LIMITED PRESSURE PURGE: Add Suffix LP Similar to Positive Purge except it is modified to limit the pressure applied to the suction cup. Purge air flow is not as robust as with the PP option but the pressure is limited so a vacuum switch can be used for part presence detection. Vacuum Port CLEANING OPERATION SIMPLE SYSTEM ZONING One of the most important features of the Rail System is the ease and ability of zoning. Zoning groups several modules to a pair of 3-way solenoid pilot valves. One solenoid pilot valve controls the vacuum-on and the second controls the positive purge for each zone. Zones can include one to several modules and a system can have one to several zones. Systems should be configured with the smallest number of zones that provide the degree of control required for the application. If the requirements of the application change over time, the Rail System can easily be reconfigured by adjusting the number of modules per zone and/or the number of zones per system. Zones with small numbers of modules provide the most system control, however, they also require the largest number of solenoid pilot valves. Application example: Picking and placing various sizes of cases onto a single mixed pallet load. Some systems may not require the quick-release provided by the PP or LP options. For these systems, the purge pilot ports can be plugged and not used. However, it would be worthwhile to connect all the purge pilot ports to one pilot valve to provide a brief reverseflow cleaning action to blow out any ingested debris from the suction cups every few cycles depending on the application environment. This brief cleaning operation won’t add to total cycle time and should be performed during the return-home period while suction cups are open to atmosphere. SINGLE-STAGE PUMPS RUGGED SHEAR KEY MOUNT Two-point mount with shear keys eliminates the possibility of pumps shifting out of position during operation. Work loads are efficiently and directly transferred to the mounting profile so that mounting screws carry only tensile loads. 1 2 Systems with all modules controlled as a single zone are the simplest and require only two solenoid pilot valves. These systems are limited to basically on/off operation for all of the modules. Application example: Picking and placing identical cases onto a single pallet load. 1) M5 X 40 SCREW 2) T-NUT, RS-5 ©2008 EDCO USA. www.edcousa.net 12:3 RAIL SYSTEM HOW TO ORDER MODULES VACUUM PORT VENTURI PURGE CUP SELECTION RS 18 18 = G1/8 NPS – 10L 08L 10L – PP PP = POSITIVE LP = LIMITED – B50N (BLANK) = NO CUP SEE INFORMATION BELOW SUCTION CUP SELECTION Choose suction cup style, size and rubber material from section 2 of this catalog and add this information as a suffix to the RS18 pump model number. For example; RS18-10L-PP pump and XP-B50N cup are selected, so the complete Vacuum Gripper model number would be RS18-10L Performance in Non-Porous Systems Cup1 Volume: cu. In. (cc) Evacuation Time2: sec. Force @ 15 inHg: lb (N) 1 2 RS18-10L-PP-B50N. For simplified ordering, several Rail System model numbers are tabulated, but other combinations are readily available at standard prices – contact your local EDCO USA distributor or call EDCO for assistance. B110 19 (311) 0.42 64.1 (285) B30 0.61 (10) 0.013 4.1 (18.2) B40 0.9 (14.7) 0.02 7.3 (32.5) B50 2.0 (32.8) 0.04 12.1 (53.8) B75 6.7 (110) 0.15 30.8 (137) BF80 1.8 (29.5) 0.04 35 (156) BF100 4.9 (80.3) 0.11 65 (289) F75 1.2 (19.7) 0.03 37.5 (167) F110 4.3 (70.5) 0.1 78.3 (348) FC75 2.3 (37.6) 0.05 29.1 (129) FC100 4.9 (80.3) 0.11 53.3 (237) Values apply to all cup materials. Evacuating to 15 inHg (50.8 -kPa) at 72 psi (5 bar). EVACUATION TIME In a non-porous system, evacuation time for any vacuum cup is calculated by multiplying the internal cup volume by the time factor for the desired vacuum level from the Evacuation Time Calculation Table. For example: XP-B75 @ 15 inHg (50.8 kPa): Volume Time Factor cu. in. sec. / cu. in. Evacuation Time = 6.7 x .022 = 0.15 sec SINGLE-STAGE PUMPS RS18-10L Evacuation Time Calculation Table Vacuum Level: inHg (-kPa) 9 (30.5) 12 (40.6) 15 (50.8) 18 (61) Time Factor: sec./cu. in. 0.008 0.014 0.022 0.036 21 (71) 0.061 PERFORMANCE SCFM 1.5 Vacuum Flowrate vs. Vacuum Level for ER-08L & ER-10L Venturis ER-08L AC = 1.0 SCFM @ 60 psi E ER-08L L AC = 1.2 S SCFM @ 72 psi p ER 10L ER-10L R RAC = 1 9 SCFM @ 72 psi 1.9 C p ER-10L AC = 1.65 SCFM @ 60 psi 1.0 0.5 0 0 3 6 9 12 15 18 21 24 27 inHg 12:4 ©2008 EDCO USA. www.edcousa.net RAIL SYSTEM DIMENSIONS 1.27 [32.3] 1.2 [30.5] PILOT FITTINGS – ALUMINUM LB25-10 – Elbow 10-32 UNF (M5), with O-ring seal 4mm (5/32 in) O.D. Tubing Barb P10 – Plug 10-32 UNF(M5), with O-ring seal (actual size) weight as shown: 0.0045 lbs (2.14 g) 3.0 [76.2] (actual size) weight as shown: 0.0005 lbs (0.28 g) RS18-10L-PP / RS18-10L-LP 0.73 [18.4] 0.76 [19.3] 1) Purge Pilot Signal - M5 (10-32 UNF) 2) Air Supply - 3/8 NPSF 3) Vacuum On/Off - M5 (10-32 UNF) weight as shown: 0.275 lbs (125 g) VACUUM SENSOR OPTION SIMPLE MODULE ALIGNMENT A P10 plug can be removed from the front or side of the RS18 module to accommodate a VP-3 or VN-3 vacuum sensor. Placing the Reference Face of the module on the center line of the thru hole aligns the compressed air port with the thru hole. SINGLE-STAGE PUMPS C L C L Air Supply Reservoir Reference Edge Front Mount Side Mount ©2008 EDCO USA. www.edcousa.net 0.17 [4.2] Thru Hole 12:5 RAIL SYSTEM RAIL ASSEMBLIES The 1-1/2”x3” Aluminum extrusion profiles include 3/8” NPSF ports at each end, one for air supply and the other for a plug or a pressure gauge. Rails are drilled to mount modules on center-to-center distances to your specifications. The minimum recommended spacing is 1-1/2 in. (38.1 mm) but is also dependent on suction cup diameter. RS18-10L modules will be mounted to the rail and tested by EDCO USA. Pilot port fittings, zone tubing, and 3-way air solenoid pilot valves must be installed by the system integrator because of the many possible configurations. G1/2 NPSF Slots in Rail are still accessable HOW TO ORDER ASSEMBLIES NUMBER OF MODULES CENTER SPACING END SPACING SINGLE OR DOUBLE SIDED RSA M M = TOTAL NUMBER OF MODULES DESIRED – C C = DISTANCE FROM CENTER OF ONE MODULE TO THE CENTER OF THE NEXT MODULE – E E = DISTANCE FROM END OF PROFILE TO THE CENTER OF THE FIRST MODULE – S S = MODULES ON ONE SIDE D1 = MODULES ON BOTH SIDES 1 Option D is limited to 50mm and smaller cups. PROFILE LENGTH Minimum recommended center-to-center spacing is 1.5in but is also dependent on suction cup diameter. The minimum recommended end spacing is 0.9 in. Profile Length Calculation + 2 x End Spacing (in) Center Spacing (in) x (Number of Modules* - 1) = Profile Length (in) * For a Double Sided rail divide the Number of Modules by 2. RAIL ASSEMBLY WEIGHT For total assembly weight add the Rail weight with RS18 Module weights, 0.253 lbs for the 3/8 NPSF End Caps, suction cup weights, and fitting weights. Weight Calculations Profile Length (in) x 0.138 Number of Modules x 0.275 + 0.267 (End Plates) = Rail Weight (lbs) Example: Examples: Single Sided Rail RSA-20-2.40-0.9-S End Spacing = 0.9 Center Spacing = 2.40 Number of Modules = 20 + RSA-20-2.40-0.9-S Profile Length = 47.4 in + 47.4 x 0.138 20 x 0.275 0.267 = 11.21 lbs Total Weight (lbs) 2 x (0.9) 2.40 x (20-1) = 47.4 in. Rail Weight (lbs) Number of P10 x 0.0005 Number of LB25-10 x 0.0045 Number of Cups x Cup Weight + Number of Cups x Cup Fitting Weight Total Weight (lbs) RSA-20-2.40-0.9-S with RS18-10L-PP-B50N Double Sided Rail RSA-40-2.00-0.9-D End Spacing = 0.9 Center Spacing = 2.00 *Number of Modules = 40 For the calculation we need to divide the Number of Modules by 2. 40/2 = 20 + 2 x (0.9) 2.00 x (20-1) = 39.8 in. Rail Weight 20 P10 Plugs 20 LB25-10 Elbows 20 XP-B50N Cups 20 50-38M Fittings + Total Weight 11.21 20 x 0.0005 20 x 0.0045 20 x 0.047 20 x 0.02 = 12.65 lbs 12:6 ©2008 EDCO USA. www.edcousa.net SINGLE-STAGE PUMPS Rail Weight (lbs) RAIL SYSTEM Single Side Assembly C E Double Side Assembly Zoned Rail Assembly with Typical XP-B50 center-to-center spacing of 2.36in (60mm) SINGLE-STAGE PUMPS 2.36 [60] To Purge Solenoid Pilot Valve To Purge Vacuum On/Off Solenoid Pilot Valve ©2008 EDCO USA. www.edcousa.net 12:7 RAIL SYSTEM Palletizing Application with Double Sided Rail and XP-2B50 Cups 12:8 ©2008 EDCO USA. www.edcousa.net SINGLE-STAGE PUMPS