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The following company names and brands are registered trademarks of Physik Instrumente (PI) GmbH & Co. 

KG: 
PI®, NanoCube®, PICMA®, PIFOC, PILine®, NEXLINE®, PiezoWalk®, PicoCube®, PiezoMove®, PIMikroMove, 

NEXACT®, Picoactuator®, PInano®, NEXSHIFT®, PITOUCH®, PIMag®, PIHera, Q-Motion® 
 
© 2020 Physik Instrumente (PI) GmbH & Co. KG, Karlsruhe, Germany. The text, photographs, and drawings in 

this manual are protected by copyright. With regard thereto, Physik Instrumente (PI) GmbH & Co. KG reserves 

all rights. The use of any text, images, and drawings is permitted only in part and only when indicating the 

source. 
Original instructions 

First print: 11/4/2020 

Document number: MP77E, ASt, Version 1.1.0 
Subject to change. This manual is superseded by any new release. The latest release is available for download 

from our website (p. 2). 

 

Summary of Contents for M-238

Page 1: ...77E M 238 High Load Linear Actuator User Manual Version 1 1 0 Date 11 4 2020 This document describes the following high load linear actuators with 50 mm travel range M 238 5PG with DC gear motor with PWM power amplifier ActiveDrive with rotary encoder M 238 5PL with DC gear motor with PWM power amplifier ActiveDrive with linear encoder ...

Page 2: ...KG Karlsruhe Germany The text photographs and drawings in this manual are protected by copyright With regard thereto Physik Instrumente PI GmbH Co KG reserves all rights The use of any text images and drawings is permitted only in part and only when indicating the source Original instructions First print 11 4 2020 Document number MP77E ASt Version 1 1 0 Subject to change This manual is superseded ...

Page 3: ...2 1 Elements of the M 238 5 3 2 2 Type plate 6 3 3 Scope of Delivery 6 3 4 Suitable Electronics 6 3 5 Technical Features 7 3 5 1 Integrated PWM amplifier 7 3 5 2 Encoder 7 3 5 3 Limit Switches 7 3 5 4 Reference Switch 7 4 Unpacking 9 5 Installing 11 5 1 General Notes on Installing 11 5 2 Providing a Suitable Mechanical Mounting and Installation Environment 12 5 3 Installing the M 238 into a Mechan...

Page 4: ...ns 23 10 1 1 Data Table 23 10 1 2 Maximum Ratings 24 10 1 3 Ambient Conditions and Classifications 24 10 1 4 Limit Switch Specifications 25 10 1 5 Reference Switch Specifications 25 10 2 Dimensions 25 10 3 Pin Assignment 26 10 3 1 Drive connector 26 10 3 2 Voltage connector 27 10 4 Measured Curves 27 11 Old Equipment Disposal 29 12 EU Declaration of Conformity 31 ...

Page 5: ...s are used in this user manual CAUTION Dangerous situation Failure to comply could lead to minor injury Measures for avoiding the risk NOTICE Dangerous situation If not avoided the dangerous situation will result in damage to equipment Measures for avoiding the risk INFORMATION Information for easier handling tricks tips etc Symbol Label Meaning 1 2 Action consisting of several steps with strict s...

Page 6: ...the electronics 1 4 Downloading Manuals INFORMATION If a manual is missing or problems occur with downloading Contact our customer service department p 21 Downloading manuals 1 Open the website www pi ws 2 Search the website for the product number e g F 238 3 Click the corresponding product to open the product detail page 4 Click the Downloads tab The manuals are shown under Documentation 5 Click ...

Page 7: ...andards Improper use may result in personal injury and or damage to the M 238 Use the M 238 only for its intended purpose and only when it is in perfect technical condition Read the user manual Eliminate any malfunctions that may affect safety immediately The operator is responsible for the correct installation and operation of the M 238 2 2 1 Organizational Measures User manual Always keep this u...

Page 8: ...fety 4 Version 1 1 0 MP77E M 238 High Load Linear Actuator Personnel qualification The M 238 may only be installed started operated maintained and cleaned by authorized and appropriately qualified personnel ...

Page 9: ...otor ActiveDrive M 238 5PL High load linear actuator 400 N 50 mm DC gear motor ActiveDrive direct position measuring 3 2 Product View 3 2 1 Elements of the M 238 Elements of the M 238 Labeling Type Function Controller D sub 15 m p 26 Drive connector Connects the M 238 to the electronics 24 V DC Mini XLR 3 pole m p 27 Connector for the power supply 3 Product Description ...

Page 10: ... Scope of Delivery Order number Components 000023194 24 V 120 W wide input range power supply with barrel connector socket 3763 Power cord K050B0002 Power adapter barrel connector 5 5 mm x 2 1 mm to mini XLR3 f MP122EK Short instructions for linear actuators 3 4 Suitable Electronics The M 238 must be connected to suitable electronics The following electronics are suitable Product number Descriptio...

Page 11: ...on directly and therefore eliminate drive errors such as nonlinearity backlash or elastic deformation The resolution of the encoders can be found in the data table p 23 3 5 3 Limit Switches The limit switches are sensors at each end of the travel range that enable the electronics to abort motion in order to prevent the pusher from colliding with the mechanical hard stop The M 238 is equipped with ...

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Page 13: ...ith care 2 Compare the contents with the items listed in the contract and the packing list 3 Inspect the contents for signs of damage If there is any sign of damage or missing parts contact PI immediately 4 Keep all packaging materials in case the product needs to be returned 4 Unpacking ...

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Page 15: ...cannot be bent or crushed too strongly NOTICE Increased friction Lateral forces acting on the pusher of the linear actuator increase the friction of the internal drive components Increased friction impairs the motion of the pusher and increases wear on the drive components Avoid lateral forces on the tip and on the pusher of the M 238 NOTICE M 238 heating up during operation The heat produced whil...

Page 16: ...llation environment Take into account the following specifications as well when planning the application and installing the actuator Tip dimensions see Dimensions p 25 Travel range see data table p 23 Space requirements for bend free and proper guiding of the connecting cable and additional motor cables Length of the connecting cable and the motor cable If the limit switches of the actuator cannot...

Page 17: ...ng with a clamp connection The following instructions refer to this case Clamp connection schematic 1 Mechanical mounting 2 Sleeve 3 Mounting nut 4 Mounting shaft with thread 5 Pusher with tip Requirements You have read and understood the general notes on installation p 11 You have provided your application with a suitable mounting for the mounting shaft of the actuator p 12 Tools and Accessories ...

Page 18: ...You have read and understood the general notes on installation p 11 You have read and understood the user manual for the electronics You have installed the electronics properly The electronics are switched off Tools and Accessories Suitable electronics p 6 Cable set suitable for the electronics used Wide input range power supply with power adapter and power cord included in the scope of delivery p...

Page 19: ...vated the motion of the pusher is stopped by the hard stop and the M 238 could be damaged Do not deactivate the limit switches in the software Test the function of the limit switches at low velocities only NOTICE Damage or considerable wear due to high acceleration High acceleration could cause considerable wear and damage the mechanics Stop motion immediately if a controller malfunction occurs Ma...

Page 20: ...nstalled refer to the user manual for the electronics Starting and Operating the Actuator 1 Plug the power cord of the power adapter into the power socket 2 Start the electronics refer to the user manual for the electronics 3 Configure the electronics for the M 238 during startup If you are using a digital controller from PI In the PC software select the entry in the positioner database that match...

Page 21: ...s moved continuously over a short travel range 20 of the entire travel range in an industrial situation do a run across the entire travel range approximately every 2000 motion cycles Relubricating Under laboratory conditions the positioner needs relubrication in exceptional cases only For continuous industrial use the lubrication intervals must be determined individually If you have any questions ...

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Page 23: ...e Lateral forces are acting on the pusher Lateral forces increase the friction on the internal drive components Avoid lateral forces on the tip and on the pusher of the M 238 The mechanics do not move but generate operating noise Values for the velocity acceleration and or load are too high Reduce the velocity Reduce the acceleration Reduce the load on the mechanics The mechanics did not stop in t...

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Page 25: ...cerning your system provide the following information Product and serial numbers of all products in the system Firmware version of the controller if applicable Version of the driver or the software if applicable PC operating system if applicable If possible Take photographs or make videos of your system that can be sent to our customer service department if requested 9 Customer Service Department ...

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Page 27: ...m incremental motion 0 5 0 3 µm Typ Backlash 3 1 µm Typ Unidirectional repeatability 1 0 3 µm Typ Velocity 30 30 mm s Max Reference switch repeatability 1 1 µm Typ Mechanical properties M 238 5PG M 238 5PL Unit Toleran ce Drive screw pitch 2 2 mm Gear ratio 3 71 1 3 71 1 Push pull force 400 400 N Max Permissible lateral force 100 100 N Max Drive properties M 238 5PG M 238 5PL Unit Toleran ce Motor...

Page 28: ...llowing operating data Model Maximum operating voltage Operating frequency Maximum power consumption M 238 5PG 24 V DC 80 W M 238 5PL 24 V DC 80 W 10 1 3 Ambient Conditions and Classifications Pay attention to the following ambient conditions and classifications for the M 238 Area of application For indoor use only Maximum altitude 2000 m Relative humidity Max 80 for temperatures up to 31 C Decrea...

Page 29: ...logic The signal level changes when passing the limit switch The signal logic is active high That means Normal motor operation low Limit switch reached high 10 1 5 Reference Switch Specifications Type Magnetic Hall effect sensor Supply voltage 5 V ground Signal output 0V 5V TTL level Signal logic Direction sensing via different signal levels on the left and right of the reference switch 10 2 Dimen...

Page 30: ... V 2 n c Not connected 3 MAGN PWM signal input 4 5 V 5 V for encoder and digital signals 5 PLIM Positive limit switch TTL 6 GND Ground digital 7 Encoder A Encoder signal A inverted TTL 8 Encoder B Encoder signal B inverted TTL 9 n c Not connected 10 PGND Ground 11 SIGN PWM signal input 12 NLIM Negative limit switch TTL 13 REF Reference switch TTL 14 Encoder A Encoder signal A TTL 15 Encoder B Enco...

Page 31: ...tor MP77E Version 1 1 0 27 10 3 2 Voltage connector Mini XLR 3 pole m Pin Signal Function 1 GND Ground 2 Vcc 24 V DC supply voltage 3 n c Not connected 10 4 Measured Curves The repeatability of the M 238 5PL with linear encoder is less than 0 3 µm ...

Page 32: ...10 Technical Data 28 Version 1 1 0 MP77E M 238 High Load Linear Actuator The M 238 requires less than 1 5 seconds for a 30 mm step The velocity constancy of an M 238 5PL at 30 mm s ...

Page 33: ...according to international national and local rules and regulations In order to fulfill the responsibility as the product manufacturer PI miCos GmbH undertakes environmentally correct disposal of all old PI miCos equipment made available on the market after 13 August 2005 without charge Any old PI miCos equipment can be sent free of charge to the following address PI miCos GmbH Freiburger Strasse ...

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Page 35: ...ssued for the M 238 in accordance with the following European directives Machinery Directive EMC Directive RoHS Directive The standards applied for certifying conformity are listed below Safety of Machinery EN ISO 12100 Electrical Safety EN 61010 1 EMC EN 61326 1 RoHS EN 50581 or EN IEC 63000 12 EU Declaration of Conformity ...

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