Absolute Rotary Encoder Innovations by Netzer Precision
User Guide for Netzer Precision models including: VLS-60 Absolute Hollow Shaft Rotary Encoder Kit, VLS-60, Absolute Hollow Shaft Rotary Encoder Kit, Hollow Shaft Rotary Encoder Kit, Rotary Encoder Kit, Encoder Kit
2024-06-05 — Angular resolution. 18-20 bit. Nominal ... However, the manual Jitter test as part of the Manual Calibration process in section 13.4, would enable the.
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DocumentDocumentVLS-60 PRODUCT GUIDE Absolute Hollow Shaft Rotary Encoder Kit Encoder Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE Table of Contents 1. VLS Encoders Introduction ...............................................................................................................................................4 2. Technical Specifications .....................................................................................................................................................5 3. Ordering Code.......................................................................................................................................................................6 4. Mechanical Drawings..........................................................................................................................................................7 5. Mechanical Interface Control Drawing.........................................................................................................................8 6. Storage and Handling.........................................................................................................................................................9 7. ESD Protection.......................................................................................................................................................................9 8. Product Overview ......................................................................................................................................................... 9-10 8.1 Overview........................................................................................................................................................................................................9 8.2 Unpacking - Standard order .......................................................................................................................................................... 10 8.3 Installation flow chart ......................................................................................................................................................................... 10 9. Electric Encoder Software Installation....................................................................................................................... 11 9.1 Minimum requirements .................................................................................................................................................................... 11 9.2 Installing the software ........................................................................................................................................................................ 11 10. Mechanical Mounting................................................................................................................................................11-12 10.1 Encoder mounting - End-of-Shaft Installation .................................................................................................................... 11 11. Electrical Connection.................................................................................................................................................13-16 11.1 Absolute position over SSi or BiSS-C ......................................................................................................................................... 13 11.2 Digital SSi Interface............................................................................................................................................................................... 14 11.3 Digital BiSS-C Interface....................................................................................................................................................................... 15 11.4 Setup mode over NCP (Netzer Communication Protocol).......................................................................................... 16 11.5 Electrical connection and grounding....................................................................................................................................... 16 12. Signal Verification........................................................................................................................................................17-19 12.1 Starting the Encoder Explorer........................................................................................................................................................ 17 12.2 Signal verification process................................................................................................................................................................ 18 13. Calibration......................................................................................................................................................................20-29 13.1 Auto-calibration...................................................................................................................................................................................... 20 13.2 Manual calibration ................................................................................................................................................................................ 23 13.3 Setting the encoder zero-position.............................................................................................................................................. 27 13.4 Jitter test...................................................................................................................................................................................................... 29 14. Operational Mode............................................................................................................................................................. 29 9.1 SSi / BiSS ...................................................................................................................................................................................................... 29 1. VLS Encoders Introduction Designed to meet the requirements of the most demanding applications Embark on your next LEO project with the unparalleled Netzer VLS product line - the only space-proven COTS solutions engineered for excellence, with affordable prices. Our VLS series is designed to elevate your project, featuring compact dimensions, minimal weight, and the signature Netzer hollow shaft for unmatched precision. These characteristics are not just benefits; they're essentials for the demands of space exploration. With a legacy of transforming commercially available components and conventional encoders for the cosmos Netzer has accumulated a unique expertise through numerous successful missions. Our commitment to innovation means the VLS range meets the rigorous demands of TID (Total Ionizing Dose) and minimal outgassing - key factors for thriving in the harsh environment of space. The VLS encoders are characterized by the following features that sets them apart from other similar encoders: High Precision: < 0.006 degree Low Power Consumption: < 100 mAmp Space Proven Performance: TID (30 Krad) SEE (1E11 p/cm²/s protons @ 200MeV) + Low outgassing Parylene Conformal Coating: Improved Low outgassing (TML<1%, CVCM < 0.1%), reduces Tin Whiskers risk Innovative Hollow Shaft Design Low Profile: < 6 mm Extreme Temperature Durability: (including temp drift compensation) Rigorous Testing & Production: Shock, vibration, and ESS. Thermal vacuum optional Service Life: MTBF 15 years Customizable Reporting The holistic structure of the VLS Electric EncoderTM makes it unique. Its output reading is the averaged outcome of the entire circumference area of the rotor. This inherent design characteristic provides the VLS encoder with outstanding precision as well as a tolerant mechanical mounting. The absence of components such as ball bearings, flexible couplers, glass discs, light sources & detectors, along with very low power consumption, enables the VLS encoders to deliver virtually failure-free performance. 4 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE 2. Technical Specifications General Angular resolution 18-20 bit Nominal position accuracy ±0.010° Maximum operational speed 4,000 rpm Measurement range Single-turn, unlimited. Software Multi-turn Built In Test BIT Optional Rotation direction Adjustable CW/CCW* * Default same direction from bottom side of the encoder Mechanical Allowable mounting eccentricity ±0.1 mm Allowable axial mounting tolerance ±0.1 mm Rotor inertia 2,000 gr · mm² Total weight 16 gr Outer Ø / Inner Ø / Height 60 / 25 / 6 mm Material (stator / rotor) Polyimide Nominal air gap (stator, rotor) 0.6 mm ±0.3 mm Electrical Supply voltage Current consumption Interconnection Communication Output code Serial output Clock frequency Position update rate 5V ± 5% ~90 mA Cable (standard 250mm) SSi, BiSS-C Binary Differential RS-422 0.1-5.0 MHz 35 kHz (Optional - up to 375 kHz) Environmental EMC Operating temperature Storage temperature Relative humidity Shock endurance / functional Vibration functional Protection Low out-gassing Radiation tested for IEC 6100-6-2, IEC 6100-6-4 -55°C to +105°C (Optional +125°C) -55°C to +125°C 98% Non condensing 100g 6msec saw-tooth per IEC 60068-2-27:2009 40g 11msec saw-tooth per MIL-810G 7.7grms @ 20 to 2000 Hz per MIL-810G Category 24 Parylene conformal coating: improved low outgassing, reduces Tin Whiskers risk. TML < 1%, CVCM < 0.1% TID = 30KRAD SEE 11E1 p/cm²/s protons @200MeV Netzer Precision Position Sensors VLS-60-PG-V01 5 3. Ordering Code VLS - 60 - S G - M14 - S 0 - n n n n VLS Product Line Outer Diameter Output S SSi I BiSS Resolution Code Bit G 18 H 19 I 20 CPR 262,144 524,288 1,048,578 BIT (Built In Test): Optional [ ] None B BIT Multi-turn Resolution* 12 4,096 13 8,192 14 16,384 15 32,768 *The combination of single and multi should not exceeded more than 32 bit Custom Cable Length 0 250 mm Flying leads - 30AWG 1 500 mm Flying leads - 30AWG 2 750 mm Flying leads - 30AWG 3 1000 mm Flying leads - 30AWG 4 250 mm Flying leads - 28AWG 5 500 mm Flying leads - 28AWG 6 750 mm Flying leads - 28AWG 7 1000 mm Flying leads - 28AWG To add a connector contact us Cable Options S Jacket and shielded cable B Shielded cable W Wires only 6 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE 4. Mechanical Drawings 56.50 A A 0.05 A 0.1 A 16 A 0.1 A 0 0.05 0.1 A Netzer Precision Position Sensors 0.05 0.05 0.05 Unless otherwise specified Dimensions are in: mm Surface finish: N6 Linear tolerances 0.5-4.9: ±0.05 mm 5-30: ±0.1 mm 31-120: ±0.15 mm 121-400: ±0.2 mm VLS-60-PG-V01 7 5. Mechanical Interface Control Drawing Cable options Netzer Cat No. CB 00014 CB 00034 Cable type 30 AWG twisted pair x 3 28 AWG twisted pair x 3 Wire type 30 AWG 25/44 Tinned copper Insulation: PFA Ø 0.15 OD: Ø 0.6 ± 0.05 mm 28 AWG 40/44 Tinned copper Insulation: PFA Ø 0.12 OD: Ø 0.64 ± 0.05 mm Temp. Rating -55°C to +150°C Braided shield Thinned copper braided 95% min. coverage Jacket 0.45 silicon rubber (NFA 11-A1) 0.44 silicon rubber (NFA 11-A1) Diameter Ø 3.45 ± 0.16 mm Ø 3.53 ± 0.16 mm 30AWG twisted pairs x3 Braid shield Jacket 0.45 mm Ø 3.45 ±0.16 mm A2 A1 28 AWG twisted pairs x3 Braid shield Jacket 0.44 mm Ø 3.53 ±0.16 mm Pair# Color A1-A2 Red / Black A3-A4 Gray / Blue A5-A6 Green / Yellow * Space cable optional - CB-00200 according to ESCC 3901/019 8 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE 6. Storage and Handling Storage temperature: -55°C to +125 °C Humidity: Up to 98% non-condensing 7. ESD Protection As usual for electronic circuits, during product handling do not touch electronic circuits, wires, connectors or sensors without suitable ESD protection. The integrator / operator shall use ESD equipment to avoid the risk of circuit damage. ATTENTION OBSERVE PRECAUTIONS FOR HANDLING ELECTROSTATIC SENSITIVE DEVICES 8. Product Overview 8.1 Overview The VLS-60 absolute position Electric EncoderTM is a rotary position sensor developed for demanding Space applications. The Electric EncoderTM non-contact technology provides accurate position measurement through the modulation of an electric field. The VLS-60 Electric EncoderTM is a kit-encoder, i.e., its rotor and stator are separate. (1) Encoder stator (2) Encoder rotor Netzer Precision Position Sensors 1 2 VLS-60-PG-V01 9 8.2 Unpacking - standard order The package of the standard VLS-60 contains the encoder Stator & Rotor. Packed in a double vacuum with sealing bag. Optional accessories: (1) CNV-00003, RS-422 to USB converter (with USB internal 5V power supply path). (2) NanoMIC-KIT-01, RS-422 to USB converter. Setup & Operational modes via SSi /BiSS interface. (3) RJ VLS-60 rotary jig (4) DKIT-VLS-60-SG-S0, Mounted SSi encoder on rotary jig, RS-422 to USB converter and cables. (5) DKIT-VLS-60-IG-S0, Mounted BiSS encoder on rotary jig, RS-422 to USB converter and cables. 8.3 Installation flow chart Electric Encoder Software installation on PC Mechanical mounting Electrical connection Signal verification YES NO 10 VLS-60-PG-V01 Calibration Mounting correction Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE 9. Electric Encoder Software Installation The Electric Encoder Explorer (EEE) software: Verifies correct mounting for an adequate signal amplitude Calibration of offsets General set up and signal analysis This section describes the steps associated with installing the EEE software application. 9.1 Minimum requirements Operating system: MS windows 7/ 10, (32 / 64 bit) Memory: 4MB minimum Communication ports: USB 2 Windows .NET Framework, V4 minimum 9.2 Installing the software Run the Electric EncoderTM Explorer file found on Netzer website: Encoder Explorer Software Tools After the installation you will see Electric Encoder Explorer software icon on the computer desktop. Click on the Electric Encoder Explorer software icon to start. 10. Mechanical Mounting 10.1 Encoder mounting - End-of-Shaft Installation Typical encoder installation uses Mounting screws Socket Head Cup Screw 8xM2, 4 each per stator & rotor. Mounting dowel pins 4xØ2, 2 each per stator & rotor (not included with the encoder). Netzer Precision Position Sensors VLS-60-PG-V01 11 Encoder stator / Rotor relative position For proper performance the air gap should be 0.6 mm ±0.3 mm 0.6 mm In an optimal mounting, the signal amplitude values generated by the encoder, would be in the middle of the range of the signal plot shown in the Encoder Explorer software (see plot below). This may vary according to the encoder type. Verify proper rotor mounting with the Encoder Explorer tools "Signal analyzer" or "Signal verification process." Note: for more information please read section 7 12 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE 11. Electrical Connection This chapter reviews the steps required to electrically connect the encoder with digital interface (SSi or BiSS-C). Connecting the encoder The encoder has two operational modes: 11.1 Absolute position over SSi or BiSS-C This is the power-up default mode Electric EncoderTM CLK / NCP RX [+] (gray) CLK / NCP RX [-] (blue) Host System 5V DATA / NCP TX [-] (yellow) 5V DATA / NCP TX [+] (green) 120 Gnd (black) 5V (red) SSi / BiSS interface wires color code Clock + Grey Clock - Blue Data - Yellow Data + Green GND Black +5V Red SSi / BiSS output signal parameters Output code Serial output Clock Clock frequency Position update rate Clock Data Ground Power supply Binary Differential RS-422 Differential RS-422 0.1-5.0 MHz 35 kHz (Optional - up to 375 kHz) Netzer Precision Position Sensors VLS-60-PG-V01 13 11.2 Digital SSi Interface Synchronous Serial Interface (SSi) is a point to point serial interface standard between a master (e.g. controller) and a slave (e.g. sensor) for digital data transmission. Tr Master Clock 1 23 4 Encoder Data T MSB n-1 n-2 n-3 n n+1 Tp Tm LSB 0 MSB Tu Built In Test option (BIT) The BIT indicates critical abnormality in the encoder internal signals. '0' the internal signals are within the normal limits, '1' Error The Part Number of the encoder indicates whether the encoder includes BIT. If no BIT is indicated in the PN, there is no additional error bit. Tr Master Clock 1 23 4 Encoder Data T MSB BIT n-1 n-2 n+1 n+2 Tp Tm LSB 0 MSB n T f= 1/T Tu Tp Tm Tr fr=1/Tr Tu Description Recommendations Position resolution 12-20 Clock period Clock frequency 0.1-5.0 MHz Bit update time 90 nsec Pause time 26 - sec Monoflop time 25 sec Time between 2 adjacent requests Tr > n*T+26 sec Data request frequency 14 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE 11.3 Digital BiSS-C Interface BiSS C Interface is unidirectional serial synchronous protocol for digital data transmission where the Encoder acts as "slave" transmits data according to "Master" clock. The BiSS protocol is designed in B mode and C mode (continuous mode). The BiSS-C interface as the SSi is based on RS-422 standards. Built In Test option (BIT) The BIT indicates critical abnormality in the encoder internal signals. '1' the internal signals are within the normal limits, '0' Error The Part Number of the encoder indicates whether the encoder includes BIT. If no BIT is indicated in the PN, the error bit is always 1. Master Clock Encoder Data Ack Start 0 Position (bits) Err W CRC (6 bits) Timeout Bit allocation per encoder-resolution 17bit 18bit 19bit 20bit 27 28 29 30 Ack 26 27 28 29 Start 25 26 27 28 "0" 8...24 8...25 8...26 8...27 AP Description Period during which the encoder calculates the absolute position, one clock cycle Encoder signal for "start" data transmit "Start" bit follower Absolute Position encoder data Default Length 0 1/clock 1 1 bit 0 1 bit Per resolution 7 7 7 7 Error BIT (Built In Test option) 1 6 6 6 6 Warn. Warning (non active) 1 0...5 0...5 0...5 0...5 CRC The CRC polynomial for position, error and warning data is: x6 + x1 + x0. It is transmitted MSB first and inverted. The start bit and "0" bit are omitted from the CRC calculation. Timeout Elapse between the sequential "start"request cycle's 1 bit 1 bit 6 bits 25 s Netzer Precision Position Sensors VLS-60-PG-V01 15 11.4 Setup mode over NCP (Netzer Communication Protocol) This service mode provides access via USB to a PC running Netzer Encoder Explorer application (on MS Windows 7/10). Communication is via Netzer Communication Protocol (NCP) over RS-422 using the same set of wires. Use the following pin assignment to connect the encoder to a 9-pin D-type connector to the RS-422/USB converter CNV-0003 or the NanoMIC. Electric encoder interface, D Type 9 pin Female Description Color Function Gray SSi Clock / NCP RX Blue Clock / RX + Clock / RX - SSi Data / NCP TX Yellow Green Data / TX Data / TX + Ground Black GND Power supply Red +5V Pin No 2 1 4 3 5 8 Setup USB Blue Box or USB NanoMIC Electric Encoder Setup SSI / BiSS Electric Encoder Connect Netzer encoder to the converter, connect the converter to the computer and run the Electric Encoder Explorer Software Tool 11.5 Electrical connection and grounding Observe the following grounding consideration: 1. The cable shield electrically floating (unconnected) by default. 2. It's highly recommended to keep the motor PWM wires electrically shielded and/or kept away from the encoder. Note: 4.75 to 5.25 VDC power supply required 16 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE 12. Signal Verification 12.1 Starting the Encoder Explorer Make sure to complete the following tasks successfully: Mechanical Mounting Electrical Connection to the encoder Encoder Explore Software Installation Run the Encoder Explorer tool (EE) Ensure proper communication with the encoder: (Setup mode by default). The Encoder position-dial is colored blue when in Setup Mode, either through the NanoMic or the BlueBox (a). Note that the operational mode is not available through the BlueBox (b). The Signal amplitude bar indicates whether the signal is within the acceptable tolerance (c) . Note that prior to performing the Signal Verification process the bar could indicate an out of tolerance signal (d). Encoder data is displayed in the encoder data area (CAT No., Serial No.) (e). The position dial display responds to shaft rotation (f ). a f b e c d It is important to perform the Signal Verification process prior to the calibration of the encoder to ensure optimal performance. Netzer Precision Position Sensors VLS-60-PG-V01 17 12.2 Signal verification process The Signal Verification process ensures that the encoder is mounted correctly and provides good signal amplitudes. This is performed by collecting raw data of the fine and coarse channels during rotation. Select <Signal Verification> on the main screen (a). a Select <Start> to initiate the process (b). b Rotate the shaft in order to collect the fine and coarse channels data (c). c 18 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE If the process is successful, the status "Signal verification successful" would appear (d). The `amplitude circle' would be centered between the two green circles, preferably in the middle of the tolerance (e). d e Note however, that mounting the encoder towards the extreme mechanical tolerances might cause the amplitude circle to be offset from the exact middle of the nominal position. If the signal is out of tolerance the Error notification "Amplitude is lower/higher than the min/max limit of XXX" would appear (g). In Addition, the status "Signal verification failed perform calibration amplitude" would appear at the top (h). h g Stop the process and re-mount the encoder, making sure that the mechanical installation tolerances are not exceeded, removing or adding shims as required. Repeat the Signal Verification process after the remount. Once the signal verification process is successfully completed, proceed to the encoder calibration phase, Section 13 Netzer Precision Position Sensors VLS-60-PG-V01 19 13. Calibration It is important that upon every installation of the encoder, the Signal Verification process is completed prior to attempting calibration of the encoder. For encoders with FW 4 version 4.1.3 or higher, it is possible to select either a fully automated calibration process, or a manual phase-by-phase calibration process. 13.1 Auto-calibration Auto Calibration is supported by encoders with FW 4 version 4.1.3 or higher. For these encoders an additional "Auto-calibration" button is displayed. 13.1.1 Auto-calibration process The Auto-calibration process consists of three stages: 1. Jitter test - evaluates the electric noise for the Fine, Medium, and Coarse encoder channels. During the jitter test, the shaft must be stationary. Attention! The Pass/Fail criteria of the Jitter test is according to very strict factory criteria and failing it would abort the Auto Calibration process. However, the manual Jitter test as part of the Manual Calibration process in section 13.4, would enable the user to decide whether the jitter is acceptable to its needs. 2. Offset calibration - performs the offset calibration, the shaft must rotate continuously. 3. Absolute Position (AP) calibration - performs Coarse Amplitude Alignment (CAA) and Medium Amplitude Alignment (MAA) are calculated. During Auto-Calibration process the encoder's Zero-Position remain in the factory default zero position for new encoders. It is possible to set the Zero Point through the top menu bar, by selecting "Calibration" tab, and clicking "Set UZP" as defined in section 13.3. 20 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE 13.1.2 Performing Auto-calibration Press the <Auto-calibration> button. The main auto-calibration window opens. Select the appropriate measurement range applicable to your application (a). a Make sure to keep the shaft still and press the <Start> The Noise test would be performed and upon successful completion the "Noise test"label will be marked with a green check mark. The Offset calibration would automatically start upon completion of the Noise test. This calibration requires that the shaft be rotated continuously. The AP calibration would automatically start upon completion of the Accuracy Calibration. Continue rotating the shaft in this phase until the AP calibration is completed, and the encoder is reset. Once the reset is over, the Auto-calibration process is successfully finished. c b The user can review the calibration results by clicking the <View data> button (b). Netzer Precision Position Sensors VLS-60-PG-V01 21 It is always possible to abort the Auto Calibration process by clicking the <Abort> button (c). 13.1.3 Auto-calibration failures If a test fails (for example the Noise test) the result will be marked with in red X. If the calibration process failed, corrective recommendations will be displayed, corresponding to the element which had failed the test. 22 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE d It is possible to review detailed information regarding the failure, by clicking the <Detailed data> button (d). 13.2 Manual calibration The Manual calibration process consists of the following stages: 1. Offset calibration - performs the offset calibration, the shaft must rotate continuously. 2. CAA / MAA Calibration - performs Coarse Amplitude Alignment (CAA) and Medium Amplitude Alignment (MAA) are calculated 3. Zero Position Set - Used to determine a Zero Position other than the factory default. 4. Jitter Test - Used to determine the amount of jitter and allow the user to decide if acceptable. Netzer Precision Position Sensors VLS-60-PG-V01 23 Select <Manual Calibration> on the main screen (a). a 13.2.1 Offset calibration In this process, the DC offset of the sine and cosine signals are compensated over the operational sector (offset calibration). Click <Start data acquisition> (b). Rotate the shaft continuously during data collection, covering the whole working sector of the application from end to end. The progress bar (c) indicates the progress of the data collection. Rotation speed is not a parameter during data collection. By default, the procedure collects 500 points. The collected data for the fine / coarse channels, should be a clear "thin" circle which appears in the center of the plots (d) (e) with a possible slight offset. c b d e f When offset calibration is completed, click on <Continue to CAA/MAA Calibration> button (f ). 24 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE 13.2.2 Calibration of Coarse Amplitude Alignment (CAA) & Medium Amplitude Alignment (MAA) The following calibration aligns the coarse channel, and medium channel in certain encoders, with the fine channel by collecting data from each point in both channels. This is performed to make sure that every time the encoder is turned on, it would provide an accurate absolute position. Select the relevant option from the Measurement Range options (a): Full mechanical rotation - shaft movement is over a full 360 degrees rotation (that is the recommended calibration). Limited section - shaft has a limited rotation angle which is less than 360 degrees. In this mode you need to input the rotation range by degrees. Free sampling mode - sets the number of calibration points in accordance with the total number of points in the text box. The system displays the recommended number of points by default. The minimum points over the working sector is nine. Note that the Total number of points would change to the optimal default according to the selected measurement range above. Click the <Start Calibration> button (b). a b Netzer Precision Position Sensors VLS-60-PG-V01 25 The Calibration process control (c) indicates the current position, and the next target position to which the shaft should be rotated. Rotate the shaft to the next position, stop and click the <Continue> button to sample the position (d). The shaft should be at STAND STILL when clicking the button. e d c f The Shaft movement status (e) indicates the shaft movement status. Complete the sampling process using the following routine: positioning the shaft --> stand still --> clicking <Continue> (d) to sample the position. When the process is completed click the <Apply and Continue to UZP> button (f ). 26 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE 13.3 Setting the zero-position of the encoder Select one of the options for setting the zero point and click <Apply and close>. It is possible to set either current position or rotate the shaft to any other position to be set as the zero point. It is also possible to set the Zero Point through the top menu bar, by selecting "Calibration" tab, and clicking "Set UZP". Netzer Precision Position Sensors VLS-60-PG-V01 27 13.4 Jitter test The jitter test is used evaluate the level of electric noise. Common jitter should be up +/- 3 counts; higher jitter may indicate system noise and would require better grounding or shielding of the electric noise source. Select "Calibration" tab, and click "Jitter Test" Select the Jitter test mode (a). Set the Timing and Sampling parameters (b). Click <Start> button (c) and check if the results (d) are within acceptable tolerances for the intended application. b a c d 28 VLS-60-PG-V01 Product Guide Absolute Hollow Shaft VLS-60 Rotary Encoder Kit Encoder PRODUCT GUIDE Another indication of excessive jitter/noise when the blue dots in signal amplitude circle are not evenly distributed on a thin circle as appears below. Excessive jitter/noise Low jitter/noise 14. Operational Mode 14.1 SSi / BiSS Operational Mode indication of the SSi / BiSS encoder interface is available by using the NanoMIC to connect with the encoder. When in Operational Mode the color of the position dial is orange. For more information read about NanoMIC on Netzer website The operational mode is using SSi / BiSS interface with 1MHz clock rate. The encoder position-dial is colored orange when in Operational Mode. The bar below the dial, is the corresponding binary word output for the current shaft position (a). SSi Protocol BiSS Protocol a Netzer Precision Position Sensors a VLS-60-PG-V01 29 VLS-60-PG-V01 Corporate Headquarters ISRAEL Netzer Precision Position Sensors A.C.S. Ltd. Misgav Industrial Park, P.O. Box 1359 D.N. Misgav, 2017400 Tel: +972 4 999 0420 USA Netzer Precision Position Sensors Inc. 200 Main Street, Salem NH 03079 Tel: +1 617 901 0820 www.netzerprecision.com Copyright © 2024 Netzer Precision Position Sensors A.C.S. Ltd. All rights reserved.