...at the cutting edge

Transcription

1 Linear Encoders

2 Company Profile Newall was founded in Peterborough, England in 9 and is now a division of CST (Custom Sensors & Technologies), a business unit of Schneider Electric. During this time, Newall has dedicated itself to providing the automation, machine tool and other machinery and production industries with leading edge technologies that increase productivity and machine tool efficiency. Over the years Newall has grown to be a well respected leader in Digital Readout (DRO) and Linear Encoder technology. Newall s world renowned range of Digital Readout Systems (DROs) are specifically designed and dedicated to increasing machine productivity. Together with the Spherosyn and Microsyn Linear Encoders, they are some of the most advanced, market-leading readouts available on the market today. Features Linear Encoders The range of Linear Encoders provided by Newall incorporate a truly unique design in that none of the electrical or measuring components are exposed to harsh workshop environments and they will continue to provide accurate and reliable readings even when fully submerged in water, oil and coolant. For this reason all of the Newall Linear Encoder range carry an IP7 (NEM ) environmental rating. This means they are dust tight and protected against the effects of total water immersion up to m. The range includes incremental, absolute and distancecoded variants and are available with industry standard output signals which can be interfaced with all major CNC, NC, PLC and PC products. IP Protection Levels The chart clearly defines levels of IP ratings and should be used as a guide during the specification and design process. IP7 rating (NEM ) Withstands dust, swarf, oil and other harsh environmental conditions No mechanical wear characteristics Requires no cleaning or maintenance High tolerance to shock and vibration High reliability st IP# Degree of protection against access to hazardous parts & ingress of solid objects No protection Protected against solid foreign objects of mm Ø and > Protected against solid foreign objects of.mm Ø and > Protected against solid foreign objects of.mm Ø and > Protected against solid foreign objects of.mm Ø and > Dust protected Dust tight nd IP# 7 Degree of protection against the ingress of water No protection Protected against vertically falling water drops Protected against vertically falling water drops when enclosure titled up Protected against spraying water Protected against splashing water Protected against water jets Protected against powerful jets from any direction Protected against the effects of total water immersion up to M Protected against the effects of total water immersion beyond M...at the cutting edge

3 Encoder Selection Guide Linear Encoder Overview Incremental Linear Encoders Newall s Incremental Linear Encoders comprise of a scale and reader head that contains a coil assembly and supporting electronics, which provide quadrature square wave or sine-cosine feedback signals that allow for direct integration to servo driven applications. These encoders operate on the principle of electromagnetic induction. n electromagnetic field is generated by inducing a khz sinusoidal current through a single drive coil within the reader head. This field interacts with the nickel chrome elements contained in the scale. set of four pickup coils detect variations in the induced field which are then combined and processed by the electronic circuitry to generate a signal that varies as the reader head moves along the scale. Depending on the position of the reader head as it passes over each element, the phase shift of this pickup signal relative to the drive signal will vary between and degrees. High speed Digital Signal Processing (DSP) converts the analogue signal to an industry standard signal, which also generates the periodic reference marker pulse. bsolute Linear Encoders Newall s bsolute Linear Encoders provide a true absolute position upon power up. The linear encoder does not use batteries or static memory to retain the position data. Like Incremental Linear Encoders, the scale is comprised of a stainless steel tube that houses a column of precision nickel-chrome elements. For absolute and single point reference mark versions, coded scale inserts are placed between the elements in such a manner as not to interfere with the geometry of the system contact. The bsolute Linear Encoder reader head also contains a sensor array that detects the target that is embedded in the coded scale inserts. High speed digital signal processing is utilised in order to process the positional data and to communicate the output protocols. Distance-Coded Linear Encoders Newall s Distance-Coded Linear Encoders, using its internal absolute position count, can mimic the distance coded index marks that are generated by glass scales. n index pulse is generated at uniquely spaced intervals in the range of to mm, varying by micron increments. s the encoder is not constrained by any hardware limitations, it can calculate and output almost any sequence of marker pulses. Measuring Length Incremental Linear Encoders Single Scale m* Modular m + Up to m Up to m Up to m ±µm ±µm ±µm ±µm bsolute Linear Encoders Up to.m Measuring ccuracy** ±µm +µm/m ±µm Distance-Coded Linear Encoders Standard Resolution** µm µm via SCC µm,, µm Page Page Page Page µm Page µm via SCC µm µm Page Page Page µm Page Page Output Signal TTL RS Differential Quadrature Vpp Signal Period Vpp Single Point Signal Period TTL Single Point RS Differential Quadrature - (Vin Vout) - (Open Collector) TTL RS Single Point Differential Quadrature TTL RS Differential Quadrature Periodic Point TTL RS Differential Quadrature Vpp Signal Period TTL RS Differential Quadrature Vpp µm Signal Period via SCC (included) Magnetic Tape System RS + RS Differential Quadrature SSI inary + RS Differential Quadrature SSI Gray Code + RS Differential Quadrature RS + RS Differential Quadrature Faunc SSI Gray Code with Even Parity + RS Differential Quadrature SSI Gray Code with Even Parity + Vpp µm signal period via SCC (included) Encoder Model MG-TS Up to.m ±µm µm Page Distance-Coded TTL RS Differential Quadrature SHG-TC Notes to Selection Guide ll of these encoders can be connected to a wide range of PLC, CNC, NC and PC applications. The choice of encoder depends on five principal factors:. The level of precision required for the application e.g., in general, a saw conveyor requires a lower level of precision than a grinding machine. Spatial limitations. The slim-line encoders can be fitted into smaller spaces then the full-sized encoders.. The overall measuring length of the application. The required resolution. The output signal ccuracy defined as per meter * For longer modular scale requirements refer to factory ** Further options for resolution and accuracy are available. Please refer to pages above SHG-TT SHG-VP SHG-VS SHG-TS SHG-PV SHG-PC SP-TS SP-TT MHG-TT MHG-VP MCG-TT MCG-VP SHG- SHG- SHG-G SHG- SHG-F SHG-S SHG-V

4 Technology Incremental Nickel chrome elements lignment surfaces Reader head Drive coils Pick-up coils Hybrid printed circuit board featuring DSP Stainless-steel tube Signal cable Sectional view Newall s SHG technology is an inductive linear encoder, made up of two main assemblies; the reader head and the scale. The scale is a stainless steel tube, housing a column of precision elements. The elements are maintained under compression; the compression load being set during manufacturing to calibrate the scale. The reader head, which fits around the scale, moves in a linear motion along the scale length comprising a rectangular aluminium casting containing a coil assembly and electronics. Incremental Figure shows the arrangement of coils in the head. There are six sets of pick-up coils. Each set consists of four identical windings that are spaced at intervals of one pitch. s a result of this spacing each coil in a set is positioned over an identical part of an adjacent element. ll the coils of a set are connected together in series. Over the pick-up coils is the drive coil. The elements within the scale cause the permeability of the scale to vary periodically over a pitch. The voltages induced in each of the sets of pick-up coils vary according to the relevant positions of the coils to the underlying elements. Figure rrangement of Coils Pick-up Coils Incremental Cover Scale (showing elements) C D C D C D C D C D C D The variation of the amplitude of the induced signals with displacement along the scale is shown in Figure a. The coils are spaced such that when one set of coils is at a maximum, (e.g. set ) another set spaced one half an element pitch away (set C) will be at a minimum. These coil pairs are combined differentially to produce signals that vary with displacement as shown in Figure b. These combined signals are phase shifted by the electronic circuits in the head. The -C signal is advanced and the D- signal is retarded. These signals are added together and filtered. The result is an output signal whose phase varies as the head is displaced along the scale. Technology Incremental Signal amplitude (at KHz) Figure a D C D- -C p/ p/ p/ P Displacement (element pitch) Figure b M cos (:Pi/p) The phase changes by for each pitch of movement. This output signal is at the fundamental frequency of khz and has a peak to peak amplitude of approximately V and a DC level of around V. Thus the position measured is absolute over a single element, i.e., for every.7mm increment. Figure shows a phase shift of 9 that equates directly to a position of.7mm ( / of a pitch) relative to the zero phase position. To achieve linear measurement the total position is constructed by the addition of the absolute measurement value and the sum of the number of elements traversed since the encoder was referenced. Encoders of position sensors can be broadly categorised into two families, DC operation or C operation. In the DC operation lie optical and magnetic encoders, both rotary and linear. Devices that use C operation are either inductive or capacitive. Examples of rotary inductive devices are resolvers and syncros whilst linear devices include LVDTs, Inductosyn and Newall Linear Encoders. Figure Drive Signal Msin (Pi/p) Phase Shift One Pitch In C systems, the signals containing the positional data are modulated C signals at the fundamental operating frequency of the device. In DC systems the signals are modulated DC, i.e., slowly varying DC levels. DC signals are particularly subject to offset errors, drift and low frequency noise. Offset errors can be countered by the use of technique chopper stabilisation which, effectively, converts the signal to C to eliminate the offset and then converts back. In C systems the nulling of offset errors is inherent in the C coupling used and no complex techniques need be applied. Drift is a problem in DC systems, particularly optical where the lamps, LEDs or solar cells are subject to long term ageing. Inductive systems are inherently stable being based on fixed physical properties such as turn ratios and permeability of the encoder parts. These do not change with time. Low frequency noise, particularly mains power frequencies, can interfere with DC signals and cannot be blocked without severely degrading the system s response time. C systems, working at a precise, fixed frequency, will employ low and high frequency filters without impacting upon response speed. criticism often aimed at inductive encoders is that their relatively long pitch length requires a much larger interpolation level for a given resolution than for an optical grating. This is true but, it is not mentioned that accurate interpolation is much more easily achieved, for the reasons given above, on C systems than DC. The accuracies and resolutions that can be obtained from resolvers match those of their optical rotary counterparts. The same is true for Newall s linear encoders versus its linear optical or magnetic competitors. C D C D C D C D C D C D Signal mplitude Time Virtual Element Drive Coils Reader Head Measured Signal 7

5 Technology bsolute Technology Magnetic bsolute bsolute Magnetic Tape Principal of Operation The Newall bsolute Linear Encoder is a breakthrough in linear measurement technology. Uniquely coded inserts are placed between the precision nickel chrome elements in the scale. The inserts are locked in position as part of the manufacturing process and contain a small magnetic target that can be detected by a series of hall sensors contained within the reader head. The density of the inserts and the detectors within the reader head allows the system to determine absolute position on power up. Once the encoder has internally determined the true absolute position it is then a matter for the DSP processing to handle communications of the positional data to the outside world through the use of communications protocols such as SSI (Synchronous Serial Interface), Fanuc, RS, RS etc. Furthermore, the internal positional information can be used to accurately emulate other forms of Pseudo-bsolute interfaces such as Distance-Coded. eing a Digital Sound Processor (DSP) based absolute system capable of a high level of processing, the encoders are error mapped during manufacturing against a laser interferometer. This error map is stored in FLSH memory allowing it to be applied in real-time thus resulting in a highly accurate system. Distance-Coded Distance-Coded reference markers allow the controller to acquire absolute position by moving the encoder system across two uniquely spaced reference marks. y using its internal absolute position count, a variant of the bsolute can mimic the Distance-Coded index marks that are generated by glass scales. The Newall MG-TS encoder comprises of a flexible tape scale which is mounted on a fixed surface of the machine, with or without an optional twin track backing bar, and a reader head which is fastened to the moving part to be measured; arranged such that it travels in alignment with the scale. The flexible nature of the tape scale makes the encoder ideal for rotary as well as linear applications. For ease of installation, the adhesive side of the tape is attached directly to a machined surface. For applications where the mounting surface is uneven, the tape scale can be attached to an optional twin track backing bar, supported by stand-offs. stainless steel cover strip is supplied to protect the encoded tape. The cover strip is attached to the encoded tape by way of adhesive backing. The tape scale is made up of a flexible magnetic rubber strip, sandwiched between a backing strip and a cover strip made from thin stainless steel. The encoded tape contains magnetic markers that are placed at intervals along the length of the tape. s the incremental sensor in the reader head passes over the tape, the magnetic field is converted to an electrical signal, which is sampled by a micro controller. The field between the markers varies sinusoidally, with which the micro controller determines the position of the sensor in relation to each marker. Reference Mark () One index marker (short lengths of tape containing just one magnetic pole pair) can be fitted in the second track of the optional backing bar. This is detected by the index sensor in the reader head and output as the signal. More then one reference mark can be supplied on request. = Element Sensor Side Stainless steel cover strip Encoded Magnetic Tape Stainless Steel strip with adhesive backing.mm (.7 ) bsolute Position (mm) = Element No. x.7 + Position on current Element Lengths to m mm (.9 ) Scale insert 9

6 Encoder Outputs - Incremental Encoder Outputs - Incremental TTL Differential Quadrature (ordering code TT) Newall TT Series Linear Encoders provide a differential quadrature output at TTL RS levels. The output signals are transmitted via a 9-core cable in accordance with the pin-out table below. TT - TTL - Differential Quadrature TTL Differential Quadrature (ordering code TT) The periodic Reference Mark () is synchronised with the and signals as shown in the diagram. The distance between two successive edges of the combined pulse trains and is one measuring step (resolution). Encoder Connections Single Point TTL RS Differential Quadrature (ordering code TS) and Single Point Vpp (ordering code VS) The SHG-TS and SHG-VS linear encoder scales have a series of up to eight selectable reference markers spaced every.mm, starting 7. from the end of the scale. The reference point selected is dependent on the rotational alignment of the scale relative to the reader head on installation. n installation LED, bio-colour green and red, is mounted on the reader head encoder face. vailable with TTL output (TS) or Vpp output when used with the SCC converter (VS). Distance-Coded TTL RS Differential Quadrature (ordering code TC) The SHG-TC Linear Encoders provide a unique output reference marker every mm of movement along the length of the scale. This allows the absolute position value to be captured by the controller having moved over a maximum distance of mm. this removes the requirement to traverse the full length of the scale to pick up the single point index and establish the alignment position. Vpp via SCC Signal Converter (included) (ordering code VP) Refer to section entitled Sine-Cosine Converter Newall Signal Codes TT Signal Type Description vailable on Incremental TTL TTL, RS Differential Quadrature output SHG, MHG, SP, MCG, MG Measuring Period ( resolution count) TC TS Incremental TTL-DC Incremental TTL-SP TTL, Distance Coded TTL Single Point SHG SHG, MHG, SP VP Incremental ~Vpp Volt Peak to Peak SHG, MHG, MCG VS Incremental ~Vpp-SP Volt Peak to Peak - Single Point SHG Connector D type 9 pin Core - TT Incremental Output Function Colour bsolute - RS bsolute - RS RS RS SHG SHG 7/.mm 7/.mm Twisted Pair 7/.mm, Do Not Connect Channel Channel Channel Orange Green Yellow lue F G bsolute - SSI-inary bsolute - Fanuc bsolute - SSI-Gray Synchronous Serial Interface - inary Code Fanuc Interface Protocol Synchronous Serial Interface - Gray Code SHG SHG SHG Twisted Pair 7/.mm Channel Red S bsolute - Gray & Parity Synchronous Serial Interface - Gray Code plus Even Parity Checksum SHG 7 7/.mm V lack 7/.mm Channel Violet 9 Twisted Pair Channel Grey GND Screen GND ---

7 Encoder Outputs - bsolute Encoder Outputs - bsolute RS + RS Differential Quadrature (ordering code ) RS is a serial communication typically used to interface with PC control systems 'COM' port. This Electronics Industry ssociation (EI) standard allows for data transmission from one transmitter to one receiver at data rates up to K bits/second and distances up to approximately m at the maximum data rate. US to serial converter (Newall part number 7-) is available to allow serial interface via a US port. RS + RS Differential Quadrature (ordering code ) SSI is a serial protocol that provides absolute positional feedback for encoder applications. The SSI is a synchronous standard, meaning that the clock signals for the data exchange are provided by the controller and are typically limited to.mhz. Transfer rates (baud) are also dependent on cable lengths. The following table is recommended. Signal Connection Table Connector D Type Pin - RS, do not connect RS TX - RS, do not connect RS TX bsolute Output - & -G SSI-Gray / SSI inary SSI CLK, do not connect -S Gray & Parity SSI CLK, do not connect -V SSI & ~Vpp RS + RS Differential Quadrature (Ordering code ) The RS standard is a multipoint communication network, which specifies up to drivers and receivers on a single -wire us. key feature is the ability to address individual devices. Newall's Linear Encoders are capable of being given and remembering a unique address tag which means multiple devices can be hung off the RS us. (Please specify address tag when ordering). Cable Length (m) < < < < aud Rate (KHz) inary is the position in decimal converted to its binary equivalent and then expanded with additional zero's to fill the required data packet. For example: 7 9 RS RX +VDC RS RX +VDC RS RS +VDC SSI CLK SSI DT SSI DT +VDC SSI CLK SSI DT SSI DT Details on page 7 Connection details via SCC bsolute Fanuc (ordering code F) (Decimal) = (inary) This protocol is proprietary to Fanuc and available on all of their control systems. The controller makes a request for positional data and the encoder has to respond correctly with data within a strictly controlled time state. If this is shown in a bit data packet it will equal: Gray is a binary code that only varies by one bit per transition. lank connections are not implemented and are to be left unconnected SSI Output Format The SSI (Synchronous Serial Interface) is a patented absolute interface by Max Stegmann GmbH. Newall's absolute encoders offer this interface implementing the bit Gray code or inary positional encoding. n even parity checksum is available on the S & V version. The Most Significant it (MS) is transmitted first (D). The following absolute encoders are available with an SSI output: Example: etc. So the position in decimal is converted to pure binary and the converted to its Gray code equivalent. This has the advantage over binary in that the maximum reading error is a single step. Signal Connection Table for Fanuc Serial bsolute Connector PCE - EFS HOND 9,, -F Fanuc Fanuc RQ +VDC Fanuc RQ Fanuc Data Fanuc Data bsolute SSI inary, it (ordering code ) bsolute SSI Gray, it (ordering code G),, bsolute SSI Gray, it with Even Parity (ordering code S or V) (Parity is transmitted last and is Even Parity)

8 Product Incremental Linear Encoders Product Incremental Linear Encoders SHG-TT, SHG-VP, Specification SHG-TS, SHG-VS s SHG-PC, SHG-PV Type Inductive Inductive ccuracy Grade ±µm (±.in) ±µm (±.in) Resolutions (µm/m) µm TS = µm VS = µm via SCC.,, & µm Resolutions (in).in.in.in.in.in.in Reference Type Periodic Single Point Reference Location Every.7mm (.in) User select from to every.mm (where scale travel permits) Maximum Traverse Rate SHG-TT = m/s at µm resolution SHG-VP = m/s at µm resolution SHG-PC = m/s at µm resolution SHG-PV = m/s at µm resolution SHG-TS = m/s at µm resolution SHG-VS = m/s µm Signal Period with SCC Maximum cc. / Dec. g / 9m/s (head moving) g / 9m/s (head moving) Power Supply VDC ± % <m VDC ± % <m ±. ±. max ±..±. Shock (ms) Vibration (-Hz) g / 9m/s (IEC 9--) g / 9m/s (IEC --7) g / 9m/s (IEC 9--) g / 9m/s (IEC --7) Ingress Protection (IP) Level IP7, fully submersible (IEC 9) - Exceeds NEM IP7, fully submersible (IEC 9) - Exceeds NEM.±..±..7±. Operating Temperature Range Storage Temperature Range Magnetic Field Susceptibility Radiated Magnetic Field to C ( to F) - to 7 C (- to F) mt ( Gauss) Less then mt to C ( to F) - to 7 C (- to F) mt ( Gauss) Less then mt Overall Cross-Section. x.mm ( x in). x.mm ( x in) Scale Material Stainless Steel Stainless Steel Clearance for M Fxgs - off LED SP-TS & SHG-TS & VS only Off = no marker Green = within marker window Red = marker activated Co-efficient of Expansion Scale OD Maximum Scale Travel Maximum Single End Mount Measuring Length ppm/ C.mm (.in),mm (7in)* mm (in) ppm/ C.mm (.in),mm (7in)* mm (in) ±. Maximum Length between Supports mm (9in)** mm (9in)** M Fxgs - off ±. Scale Over-Travel Requirements mm (in) mm (in) CLIRTION END Standard Cable 9 core screened cable with PUR (polyurethane) cover with no armour 9 core screened cable with PUR (polyurethane) cover with no armour Fully interlocked stainless steel armour. min Plastic rivet Reader head effective travel limits (dependent on mounting method) min. Coloured end cap (Red) (TS & VS only) Cable Length Minimum end Radius with PUR.m (in) mm (in).m (in) mm (in) With rmour.mm (in) Maximum Cable Length m (in) m (in) Serial No 79±. Position of first reference location SHG-TS & VS only Tube diameter. Nylon pan hd screw (TT, VP, PC & PV only) Connector EMC Compliance SHG-TT, SHG-VP, SHG-VV, SHG-VM = D type 9 pin (IP, NEM ) SHG-PC, SHG-PV = Pin D Type (IP, NEM ) S EN - & S EN - D type 9 pin (IP, NEM ) S EN - & S EN - SHG-TT, SHG-VP, SHG-TS, SHG-VS = pin (IP7, NEM ), SHG-PC, SHG-PV = 9 Pin (IP7, NEM ) * Longer scale travels are available on request ** Only applies for travels over mm ( in)

9 Product Incremental Linear Encoders Product Incremental Linear Encoders Specification MHG-TT, MHG-VP s Type ccuracy Grade Resolutions (µm/m) Resolutions (in) Reference Type Reference Location Maximum Traverse Rate Maximum cc. / Dec. Power Supply Shock (ms) Vibration (-Hz) Ingress Protection (IP) Level Inductive ±µm TT = µm VP = µm via SCC TT =.in Periodic Every mm (.in) MHG-TT = m/s at µm resolution MHG-VP = m/s at µm resolution g / 9m/s (head moving) VDC ± % <m g / 9m/s (IEC 9--) g / 9m/s (IEC --7) IP7, fully submersible (IEC 9) - Exceeds NEM ±µm.,.,.,, & µm.in.in.in.in.in.in...±. 7.±..±. //.(.") max Operating Temperature Range Storage Temperature Range Magnetic Field Susceptibility to C ( to F) - to 7 C (- to F) mt ( Gauss).±..... Radiated Magnetic Field Overall Cross-Section Scale Material Less then mt x mm (. x in) Carbon Fibre Stainless steel //.(.") FIXINGS FOR M CP HED SCREWS (off) Co-efficient of Expansion Scale OD ppm/ C.7mm (.in).±. Maximum Scale Travel mm (9in) //.(.") M FIXINGS (off) Maximum Single End Mount Measuring Length mm (in) Scale Over-Travel Requirements 7mm (7in).±. //.(.").7. Standard Cable Cable Length 9 core screened cable with PUR (polyurethane) cover with no armour.m (in) Fully interlocked stainless steel armour CLIRTION END Minimum end Radius with PUR mm (in) With rmour.mm (in).. Maximum Cable Length m (in) Connector D type 9 pin (IP, NEM ) pin (IP7, NEM ), Round type.7 EMC Compliance S EN - & S EN - FIXING END M x THRED FOR MOUNTING KNURLED END PLUG (SERIL No.) 7

10 Product Incremental Linear Encoders Product Incremental Linear Encoders Specification MCG-TT s Type Inductive ccuracy Grade ±µm (±.in) Resolutions (µm/m) µm.,.,.,, & µm Resolutions (in).in.in.in.in.in.in.in Reference Type Periodic Reference Location Every mm (.in) Maximum Traverse Rate m/s at µm resolution Maximum cc. / Dec. g / 9m/s (head moving) Power Supply VDC ± % <m Shock (ms) g / 9m/s (IEC 9--) Vibration (-Hz) g / 9m/s (IEC --7) Ingress Protection (IP) Level IP7, fully submersible (IEC 9) - Exceeds NEM Operating Temperature Range to C ( to F) Storage Temperature Range - to 7 C (- to F) Magnetic Field Susceptibility mt ( Gauss) (.") MOUNTING TOLERNCE FIXING END M x THRED FOR MOUNTING Radiated Magnetic Field Overall Cross-Section Scale Material Less then mt.mm x.mm/od (.in x.in/od) Carbon Fibre Stainless steel Co-efficient of Expansion ppm/ C Scale OD.7mm (.in) KNURLED END PLUG (SERIL No). FIXINGS FOR M CP HED SCREWS... Maximum Scale Travel Maximum Single End Mount Measuring Length mm (9in) mm (in) Scale Over-Travel Requirements 7mm (7in).9 Standard Cable 9 core screened cable with PUR (polyurethane) cover with no armour. Cable Length.m (in) MOUNTING TOLERNCE //.(.") Minimum end Radius with PUR Maximum Cable Length Connector EMC Compliance mm (in) m (in) D type 9 pin (IP, NEM ) S EN - & S EN - pin (IP7, NEM ).. 9

11 Product Incremental Linear Encoders - MG-TS Magnetic Tape System Product Incremental Linear Encoders - MG-TS Magnetic Tape System Specification MCG-TT MG-TS s Type Magnetic Tape ccuracy Grade ±µm +µm (.in) Resolutions (µm/m) µm µm Resolutions (in).in.in Reference Type Single dditional available Reference Location User Select Maximum Traverse Rate m/s at µm resolution m/s at µm resolution Maximum cc. / Dec. g / 9m/s (head moving) Power Supply VDC ± % <m Shock (ms) g / 9m/s (IEC 9--) Vibration (-Hz) g / 9m/s (IEC --7) Ingress Protection (IP) Level IP7, fully submersible (IEC 9) - Exceeds NEM Operating Temperature Range to C ( to F) Storage Temperature Range - to 7 C (- to F) OFFSET ROLL ±.(.") <± Magnetic Field Susceptibility Radiated Magnetic Field mt ( Gauss) 9mT (9 Overall Cross-Section x mm ( x in) Scale Material Rubber and Stainless Steel RIDE HEIGHT.(.") MX. Co-efficient of Expansion Scale Section ppm/ C x.mm (. x.7in) PITCH <± YW <± Maximum Scale Travel Standard Cable Cable Length m (77in) 9 core screened cable with PUR (polyurethane) cover with fully interlocked stainless steel armour.m (in) Minimum end Radius with PUR With rmour.mm (in) Maximum Cable Length m (in) Connector D type 9 pin (IP, NEM ) EMC Compliance S EN - & S EN - ±. ±. M CLERNCE Fxgs. - off.±....±..9.±... INCREMENTL SENSOR REFERENCE SENSOR al acking ar

12 Product bsolute and Distance-Coded Linear Encoders Product bsolute and Distance-Coded Linear Encoders SHG-, SHG-, SHG-, SHG- Specification SHG-TC s F, SHG-G, SHG-S, SHG-V Type Inductive Inductive ccuracy Grade ±µm (.in) ±µm (.in) & µm (.in,.in) Resolutions (µm/m) µm µm.,, µm Resolutions (in).in.in.in,.in,.in Reference Type None Distance-Coded Reference Location Every mm via RS interface Except SHG-F & SHG-V = None Max mm movement (.in) Maximum Traverse Rate SHG- = m/s SHG- = m/s SHG- = m/s SHG-F = m/s SHG-G = m/s SHG-S = m/s SHG-V = m/s limited by SCC m/s at µm resolution Maximum cc. / Dec. g / 9m/s (head moving) g / 9m/s (head moving) Power Supply VDC ± % <m VDC ± % <m Shock (ms) g / 9m/s (IEC 9--) g / 9m/s (IEC 9--) Vibration (-Hz) g / 9m/s (IEC --7) g / 9m/s (IEC --7) ±. Max..±. Ingress Protection (IP) Level IP7, fully submersible (IEC 9) - Exceeds NEM IP7, fully submersible (IEC 9) - Exceeds NEM ±. ±. Operating Temperature Range to C ( to F) to C ( to F) Storage Temperature Range - to 7 C (- to F) - to 7 C (- to F) Magnetic Field Susceptibility mt ( Gauss) mt ( Gauss).±..±..7±. bsolute reader head alignment mark Radiated Magnetic Field Overall Cross-Section Scale Material mt ( Gauss). x.mm ( x in) Stainless Steel mt ( Gauss). x.mm ( x in) Stainless Steel Co-efficient of Expansion ppm/ C ppm/ C CLERNCE FOR M Fxgs. - off LED Status Indicator Scale OD Maximum Scale Travel.mm (.in) mm (in).mm (.in) mm (in) Maximum Single End Mount Measuring Length mm (in) mm (in) ±. M Fxgs. - off ±. Maximum Length between Supports* Scale Over-Travel Requirements Standard Cable mm (9in) mm (in) 9 core screened cable with PUR (polyurethane) cover with no armour mm (9in) mm (in) 9 core screened cable with PUR (polyurethane) cover with no armour Fully interlocked stainless steel armour CLIRTION END Min. COLOURED END CP (LUE) REDERHED EFFECTIVE TRVEL LIMITS (DEPENDING UPON MOUNTING METHOD).±. PLSTIC SCREW Cable Length Minimum end Radius with PUR.m (in) mm (in).m (in) mm (in) With rmour.mm (in) Maximum Cable Length m (7in) m (7in) TUE DIMETER. SERIL No. & ZERO POINT & SOLUTE SCLE LIGNMENT MRK Connector EMC Compliance D Type Pin (IP, NEM ) S EN - & S EN - D Type Pin (IP, NEM ) S EN - & S EN - 9 Pin (IP7, NEM ) *Only applies for travels over mm ( in)

13 Product Linear Encoder with Flexible Mounting System Suitable for press brake applications Product Linear Encoder with Flexible Mounting System Suitable for press brake applications Reference () Scale Insertion depth..mm.mm.mm.mm.mm.mm.mm.mm 7 optional.mm.mm.mm.mm.mm Ø. /. (.97")/(.99").(.77") PUR CLE Ø.(.") - NO OUR MINIUMUM INTERNL END RDIUS ("). (.") End of scale Reference position =.mm + (Rn-) x.mm (from end of scale).mm M x SKT Cap screw M Cap screw washer M Flat washer.mm SCLE OVERLL LENGTH = MESURING LENGTH (TRVEL) +mm(7.")min. (.7").(.") 7 OURED CLE Ø.(.") MINIML INTERNL END RDIUS (") Ø. THRO' & C/ORED OTH SIDES TO CCEPT M CP HED SCREW - Places. (.") C M x DEEP - Places Specification Type ccuracy Grade Inductive ±µm (.in).mm SP-TS, SP-TT C Resolutions (µm/m) Resolutions (in),, µm.in,.in,.in Maximum Traverse Rate m/s at µm resolution.(.") (.9"). (.9") Ø. (. ) Ø. (.7 ). (.77").(.9"). (.") SFETY CLERNCE. (.") Maximum cc. / Dec. Power Supply Reference Mark Shock (ms) g / m/s VDC ± % <m SP-TS = User selectable from - (.mm apart) SP-TT = Periodic (.7mm) g / 9m/s (IEC 9--) MOUNTING FCES SHOWN -, - & C-C. (.9 ).7(.").(.").(.7").(.") Vibration (-Hz) Ingress Protection (IP) Level g / 9m/s (IEC --7) IP7, fully submersible (IEC 9) - Exceeds NEM Moving Force <N EMC Compliance S EN - & S EN - Operating Temperature Range to C ( to F) Storage Temperature Range - to 7 C (- to F) Overall Length Travel + 77.mm (.9in) Mounting lignment Tolerance ±mm at opposite end to flexible mounting system

14 SCC High Performance Converter for servo applications SCC High Performance Converter Dimensions SCC Connections (Signal Out Connector pin male D type) Incremental sinusoidal signals - Vpp (Vss) Input Power Connection V Pin Number 7 9 Shell VS, VP Function V + + Ground V Function SSI CLK V SSI CLK + SSI DT+ SSI DT+ + + Ground The sinusoidal incremental signals are produced by advanced processing of both the and signal channels. These channels are phase shifted by 9 and have a signal level of Vpp differential when terminated using the recommended circuitry with a common mode voltage of.v. The signal levels are maintained at all speed levels providing no loss of signal integrity with increasing scanning frequency. If the control cannot provide the required power, an external supply can be connected. V. Connections marked as reserved DO NOT CONNECT Note: The SCC is designed for DIN rail mount. (European DIN rail standards: EN & EN) Specification If the control can supply the required power, insert the link provided as shown below. Power Supply Operating Temperature VDC ±% <m o to o C Storage Temperature - o to 7 o C ifferen = Ingress Protection Level IP = EMC Compliance Sinusoidal Voltage Output Signal S EN - S EN - ~ Vpp differential Sinusoidal Signals & * Signal Levels. to.vpp*, typically Vpp Recommended Input Circuitry at Terminating Electronics mplitude Ratio ( to ) Phase ngle.9 to. 9 o C ± o elec Ref. Mark Zero Crossover Point ±9 o C ± o elec Dimensions mm x 7mm x mm** Weight.lbs (.kg)** Part Number (for encoder): SHG-VP SHG-VS -7 SHG-V MHG-VP MCG-VP -7 * With recommended input circuitry at terminating electronics ** Dimensions and weight do not include optional link or DIN rail mount 7

15 Connectors & Cables Standard Connectors (IP, NEM ) 9 Pin D Connector al Connector (IP7, NEM ) Pin Connector Extension Cables There are a selection of extension cables available for the range of encoders. Therefore a cable selection guide has been devised to ensure you can purchase the product you require. Select one option per section as required. The options in turn make up the part number. Colour Orange Green Yellow lue Red lack Violet Grey Screen Pin D Connector Pin 7 9 SHELL Function, Do Not Connect Channel Channel Channel Channel V Channel Channel GND Colour Orange Yellow Green Red lue Violet lack lack Grey Screen Pin al Connector (IP7, NEM ) 9 Pin Connector C D E F G H J K L M SHELL Function, Do Not Connect Channel Channel Channel Channel Channel V V Channel GND Section Extension Cable Digital Section Connector reader head end Section Cable Length Section Termination output end ELD 9D D 9 7 D D FL F Description Prefix applicable for all digital extension cables Description 9 pin D (IP, NEM ) pin D (IP, NEM ) pin round (IP7, NEM ) 9 pin round Description.m cable m cable 7m cable m cable Description 9 pin D (IP, NEM ) pin D (IP, NEM ) Flying leads (tails) Fanuc (Honda) M mp Section Description rmour rmoured Colour Light Green Orange Pink & Grey Red Yellow Pink lack Light Green & rown rown & Violet lue Dark Green Screen Pin 7 9 SHELL Function Fanuc RQ / SSI CLK, Do Not Connect RS TX RS RX +VDC Fanuc RQ/SSI CLK Fanuc Data / SSI Data / RS Fanuc Data / SSI Data / RS GND Colour Pink & lack lack lack Grey Violet Orange Pink Light Green & rown rown & Red Yellow Dark Green Light Green Screen Pin C D E F G I K L M N O P S T U SHELL Function RS TX + VDC + VDC + VDC, Do Not Connect RS RX Fanuc RQ / SSI CLK Fanuc Data / SSI Data / RS Fanuc Data / SSI Data / RS Fanuc RQ / SSI CLK GND Non-armoured Extension cable for SCC to CNC/PLC/Motion Control/Drive Encoder Interface Select one option per section as required. The options in turn make up the part number. Section Extension Cable Digital Section Connector SCC output Section Cable length Section Termination output end* Section rmour ELD DS D FL * Other termination outputs available on request Description Prefix applicable for all digital extension cables Description pin D (IP, NEM ) Description.m cable m cable.m cable.m cable Description pin D (IP, NEM ), Siemens D Drive or D CNC Flying leads (tails) Description rmoured Non-armoured 9

16 General Information The Spherosyn TM Technology dvantage Environmental Protection ll variants of Newall encoders carry an Ingress Protection (IP) rating of 7 (NEM ). The encoders are fully submersible and will continue to provide accurate and dependable readings under the harshest conditions. Unlike most glass based systems, no air purging is required. Dirt, swarf, cast iron dust, graphite dust and other common contaminates will not effect the performance of the system. Shock and Vibration In comparison to other linear displacement technologies, Newall s Linear Encoders are tolerant to high degrees of vibration and shock. Shock and Impact (ms IEC 9--): Spherosyn TM technology = m/s (g) Vibration ( - Hz IEC --7): Spherosyn TM technology = m/s (g) Reliability Newall encoders require no regular cleaning or maintenance. Unlike optical/glass-based systems, Newall encoders have no general wear characteristics. There are no LEDs to burn out or glass to get scratched or broken. There are no roller bearings, leaf springs or other moving parts to wear out or fail. Ease of Installation Installation can be accomplished in a fraction of the time as compared to other linear systems. Even with scale lengths up to metres, machined surfaces or backing bars are not needed. For more compact installations, single end mounting options exist, where the scale need only be supported on one end. These are designed for direct integration into OEM design or optional Newall mounting brackets can be selected. The Spherosyn Technology dvantage The Spherosyn Technology dvantage ccuracy, Repeatability and Resolution The laser measurement system used to calibrate all of Newall scales have been calibrated by accredited laboratories providing traceability to UK national standards. The procedures comply with the requirements of ritish Standard Specification S7/International Standard ISO-. The National Physical Laboratory (NPL) calibrates the master standard, certificate number /9. ll Newall Calibration rigs are traceable back to this NPL standard. The calibration of the Newall scales and reader heads is conducted in a temperature controlled (ºC) environment. Thermal Expansion The thermal behaviour of the linear encoder is an essential criterion for the working accuracy of a machine tool. nd thus it is common knowledge that the thermal behaviour of the encoder should match that of the workpiece. Consequently, a C temperature rise can result in a thermal expansion error for glass in the order of µm over m of travel. In practice, it is rare that thermal stability will be achieved within the machine, workpiece or encoder during normal operation due to rates of thermal behaviour and environmental conditions. s a result, errors due to thermal effects are impossible to quantify and may be greater or lower than those theoretically calculated. Such errors are minimised by ensuring that the encoder is as matched as possible to both the machine and workpiece. Product Group Glass PPM Steel/Iron (ppm) Differential luminium - Spherosyn TM * * Spherosyn TM results measured by the Department of Physics University of Hull using strain gauge dilometery with temperature compensation Newall reserves to change specifications to the products without notification and the company accept no liability for claims from any changes. 7 - ll proprietary rights, including design rights, copyright and trademarks, in the content materials, information, data, images, graphics, typographical arrangements and photographs appearing in this brochure are and shall remain the property of Newall Measurement Systems Limited. No portion of this brochure or any of its content may be reproduced, duplicated, copied, distributed or otherwise utilised for any purpose without our express written consent....at the cutting edge

17 Linear Encoders Newall Measurement Systems Ltd. Technology Gateway, Cornwall Road, South Wigston, Leicester LE XH, UK Tel. + () 7 Fax. + () 7 . sales@newall.co.uk Web. Newall Electronics Inc., 77 Dividend Drive, Columbus, Ohio, OH, US Tel Fax sales@newall.com Web.