ENC 150™ REFERENCE MANUAL ACU-RITE ®
ENC150 Table of Contents Page Introduction .......................................................................... 2 Mounting Preparation .......................................................... Mounting Information ......................................................... Encoder Dimensions ............................................................ Backup Spar Dimensions ..................................................... Page Spar Installation Procedure .......................................
Introduction / Supplied Items ENC 150 The ENC 150 precision glass scale linear encoder provides the accuracy and reliability of an ACU-RITE measuring system with digital output (analog output available). Features and options include: For future ordering information or warranty service, record the linear encoder catalog number located on the scale assembly tag, and the serial number from the reading head tag. • • • • • Axis # 1: Axis # 2: Axis # 3: Axis # 4: Resolutions of .5, 1, 2, 5, or 10 µm.
ENC150 Mounting Preparation Please follow these preparation guide lines. • • • • Understand your mounting requirements. Mount with lip seals down and away from the work area. Brackets should be kept as short as possible and rigid. Surfaces must be in good condition, clean, and free of dirt. Remove paint from machined mounting surfaces. • Alignment brackets must not be removed until instructed. 1.150 1.150 “L” “L” = Measuring length + 1.
Mounting Information ENC150 Use this information to plan your Linear Encoder installation. 1.876 .010 [47.6] • Mount the linear encoders close to machine guide ways to ensure system accuracy. • One side of the linear encoder addresses flush mounting surfaces, and the opposite side addresses offset mounting surfaces. • If space between the reading head and the mounting surface exceeds .18”, use a spacer or mounting bracket to reduce space.
ENC150 Encoder Dimensions Measuring length + 6.375 .469 [11.9] .810 [20.6] Measuring length + 5.437 .750 [19.0] Scale case .944 [24.0] Mounting hole ∅ .500 C’bore ∅ .313 Thru .700 [17.8] .285 [7.2] .562 [14.3] End Cap 1.12 1.876 [28.5] [47.6] .937 [23.8] .121 [3.11] .370 [9.4] .56 [14.4] 1.125 [28.6] ∅ For 8-32 (or M4) SHCS mounting screw .32 [8.4] Armor 2.250 [57.1] .570 [14.5] .810 [20.5] 1.25 [32] Min. bend rad. .20 [5.2] Vinyl 1.060 [27.0] .750 [19.0] Reading Head assembly 1.440 [36.
Backup Spar Dimensions Backup spar Part Number 385102-000 385104-000 385106-000 385107-000 385108-000 385110-000 385112-000 385113-000 385114-000 385116-000 385118-000 385120-000 385122-000 385124-000 385126-000 385128-000 385130-000 385131-000 - ENC 150 Linear Encoder Measuring Length 2 4 6 7 8 10 12 13 (Special) 14 16 18 20 22 24 26 28 30 31.5 - L A 8.312 10.312 12.312 13.312 14.312 16.312 18.312 19.312 20.312 22.312 24.312 26.312 28.312 30.312 32.312 34.312 36.312 38.030 - 1.656 2.656 1.156 1.
ENC150 Mounting Requirements Mounting options can be adapted to machine mounting surfaces using spacers, standoffs, or leveling set screws. Center support 1/4-20 x 3/4” SHCS Support washer • Measuring length and mechanical configuration of your machine determine your options. • Backup spar mounting is an option but not required for lengths up to 60”. • Fastener lengths described on this page are included with the encoder or the backup spar. Scale washer .94 [23.
Typical Mounting (s) ENC 150 A variety of mounting conditions can be accommodated. Offset surfaces • The machine configuration determines the brackets required to install the linear encoder. • Three typical mounting conditions are shown; flush, offset, and backup spar (as shown previously on page 4). • The 8-32 SHCS fastener lengths shown on this page are supplied with the encoder hardware. • The 8-32 SHCS for mounting the reading head is a standard low head style fastener.
ENC150 Encoder Installation Procedure These steps apply to all encoder mounting conditions, if a spar is being used, go to “Spar Installation Procedure” on page 11. • ACU-RITE bracket kit instructions supercede this section. • Adjust drill depths and fastener lengths as required. • When instructed on page 10: Adjust the leveling set screws as follows: 1. Insert, but do not tighten 8-32 (M4) reading head screws. 2. Place a .001”-.003” shim between the leveling set screws and mounting surface. 3.
Encoder Installation Procedure ENC 150 Drill / tap for 8-32 (M4) -A- = Axis travel -A- Drill / tap for 1/4-20 (M6). 8-32 x 3/4” SHCS (M4 x 20mm) Align to within .010” TIR to -A- Do not tighten prior to adjusting leveling set screws 1/4-20 x 1” BHCS & Scale flat washer (M6 x 25mm) • Drill / tap the first end mounting hole / attach the linear encoder. • Align to within .010” TIR. to -A-, drill / tap second end hole. • Attach the linear encoder / align to within .010” TIR. to -A-.
ENC150 Spar Installation Procedure These steps apply to all spar mounting conditions. • ACU-RITE bracket kit instructions supercede this section. • Adjust drill depths and fastener lengths as required. • When instructed on page 12: Adjust the leveling set screws as follows: 1. Insert, but do not tighten 8-32 (M4) reading head screws. 2. Place a .001”-.003” shim between the leveling set screws and mounting surface. 3. Adjust each set screw until a slight drag is felt on the shim. 4.
Spar Installation Procedure ENC 150 M4 x 8mm set screws 8-32 x 5/8” SHCS (M4 x 16mm) Do not tighten prior to adjusting leveling set screws. • Insert the encoder into the spar. • Center the encoder from end to end with the spar. • Lock in place by tightening the M4 set screws. • Attach the bracket to the machine. • Align the reading head mounting holes with the bracket holes. • Attach head to bracket / Set leveling screws / Secure fasteners.
ENC150 Checking Your Installation These steps will confirm proper operation of your installation. The counting Test confirms proper electrical operation. the Repeatability Test checks the installation integrity Connecting Provide slack loops Secure excess cable Counting Test: • Configure the readout’s encoder and display resolution (see manual). • Move the axis and compare the display to the movement. • Configure readout for sensing reference marks.
Electrical Shielding ENC 150 Connect a ground wire from the terminal on the back of the readout to the machine or earth ground. Attach a ground wire from the machine to a solid earth ground. With the encoder attached to the machine and the cable connected to the readout, check shielding by measuring resistance between connector housing and scale unit. Desired value: 1 Ω max.
ENC 150 If you experience difficulties with your installation, do the following to determine the problem. Checking the Readout Difficulties on more than one axis are usually associated with the readout. Follow these steps to determine if your difficulties are associated with the readout: • Insure that the linear encoder connectors are correctly seated. • Swap linear encoder cables at the readout to see if the problem is still shown in the same display.
Mechanical Specifications ENC150 Mechanical Specifications Resolution Digital 2 µm Grating pitch Scale medium 10 µm Analog 0.5 µm 40 µm 1 µm 5 µm 20 µm 40 µm Light transmission through chrome-coated glass Accuracy (@ 20° C) / 1000mm ± 3µm, ± 5µm Max. slew speed 40 inches/sec Force required to move reading head < 0.
ENC 150 Output Signals and Pin-Outs Digital Differential Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 N/C Green Yellow Blue Red White Brown Pink Gray N/C Channel A+ Channel A- Ground Vcc, + 5.1 ± 0.1 VDC @ 140mA max. Channel R+ Channel R- Channel Channel B+ B- Analog Differential 1 5 6 9 Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 White Green Yellow Blue Red N/C Brown Pink Gray Ground Channel A+ Channel A- N/C Vcc, + 5.0 ± 0.
Electrical Specifications Parameter ENC150 Digital Output Signals Analog IOH=(High level output current) = 20mA VOH=(High level output voltage) >2.5Vdc 360° 0° 1 1 Channel R+ Channel A+ 0 0 1 Channel AChannel R- 1 0 0 90° 1 1 Count Channel B+ 0 1 Channel B0 0° IµA 90° 360° Channel A 135° ± 20° IµA IR:2-8 µApp Channel R 360° ± 60° IOL=(Low level output current) = 20mA VOL=(Low level output voltage) < 0.5Vdc Incremental signals Square-wave voltage signals.
ENC 150 ACU-RITE products and accessories are warranted against defects in material and workmanship for a period of three years from the date of purchase. ACU-RITE will, at its option and expense, repair or replace any part of the ACU-RITE product which fails to meet this warranty. This warranty covers both materials and factory labor. In addition, authorized ACU-RITE distributors will provide field service labor for a period of one-year at no charge.
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