This guide must be kept available for reference at all times. DISCLAIMER PRIVACY Inasmuch as RJG, Inc. has no control Designed and developed by RJG, Inc. over the use to which others may put Manual design, format and structure this material, it does not guarantee that copyright 2021 RJG, Inc.
Sensor will be installed behind an ejector, outside cabling. Designed exclusively • blade, or core pin. for use with the RJG eDART® or Copilot® Systems, all sensors are fully functional Applied plastic pressure is high enough • and properly named with a single cable...
SELECTION CHARTS The charts below are only a guide. In order to assure correct sensor selection for your application, please contact RJG. Locate the pin size that will be used and match it to the location on the part (near the end of fill or near the gate).
Page 11
SENSOR AND EJECTOR PIN SIZE (continued) 2. Metric Units NORMAL PRESSURE HIGH PRESSURE Pin Size Sensor Model Sensor Model 1.0 mm LES-B-127-50 LES-B-127-50 1.5 mm LES-B-127-50 LES-B-127-50 2.0 mm LES-B-127-50 LES-B-127-125 2.5 mm LES-B-127-125 LES-B-127-125 3.0 mm LES-B-127-125 LES-B-127-125 3.5 mm LES-B-127-125 LES-B-127-125 4.0 mm...
The sensor sends out a low‑level The sensor are connected to the RJG, Inc. voltage signal which is proportional to the eDART System, which records and displays amount of force applied by the pressure the sensor’s measurement for use in...
Cable lengths are determined at time of order; each LES‑B‑127‑50/125/500/2000 is custom‑fit for application. The minimum sensor cable length available, measured from the center of the sensor head, is 1.50” (38,1 mm). Contact RJG Customer Support for more information. Product Manual | Lynx™ Embedded Sensors LES‑B‑127‑50/125/500/2000...
LYNX CONNECTOR AND PG9 THREAD The Lynx connector is keyed at 45° to provided the proper orientation of cable connection, particularly for the 90° Lynx cables. LYNX CONNECTOR Pg9 THREAD PG Nominal Size Call‑ Minor Ø Male Thd. d1 13.86 [mm] Major Ø...
Page 15
INSTALLATION CLAMP PLATE INSTALLATIONS Sensors may be placed in the clamp plate behind transfer pins, or in the ejector plate Typical Head‑to‑Head behind ejector pins. Installation location—in the clamp plate or ejector plate—depends upon mold real estate and customer preference. Transfer pins protect the sensor from damaging shock loads that are applied when the ejector plate moves forward...
INSTALLATION OVERVIEW CLAMP PLATE (TYPICAL) INSTALLATION CLAMP PLATE (TYPICAL) INSTALLATION Apply the clamp plate (typical) installation B Plate or to instances where the ejector and transfer Cavity Insert pins are less than 0.28” (7,0 mm) in diame‑ ter. The sensor connector plate is mounted on Ejector Pin the mold.
If the angle is greater than 30°, contact RJG customer support for assistance in verifying suitability for use with an RJG sensor (refer to “Customer Support”...
0.030" [0.76] OR 10% OF EJECTOR PIN DIA, WHICHEVER IS SMALLER. ENCLOSED EJECTOR BOX SUGGESTED. Description: LES-B-127-XXXX DO NOT SCALE PRINT RJG, Inc. Sensor Installation BREAK ALL SHARP EDGES, 0.005 [0.03] R MAX DIMENSIONS IN INCHES [MM], UNLESS NOTED 3111 Park Drive Drawn: K.J.Brettschneider...
Page 19
[13.0 0.1] SMALLER. ENCLOSED EJECTOR BOX SUGGESTED. LES-B-127-125 0.2 [5] Description: LES-B-127-XXXX DO NOT SCALE PRINT RJG, Inc. DETAIL C Sensor Installation BREAK ALL SHARP EDGES, 0.005 [0.03] R MAX LES-B-127-500 0.25 [6] 3111 Park Drive DIMENSIONS IN INCHES [MM], UNLESS NOTED SCALE 2.75 : 1...
Page 20
INSTALLATION SPECIFICATIONS (continued) CLAMP PLATE (TYPICAL) INSTALLATION 1. Sensor Head Pocket Sensor and transfer pin head pockets are machined into the clamp plate. The sensor pockets must be centered under the selected ejector pin measuring 0.510” +0.005/‑0.0 (13,00 mm ±0,10 [ at right]) DIA, and 0.374”...
Page 21
INSTALLATION SPECIFICATIONS (continued) CLAMP PLATE (TYPICAL) INSTALLATION 3. Ejector Pin Head Pocket Machine a pocket for the ejector pin head in the ejector retainer plate that is equal to the ejector pin head DIA plus 0.02” (0,5 mm [ at right]) MIN per side. Allow clearance above the ejector pin head.
0.030" [0.76] OR 10% OF EJECTOR PIN DIA, WHICHEVER IS SMALLER. ENCLOSED EJECTOR BOX SUGGESTED. Description: LES-B-127-XXXX DO NOT SCALE PRINT RJG, Inc. Sensor Installation BREAK ALL SHARP EDGES, 0.005 [0.03] R MAX Lynx™ Strain Gage Button Sensors LS‑B‑127‑50/125/500/2000 | Product Manual 3111 Park Drive DIMENSIONS IN INCHES [MM], UNLESS NOTED Drawn: K.J.Brettschneider...
Page 23
SMALLER. ENCLOSED EJECTOR BOX SUGGESTED. LES-B-127-125 0.2 [5] [13 0.1] Description: LES-B-127-XXXX DO NOT SCALE PRINT RJG, Inc. Sensor Installation BREAK ALL SHARP EDGES, 0.005 [0.03] R MAX LES-B-127-500 0.25 [6] 3111 Park Drive DIMENSIONS IN INCHES [MM], UNLESS NOTED Drawn: K.J.Brettschneider...
Page 24
INSTALLATION SPECIFICATIONS (continued) CLAMP PLATE (HEAD‑TO‑HEAD) INSTALLATION 1. Sensor Head Pocket Sensor head pockets are machined into the clamp plate. The sensor pockets must be centered under the selected ejector pin measuring 0.510” +0.005/‑0.0 (13,0 mm ±0,10 [ at right]) DIA, and 0.374” +0.002/ ‑0.001 (9,49 mm ±‑0,04 [ at right]) deep, with an added clearance of 0.01”...
Page 25
INSTALLATION SPECIFICATIONS (continued) CLAMP PLATE (HEAD‑TO‑HEAD) INSTALLATION 3. Transfer Pin Shaft and Head Pocket Machine a pocket for the transfer pin shaft in the ejector plate with an H7/g6 fit for 0.5” (12 mm [ at right]) MIN. Machine a pocket for the transfer pin head in the ejector plate that is equal to the transfer pin head DIA plus 0.02”...
INSTALLATION SPECIFICATIONS (continued) CLAMP PLATE (HEAD‑TO‑HEAD) INSTALLATION COVER PLATE—CLAMP PLATE The cover plate must be made of SAE 1080 steel (AFNOR XC70/XC80), 32HRC. The cover plate may be an additional, whole plate added to the stack and secured with screws (below, top), or an integrated plate made to embed into the clamp plate and secured with screws (below, bottom).
Page 27
RJG recommends the use of 8‑36 or 10‑32 (M4 or M5).
EJECTOR PIN AND SENSOR CONCENTRICITY MUST BE WITHIN 0.030" [0.76] OR 10% OF EJECTOR PIN DIA WHICHEVER IS SMALLER. Description: LES-B-127-XXXX DO NOT SCALE PRINT RJG, Inc. Sensor Installation BREAK ALL SHARP EDGES, 0.005 [0.03] R MAX 3111 Park Drive DIMENSIONS IN INCHES [MM], UNLESS NOTED Drawn: K.J.Brettschneider...
Page 29
EJECTOR PIN AND SENSOR CONCENTRICITY MUST BE WITHIN 0.030" [0.76] OR 10% OF EJECTOR PIN DIA, WHICHEVER IS SMALLER. Description: LES-B-127-XXXX DO NOT SCALE PRINT RJG, Inc. Sensor Installation BREAK ALL SHARP EDGES, 0.005 [0.03] R MAX DIMENSIONS IN INCHES [MM], UNLESS NOTED 3111 Park Drive Drawn: K.J.Brettschneider...
Page 30
INSTALLATION SPECIFICATIONS (continued) EJECTOR PLATE INSTALLATION 1. Sensor Pocket Machining Sensor pockets are machined into the cover and ejector plates. The pockets must be centered under the selected ejector pin measuring 0.510” +0.005/‑0.0 (13,0 mm +/‑ 0,10 [ at right]) DIA, and 0.375” +0.003/‑ 0.0 (9,49 mm +/‑0,01 [ at right]) deep.
INSTALLATION SPECIFICATIONS (continued) COVER PLATE—EJECTOR PLATE The cover plate must be made of SAE 1080 steel (AFNOR XC70/XC80), 32HRC. The cover plate may be an additional, whole plate added to the stack and secured with screws (below, top), or an integrated plate made to embed into the ejector plate and secured with screws (below, bottom).
Page 32
RJG recommends the use of 8‑36 or 10‑32 (M4 or M5).
INSTALLATION SPECIFICATIONS (continued) LYNX CONNECTOR 1. Excess Cable Pocket Machine a pocket to store excess cable • and connectors at the Lynx connector 0.50” MIN wide (13,0 mm MIN [ at right]) by 2.00” MIN long (50,0 mm MIN [ right]) by 0.47”...
INSTALLATION SPECIFICATIONS (continued) SENSOR CABLES 1. Sensor Cable Channel Machine a cable channel pocket depth • of 0.375” (9,53 mm [ not shown]) for 0.50” (12,7 mm [ at right]) from center of sensor head. Machine remaining cable channels width • of 0.25” (6,0 mm [ at right]) and depth of 0.466”...
ANGLES = ±3° 30° TOR PIN AND SENSOR CONCENTRICITY MUST BE WITHIN [0.76] OR 10% OF EJECTOR PIN DIA, WHICHEVER IS LER. Description: LES-B-12 RJG, Inc. OT SCALE PRINT Sensor Installation K ALL SHARP EDGES, 0.005 [0.03] R MAX 3111 Park Drive NSIONS IN INCHES [MM], UNLESS NOTED Drawn: K.J.Brettschne...
INSTALLATION SPECIFICATIONS (continued) SENSOR CABLE RETENTION Sensor cable retention strategies must be considered during the mold design phase. Cables are often not the exact size needed, or do not easily remain in the cable channels during assembly and must be retained using one or more of the following methods. Cable Pocket Cover—Washer Style Cable Clip Cable Clip...
Page 37
If excess cable pockets are present, it may be useful to provide a cover ( right) for the cable pocket with which to retain extra cable. Though RJG does not currently provide a solution specifically for this application, plastic or metal discs with a centrally‑located hole, retained by a...
The following depicts such an installation. For assistance in designing an appropriate installation to prevent heat damage to the sensor electronics, contact RJG customer support (“Customer Support” on page 54). LES‑B‑127‑XXXX HIGH TEMPERATURE SENSOR...
Provide space in the sensor pocket for the (2,5 mm ) diameter or larger. Please sensor and static pin allowing for clearance contact RJG Customer Support for above the pin head equal to 1/5th of the installation of static pins smaller...
5. Pin and O‑Ring Bore Installation Use an O‑ring lubricant to help prevent damage when inserting the pin into the bore. Many silicone‑based lubricants can damage silicone O‑rings. RJG, Inc. recommends P‑80 THIX lubricant from International Products Corporation (http:// www.ipcol.com/shopexd.asp?id=31). Rotate the pin as it is being inserted to ease installation and limit potential O‑ring...
Page 41
NON‑STANDARD INSTALLATIONS (continued) 6. Sensor Readings Data from the same mold is pictured below (typical results—not guaranteed). Without O‑Ring Installation With O‑Ring Installation Above Left: Three sensors are reading too Above Right: The template and solid lines low due to contamination—without O‑rings after four months of continuous production;...
NON‑STANDARD INSTALLATIONS (continued) MULTIPLE EJECTOR PINS PIN, SENSOR, & PLATE INSTALLATION Ejector pins are often grouped in small areas that do not allow for traditional cavity pressure senor installation. Read and follow all instructions, and refer to the provided figures to properly install sensors with multiple ejector pins.
SENSOR INSTALLATION CHECK—CLAMP PLATE (TYPICAL) INSTALLATIONS Verify that the each sensor, transfer pin, and ejector pin pocket is machined correctly. PRE‑ASSEMBLY CHECKS 1. Indentation Test (with sensor) With the clamp plate disassembled, sensor in place, and cover plate removed, push the sensor and transfer pin forward;...
SENSOR INSTALLATION CHECK—CLAMP PLATE (TYPICAL) INSTALLATION (continued) With the ejector pin installed, push on the ejector pin; verify the clearance of 0.012” (0,3 mm (or 1/5 part thickness)) exists between the bottom of the ejector pin head and the ejector retainer plate surface. 4.
Page 47
SENSOR INSTALLATION CHECK—CLAMP PLATE (TYPICAL) INSTALLATION (continued) 1. Protrusion Test (without sensor) With the ejector and transfer pins installed, the ejector plate in injection position, and the ejector plate fixed towards clamp plate, press the ejector and transfer pin together, towards the cavity;...
SENSOR INSTALLATION CHECK—CLAMP PLATE (TYPICAL) INSTALLATION (continued) With the ejector and transfer pins installed, the ejector plate in the injection position, and the ejector plate fixed towards clamp plate, press the ejector and transfer pin together, away from the cavity; the ejector pin should recess in the ejector plate 0.008–0.01” (0,2– 0,3 mm).
Verify that the each sensor, transfer pin, and ejector pin pocket is machined correctly. PRE‑ASSEMBLY CHECKS 1. Indentation Test (without sensor) With only the transfer pin installed, push on the transfer pin head and verify a clearance of exists 0.012” (0,3 mm) MIN between the transfer pin head and retainer ejector plate surface.
SENSOR INSTALLATION CHECK—CLAMP PLATE (HEAD‑TO‑HEAD) INSTALLATION (continued) With the clamp plate disassembled, sensor in place, and cover plate removed, push the sensor and transfer pin forward; there should be 0.012–0.02” (0,3–0,5 mm) clearance between the sensor bottom and the clamp plate/sensor pocket bottom before the cover plate surface.
Page 51
SENSOR INSTALLATION CHECK—CLAMP PLATE (HEAD‑TO‑HEAD) INSTALLATION (continued) Verify that the each sensor, transfer pin, and ejector pin pocket is machined correctly. 1. Protrusion Test (without sensor) With the ejector and transfer pins installed, the ejector plate in injection position, and the ejector plate fixed towards clamp plate, press the ejector and transfer pin together, towards the cavity;...
SENSOR INSTALLATION CHECK—CLAMP PLATE (HEAD‑TO‑HEAD) INSTALLATION (continued) With the ejector and transfer pins installed, the ejector plate in the injection position, and the ejector plate fixed towards clamp plate, press the ejector and transfer pin together, away from the cavity; the ejector pin should recess in the ejector plate 0.008–0.01” (0,2– 0,3 mm).
Verify that the each sensor, transfer pin, and ejector pin pocket is machined correctly. PRE‑ASSEMBLY CHECKS 1. Indentation Test (with Ejector Pin) With the ejector pin installed, push on the ejector pin; verify the clearance of 0.012” (0,3 mm (or 1/5 part thickness)) exists between the bottom of the ejector pin head and the ejector plate surface.
Page 54
Verify that the each sensor and static pin pocket is machined correctly. 2. Protrusion Test (without sensor) With only the static pin installed, push on the static pin; verify the pin protrudes clearance above the pin head equal to 1/5th of the part thickness at pin location if part thickness is less than or equal to 0.06”...
A Valid sensor has raw counts that • of sensor. change when force is applied to the RJG, Inc. offers the following tools to test sensor; this indicates a properly working sensor. A No Reply sensor is not communicating •...
2% is more than sufficient, and is used force range (less than 40% of full scale) by RJG as the specification for repaired show less calibration shift than sensors that sensors.
While not directly PRODUCT DISCLAIMER related to the sensor calibration, the zero offset does provide indication that the RJG, Inc. is not responsible for the sensor’s calibration may be suspect. improper installation of this equipment, or any other equipment RJG manufactures.
TROUBLESHOOTING INSTALLATION ERRORS EJECTOR PIN ISSUES 1. Pin size, expected pressure,and/or expected temperature not appropriate for selected sensor. Refer to “Sensor and Ejector Pin Size” on • page 2. 2. Ejector pin is located behind mold surface with angle greater than 30° right).
INSTALLATION ERRORS (continued) SENSOR HEAD ISSUES 1. Ejector Pin head diameter is larger than sensor pocket diameter ( at right). Counterbore the ejector plate, or chamfer • the pin head to ensure that the pin rests only on the sensor nub. 2.
INSTALLATION ERRORS (continued) CASE AND CABLE ISSUES 1. Sensor cable is pinched during mold assembly ( at right). Product Manual | Lynx™ Embedded Sensors LES‑B‑127‑50/125/500/2000...
CUSTOMER SUPPORT Contact RJG’s Customer Support team by phone or email. RJG, Inc. Customer Support P: 800.472.0566 (Toll Free) P: +1.231.933.8170 email: support@rjginc.com www.rjginc.com/support Lynx™ Embedded Sensors LES‑B‑127‑50/125/500/2000 | Product Manual...
RELATED PRODUCTS COMPATIBLE PRODUCTS The LES‑B‑127‑50/125/500/2000 are compatible with other RJG, Inc. products for use with the eDART process control and monitoring system. LYNX CABLES CE‑LX5 The Lynx sensor cable ( at right) is a polypropylene‑coated cable suited for the heat and stress found in injection molding environments.
SIMILAR PRODUCTS RJG, Inc. offers a wide array of cavity pressure sensors for each application— strain gage, single‑channel, multi‑channel, and digital. LYNX EMBEDDED 4,000 POUND SENSOR The Lynx Strain Gage LES‑B‑159‑4000 button‑style sensor provides the same strain gage technology and indirect installation style as the LES‑B‑147‑50/125/500/2000 sensors,...
Page 66
P +39 335 178 4035 P +01 231 947‑3111 sales@it.rjginc.com F +01 231 947‑6403 it.rjginc.com sales@rjginc.com www.rjginc.com MEXICO RJG MEXICO SINGAPORE RJG (S.E.A.) PTE LTD Chihuahua, Mexico Singapore, Republic of P +52 614 4242281 Singapore sales@es.rjginc.com P +65 6846 1518 es.rjginc.com sales@swg.rjginc.com en.rjginc.com...
Need help?
Do you have a question about the Lynx LES-B-127-50 and is the answer not in the manual?
Questions and answers