SENC 150 REFERENCE MANUAL ACU-RITE 516291-21_Ve00_SENC_150.
516291-21_Ve00_SENC_150.
SENC 150 Table of Contents Page Introduction / Supplied items .................................................. 2 Page Spar Installation Procedure . ..................................................... 12 Checking the Installation ......................................................... 14 Electrical Shielding ................................................................ 15 Troubleshooting ..................................................................... 16 Mounting Preparation ...............
Introduction / Supplied Items SENC 150 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. Catalog No. Serial No.
SENC 150 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 SENC 150 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.
SENC 150 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 Ø .500 C’bore Ø .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 [3.1] .370 [9.4] .56 [14.4] Ø For 8-32 (or M4) SHCS mounting screw 1.125 [28.6] .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] Reading Head assembly 1.440 [36.6] 2.
Backup Spar Dimensions [mm] Backup Spar Part Number 680116-01 680116-02 680116-03 680116-04 680116-05 680116-06 680116-07 680116-08 680116-10 680116-11 680116-12 680116-13 680116-14 680116-15 680116-16 680116-18 680116-20 680116-22 680116-24 680116-26 680116-28 Linear Encoder Measuring Length 25.40 50.80 76.20 101.60 127.00 152.40 177.80 203.20 254.00 279.40 304.80 330.20 (Special) 355.60 381.00 406.40 457.20 508.00 558.80 609.60 660.40 711.20 SENC 150 L A 185.72 211.12 236.52 261.92 287.32 312.72 388.
SENC 150 Backup Spar Part Number 680116-01 680116-02 680116-03 680116-04 680116-05 680116-06 680116-07 680116-08 680116-10 680116-11 680116-12 680116-13 680116-14 680116-15 680116-16 680116-18 680116-20 680116-22 680116-24 680116-26 680116-28 Backup Spar Dimensions inch Linear Encoder Measuring Length 1 2 3 4 5 6 7 8 10 11 12 13 (Special) 14 15 16 18 20 22 24 26 28 “A” ± .015 L A 7.312 8.312 9.312 10.312 11.312 12.312 13.312 14.312 16.312 17.312 18.312 19.312 20.312 21.312 22.312 24.312 26.312 28.
Mounting Requirements SENC 150 Mounting options can be adapted to machine mounting surfaces using spacers, standoffs, or leveling set screws. 1/4-20 x 3/4” SHCS Center support 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.
SENC 150 Typical Mounting (s) A variety of mounting conditions can be accommodated. Offset surfaces 1/4-20 x 1” BHCS with encoder washer • 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.
Encoder Installation Procedure SENC 150 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.
SENC 150 Encoder Installation Procedure -A- = Axis travel 8-32 x 3/4” SHCS (M4 x 20mm) -A- Drill / tap for 1/4-20 (M6). Align to within .010” TIR to -A- Drill / tap for 8-32 (M4) 1/4-20 x 1” BHCS & Scale flat washer (M6 x 25mm) Do not tighten prior to adjusting leveling set screws • 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-.
Spar Installation Procedure SENC 150 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.
SENC 150 Spar Installation Procedure 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.
Checking Your Installation SENC 150 These steps will confirm proper operation of your installation. The Counting Test confirms proper electrical operation. The Repeatability Test checks the installation integrity. 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. • Move each axis a minimum of 20mm (axis display should zero).
SENC 150 Electrical Shielding 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. 15 516291-21_Ve00_SENC_150.
Trouble Shooting SENC 150 Follow these steps to determine the cause of your system difficulties: • Confirm that your bracketry and installation does not interfere with other machine structures through the entire length of the linear encoder travel. • Check for loose fasteners. If you find loose fasteners, first confirm that the linear encoder is installed to the tolerances specified and then retighten the fasteners as required.
SENC 150 Mechanical Specifications Mechanical Specifications Resolution Digital 0.5 µm Grating pitch Analog 1 µm 5 µm 20 µm Scale medium Light transmission reflective off of nickel coated glass Accuracy (@ 20° C) / 1000mm ± 3µm, ± 5µm Max. slew speed 40 inches/sec Force required to move reading head < 0.
Output Signals and Pin-Outs SENC 150 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 Channel A+ Channel A- Channel B+ Vcc, + 5.1 ± 0.1 VDC Channel R+ Channel R- N/C Channel Ground B- 1 5 6 9 Analog Differential 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 Channel A+ Channel A- Channel B+ Vcc, + 5.0 ± 0.
SENC 150 Electrical Specifications Parameter Output Signals Digital Analog IOH=(High level output current) = 20mA VOH=(High level output voltage) >2.5Vdc 1 Channel A+ 0 Channel A- 1 0 0° 360° Channel R+ Channel R90° 0° 90° 1 Channel B 0 1 Channel A Incremental signals IA, B:7-16 µApp or 1.0 Vpp 0 1 Count 1 (Phased) 0 1 Channel B0 – IOL=(Low level output current) = -20mA VOL=(Low level output voltage) < 0.6Vdc Channel B+ 360° Channel R IR:2-8 µApp or 1.
Warranty SENC 150 For Warranty information, go to www.acu-rite.com. ACU-RITE ® 516291-21_Ve00_SENC_150.
516291-21_Ve00_SENC_150.
HEIDENHAIN CORPORATION 333 East State Parkway Schaumburg, IL 60173-5337 USA +1 (847) 490-1191 +1 (847) 490-3931 E-Mail: info@heidenhain.com www.heidenhain.com ACU-RITE 516291-21 Ver 00 516291-21_Ve00_SENC_150.