Linear Gage LGK series
Contents
1. Output condition Spindle movement speed S Response speed Output signal s minimum edge interval Tr Output delay Maximum 2 5us 2 Error output shale ane T e MIN Output condition In the conditions below the gage turns to the error status and outputs the special pattern shown in the above Response speed lt Spindle movement speed When suffering electric noise or physical shock Output minimum pulse width Te a Response speed See specifications 2 Minimum edge interval pulse width See specifications 3 Output delay The time required for the output to catch up with the spindle position 6 Cable extendible length The cable can be extended up to 20m using the extension cable optional IMPORTANT Since error output can not be used as the counting data the error condition must be detected in the input circuit It is recommended to use a counter IC which can count 5Mcps 1 25MHz in square wave signal or higher f the gage cable is close to the power line for other instruments the gage may malfunction Connect the gage cable as apart from the power line as possible f the gage is connected with other counter than Mitutoyo made allow at least 0 2 second after the gage is turned on then reset the counter 5 Maintenance 1 Replacing the contact point Fit the supplied key spanner in the keyway of the spindle then2. detach or attach the contact point by pinching it with etc IMPORTANT If torque is applied to the sensor inside through the spindle damage 3 KeyWay or malfunction in the sensor may result Be sure to fix the spindle using the key spanner Key spanner for replacing contact points 2 Replacing the rubber boot Standard accessory 538610 Preventive replacement before being damaged is recommendable The rubber boot is available as an optional accessory 1 Remove the old rubber boot then eliminate the dust and dirt in the grooves part A or the stem and spindle pba fee ee tH 7 EB Spindle Rubber boot contact point 2 Insert a rubber boot between the stem and contact point directing the greater inside diameter end to the stem 3 Apply a small amount of silicone adhesive to the grooves part A and seal both ends of the rubber boot IMPORTANT If the adhesive is applied to the spindle slider the spindle will not slide properly Great care must be exercised Stem A I El E KeyWay 6 Specifications Color of ring of discriminating Green Blue Gold a model 0 8 L 50 um Measuring force Se E Contact point downward Contact point horizontal Contact point upward 1500mm s 400mm s Output method ee ene eee Compatible with RS422A 4um 0 4um Minimum edge interval Tr 0 4us Tr 0 2us Tr 0 2us Minimum pulse width Te 0
3. 4us Te 0 2us Te 0 2us 3 carbide ball Thread M2 5 x 0 45 m 1 Differential square wave pitch Protectionlevel iP _ i Standard accessory Key spanner for contact point replacement No 538610 CE marking EMC Directive EN61326 1 Immunity test requirements Clause 6 2 Table2 Emission limit Class B X1 L Measured length in mm 7 Optional Accessories must be purchased separately Extension cable 5m No 902434 Extension cable 10m No 902433 i 2 5 x 0 45 2m directly wired from the gage O z Extension cable 20m No 902432 Example use of thrust stem NOTE To use the thrust stem the above three kinds of Optional accessories marked are required Thrust stem He No O2ADB681 J 9 9 5 6 015 14 5_5 A Mounting nut No 02ADB682 Fixture width L 6 to 10 5mm 30 4 If the thrust stem and tightening nut are used the gage mount fixture needs only a 9 5 hole to be drilled and also the gage can be mounted firmly and easily JO IMPORTANT Before mounting the thrust stem be sure to secure the stem using the dedicated spanner No 02ADB683 Excessive force applied between the gage body and stem may cause damage to the gage NOTE The dedicated spanner No 02ADB683 and M9 5 x 0 5 screw are used only for mounting the thrust stem Do not use them for other purposes Thrust stem and Mounting nut dimension 13 25 Mitutoyo Corporation 20 1 Sak
4. Linear Gage LGK series Foreword To obtain the highest performance and the longest service life from your Linear Gage carefully read this manual thoroughly prior to setup and operation After reading this manual keep it near the Linear Gage for quick reference The specifications of this gage and the description in this manual are subject to change without prior notification Safety Precautions To ensure operator safety use the instrument in conformance with the directions and specifications given in this User s Manual Precautions for Use Carefully avoid the following attempts to protect the instrument from failure and malfunction IMPORTANT Do not apply sudden shocks including a drop or excessive force to the linear gage Do not disassemble or modify the gage Do not use and store the gage at sites where it is exposed to direct sunlight or at extremely hot or cold sites To use the gage highly accurately avoid sites where the temperature will change abruptly Absolutely do not apply an electric engraver to the gage The high voltage may damage electronic parts Also do not use the gage at sites where it is subject to large electronic noises Do not exert load on the spindle in the perpendicular direction and do not twist the spindle Do not clamp the stem too tightly since the spindle will not move smoothly Do not apply excessive tension to the cable or do not bend it forcibly To perform stable measur
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6. are used for the rubber boot and other sealing parts are not universal against diversified coolants and chemicals If those parts deteriorate unusually consult the nearest Mitutoyo Service Center Each part of the gage is sealed up and therefore must not be disassembled If any part is disassembled the rated performance will not be obtained Do not absolutely disassemble the gage 4 Specifications of Gage Output Signals 1 Output connector RM12BPE 6PH Hirose 2 Pin assignment 1 Pin No Signal namel X Power supply to the gage head 2 6 Power voltage 5V 4 8V to 5 2V Ripple voltage 200mVp p or less 3 5 A Current consumption 120mA max 1 6 3 Output signal level A GA OB PB TTL line driver AM26LS31 or equivalent 4 Input connector and recommended input circuit Suitable connector RM12BRD 6S Hirose LGK output circuit i Recommended input circuit QA B gt O Oo H i Lay 33pF ATAB gt A saM iA S 5v wey Pe ey gt A F 26LS32 or equivalent Y Y a A a5 i Pmi GND f T GND 5 Output signal chart This Linear gage outputs two patterns of waveform signal shown below When designing an input circuit error detection function must be prepared 1 Real time pulse output When the spindle is pushed in A precedes B phase A Phase B l l Tr MIN 1p m O 5u m O 1p m Resolution
7. ement allow at least 10 minutes after turning on the power Do not set up the origin point at either end of the stroke If the gage is used in combination with other instruments the maximum performance could not be obtained depending on environmental and operating conditions Take those conditions into consideration prior to use The functions and performance will not be guaranteed if the gage is used in other conditions than those specified Take sufficient damage preventive processing safety measures should this gage have been at fault Caution Please be careful enough when handling the knife edge or blade type contact point since there is a possibility of injury at exchange and use Electromagnetic Compatibility EMC This product complies with the EMC Directive Note that in environments where electromagnetic interference exceeds EMC requirements defined in this directive appropriate countermeasures are required to assure the product performance 1 Name and Dimension of Each Part unit mm X g 12 Cable length 2m stem Ring of discriminating Rn Rubber boot ue Spindle Thrust stem o Contact point mounting screw A Signal cable R M9 5x0 5 S Osie g output connector RM12BPE 6PH Hirose 10 6 or nel Mitutoyo No 99MBC081B SeriesNo 542 2 Mounting the Gage 1 To mount the gage on another instrument or a fixture clamp the 8 stem 2 I
8. t is recommended to use a slotted holder or a split bushing for the mount structure Recommended tightening torque in Example 1 4 0 to 5 0kgf cm M4 x 0 7 thru unit mm Example 1 k 4 5 drill 7 5 countersink A Across section 4 4 deep 0 020 8 0005 Example 2 Split bushing o 10 0 015 10 A 75 a M 0 020 0 020 10 0005 T M4x 0 7 thru 8 0005 J I A A A cross section Notch position 90 with respect to tap IMPORTANT Absolutely avoid pressing the stem directly with set screws The built in bearing may be damaged Mount the gage so that the spindle is directed perpendicular to the measured Eieieo res surface If the gage is mounted at an angle ch to the measured surface an error may be e Ss generated in measurement results 3 Precautions in Protecting the Gage from Dust and Water IMPORTANT The output connector plug counter side is not protective structured Install the gage at a place where it is not splashed directly with water or oil If the cable covering is broken liquid will penetrate into the gage inside due to capillary phenomenon This will cause damage to the gage Immediately repair the cable Be greatly careful not to damage the rubber boot due to chips etc If the rubber boot is damaged dust proof and water proof function will be deteriorated Immediately replace or repair the rubber boot The materials including rubber which
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