New products now available from Heidenhain

Micromech is pleased to pass on details of the updates for new products now available from Heidenhain, the global, major encoder company

ECI / EQI Absolute Inductive Rotary Encoders

These absolute rotary encoders use a printed track inductive coupling technique between rotor and stator. They are extremely rugged in construction, and so are suitable for industrial applications and can be run at speeds of up to 15,000 rpm.

They have no integral bearing so are ideal for mounting on an extension shaft of a machine or motor drive system which has an existing bearing supporting it.

They are offered in three different body sizes:

37mm dia x 23mm long with 6.0mm blind hollow bore

65mm dia x 29mm long with taper hollow bore

92mm dia x 18.5mm long with 50mm hollow through bore

The signal interface is EnDat 2.1 with incremental tracks provided in 16 or 32 signal periods per rev. EnDat protocol is compatible with AQ Biss and Heidenhain can offer support with system integration designs using AQ Biss circuit elements.

With position values per rev totalling 524,288 (19 Bits) the EQI 1331 has a counting range of 2,147,483,600 before rollover.

These encoders are not normally only offered to be supplied in single units due to the level of support required. They can be purchased for service supply in the case of breakdown but otherwise only for volume applications. For requirements in excess of 100pcs per order, with a committed call-off, the volume pricing for EQI 1130 can typically be just £120.00 per unit.

ERO 1200 and ERO 1400 Optical Incremental Encoders

These Incremental Rotary encoders are designed for volume OEM applications, which require minimal installation space is available They offer line counts up to 1500per rev (6000 counts post quadrature) and can be driven at speeds up to 30,000 rpm.

ERO 1200 is an open assembly for installations within an overall housing such as motor housing. Dimensions are: 52mm dia x 30mm long with 10 or 12mm rotor bore.

ERO 1400 is enclosed within a plastic cover cap and supplied with an integral mounting/spacing aid. Dimensions are: 39mm dia x 20mm long with cover clip in place. Shaft bores are 4, 6 or 8mm.

Inductive Rotary Encoders for Resolver Systems, and with a Higher Resolution

The inductive rotary encoders of the HEIDENHAIN ExI 1100 series are now available in versions whose mating dimensions is the same as those of common types of resolvers. Depending on the respective applications and accuracy requirements, inductive or optical absolute encoders are now possible as high-resolution alternatives to resolvers. These encoders are easy to mount and inexpensive, and are dedicated to applications that require a high degree of reliability and durability.

Furthermore, the HEIDENHAIN ExI 1100 rotary encoders with EnDat 2.1 interface feature an improved inductive scanning method, with which the single turn resolution was increased to 18 bits (262,144 position values per revolution). This results in a higher control quality of the drive.

Servo drives with inductive rotary encoders enjoy advantages over those using resolvers in terms of positioning accuracy, speed stability and control dynamics. This is made possible by the greater control bandwidth and a significantly higher number of signal periods for the formation of the single-turn position value. The position value is produced by electronics already integrated in the encoder, and is transferred as purely digital information to the higher-level electronics over the fast bi-directional EnDat interface. As an option, the information can be transferred as an analogue signal. An integrated read and write EEPROM makes user parameters available in the subsequent electronics at all times, enabling the encoder and its environment to self-configure over the synchronous serial interface.

The encoder’s real multi-turn capability frees the system from the need to be “homed” after power interruptions or switch-on. Conventional battery-supported systems requiring regular maintenance are no longer needed. Alarm and diagnostic functions ensure high system availability rates.

Inductive Rotary Encoders for Resolver Systems and those with a Higher Resolution

The inductive rotary encoders of the HEIDENHAIN ExI 1100 series are now available in versions whose mating dimensions are the same as those of common types of resolvers. Depending on the respective applications and accuracy requirements, inductive or optical absolute encoders are now possible as high resolution alternatives to resolvers. These encoders are easy to mount and in-expensive and are dedicated to applications that require a high degree of reliability and durability. Furthermore, the HEIDENHAIN ExI 1100 rotary encoders with EnDat 2.1 interface feature an improved inductive scanning method, with which the single-turn resolution is increased to 18 bits (262,144 position values per revolution). This results in a higher control quality of the drive. Servo drives with inductive rotary encoders enjoy advantages over those using resolvers in terms of positioning accuracy, speed stability and control dynamics. This is made possible by the greater control bandwidth and a significantly higher number of signal periods for the formation of the single-turn position value. The position value is produced by electronics already integrated in the encoder, and is transferred as purely digital information to the higher-level electronics over the fast bi-directional EnDat interface. As an option, the information can be transferred as an analogue signal. An integrated read and write EEPROM makes user parameters available in the subsequent electronics at all times, enabling the encoder and its environment to self-configure over the synchronous serial interface. The encoder’s real multi-turn capability frees the system from the need to be ‘homed, after power interruptions or switch-on. Conventional battery-supported systems requiring regular maintenance are no longer needed. Alarm and diagnostic functions ensure high system availability rates.

Micromech is the UK distributor and systems integrator for HEIDENHAIN encoders, for more information contact Stirling on 01376 333333 or email to stirling@micromech.co.uk

‘Affordable Automation’

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Motion systems project file – April 2013

Micromech Systems provides a comprehensive motion service ranging from just simple modifications to motors and bespoke multi-axis control systems including full installation, commissioning and after sales service.

Project Detail: Beamline Upgrade

Year: 2004

Industry or Research faculty: Synchrotron light source

Application or solution
A technology upgrade was required for thirty-one motion control axes concerned with positioning various sample stages and beam slits. The system needed 16 small servomotors and 15 stepper motors.

Scope of overall contract
To propose a complete turnkey solution of controls and mechanical arrangements which could be rapidly installed and commissioned during the summer shutdown period. The proposed design was to build a two-rack system, devise motion software, test, install and finally commission.

Description of equipment and services supplied
Due to limited space in the beam-line hutch it was necessary the control be split into two parts. A large free standing cubicle to be mounted on the hutch roof and a small 16-axis slave servo control to be mounted on the wall of the hutch inside. Power supply conditioning was also required due to previous experience caused by high energy noise problems. To control the 31 axes Micromech engineers used four powerful Parker 6K8 Ethernet motion controllers. The servo drives employed were from Maxon and the stepper drives from Stogra.

Merits of solution provided
Micromech devised a special stepper driven actuator using a linear thrust stepper to actuate an existing Newport slit mechanism previously powered by a DC servo gear-motor. Encoder signals were converted from single ended to differential to improve noise immunity. The Ethernet front end enabled the scientists to command all 31 axes direct using their existing beam line control ‘front – end’ software platform. The system was built and tested at Micromech’s works and demonstrated to the client for acceptance, before delivery to site. Installation was simple due to the modular system and having pre-made cables.

Micromech Systems builds motion control systems to customers’ specifications, ranging from simple single-axis applications to complex multi-axis systems. We will design, build, test, and produce application software, install and commission providing a cost-effective trouble-free solution to your motion control issues. Whether the application is a machine upgrade or a new project, Micromech Systems has the answer.

May 2013 project: Insertion device prototype

The Stealth flange-face gearheads eliminate the middleman!

Now offered as a standard option, the flange-face mounting on the PX and RX Stealth gearheads offer a number of advantages:

Allows a customer to directly mount to the gearhead’s rotating shaft

Improves the torsional rigidity of the system which in turn allows for easier tuning of the servo motor and improved dynamic response

Overall envelope size of the assembly is reduced by this type of mounting configuration

The application opportunities for the Stealth range is enormous but of course it’s with stepper and servo motion, where high dynamic and precision control is required, which they excel.

For more information or a quotation contact Alan Spinks on 01376 333333 or email to alan@micromech.co.uk

stealth is the characteristic of ‘moving with extreme care and quietness’

Introducing the new, powerful Parker ORIGA HMR series of electromechanical linear actuators driven by screw, toothed belt or linear motor

The new electromechanical linear actuator series does not simply stand for very user-friendly flexibility with regard to their installation and mounting options it also implies a range of fully integrated options such as proximity switches for limit positions and reference, linear position encoders, holding brakes and impact protection as well as the retrofit covers for IP54 protection rating.

With screw, toothed belt and linear motor, the HMR series offers three drive concepts, which address all applications that require the speed-optimised movement of medium to large masses forces in a steady motion profile, and highly accurate positioning.

HMR-B Toothed belt

The new HMR electromechanical linear actuator with toothed belt is particularly suitable for highly dynamic movements and long travel.

 

 

 

HMR-SB Screw

The new HMR electromechanical linear actuator with ball screw is ideal, when high-precision positioning is required.

 

 

 

HMR-LM Linear motor

The HMR electromechanical linear actuators can be driven by screw (front) or toothed belt (rear)

 

 

 

HMR linear actuators can alternatively be operated either with or without cover. So they either comply with IP20 or IP54. The unique design of the toothed belt version HMR gives outstanding flexibility with regard to the mounting position of the motor. Furthermore since the motor can be placed on any of the actuator’s sides, the user can benefit from an unprecedented flexibility when configuring and setting up the drive with an individual package. Flexibility does not stop here; whether it is on the machine bed or self-supporting, the HMR can easily be mounted using either its bottom or lateral grooves, with supplied brackets if required.
The HMR modularity continues with the free choice of the position of switches for limit and reference: These can be placed both inside and outside of the easily removable covers. Reed contact or electronic limit switches give the linear actuator not only its operational safety but also extended lifetime since these avoid the usual hard impacts with associated with wear and tear in the actuator’s end positions. At particularly high speeds the limit switches can be combined with shock absorbers for additional impact protection.
In case the HMR operates with its covers fitted the user can benefit from another convenient feature: external grease nipples allow lubrication without the need to remove these covers. This saves time and reduces downtime. A holding brake provides the necessary security and keeps the actuator together accurately in its position with the work-piece it carries. This is particularly beneficial when work-pieces have to be passed over from the actuators carriage to another workstation. Brakes are also fully operational when the actuator is mounted in vertical position.
Both optical and electromagnetic displacement measuring systems are available to ensure the accurate stop of the actuator’s carriage at intermediate positions.
Most of the HMR’s options can be fitted underneath its covers. So contamination or mechanical damage of externally protruding components is no longer an issue.

The ORIGA HMR series has been designed for use in harsh and humid environments such as in production, or in the bottling and packaging of food and beverages.

Parker Hannifin is the world’s leading diversified manufacturer of motion and control technologies and systems, providing precision-engineered solutions for a wide variety of mobile, industrial and aerospace markets.

Micromech is the UK distributor and systems integrator for Parker Origa electromechanical products. For more information contact Alan Spinks on 01376 333333 or alan@micromech.co.uk

‘Affordable Automation’

Motion systems project file – March 2013

Micromech Systems provides a comprehensive motion service ranging from just simple modifications to motors and bespoke multi-axis control systems including full installation, commissioning and after sales service.

Year: 2007

Project: Manganese Bath Active Source Handling

Industry or Research faculty: Research for radio active source standards

Client: National Physical Laboratory

Application or solution
A turnkey solution package was required to replace an existing but unreliable system for a new laboratory building installation. The system included: initial sizing and specification, mechanical units (linear actuators, motors, gearheads, and absolute encoders), electrical control (multi-axis), visual basic software screen package, installation, commissioning and training

Scope of overall contract. To design, innovate and justify the system. Then build, write the software program, test the equipment, demonstrate, install, commission and finally train the operators. A user manual was also required.

Description of equipment and services supplied. The Manganese Bath Laboratory at NPL is a facility for processing particular ‘active’ sources by extracting them from a ‘safe’ storage pit location, carrying them by linear motion remotely safely and accurately and depositing them into one of two special spherical chambers, the manganese baths. Once they have been processed they are returned safely to the storage pit. Although the ‘active’ enclosure area can be entered by operators clad in protective suits if necessary, intervention it is not desirable and the main process work needs to be carried out by using remote control arms and programmed routines.

The main motion system comprised of the following: Heavy duty X-Y belt driven servo linear actuators with absolute encoding 4-axis stepper motor driven worm-gear winch units for source extraction from the pit Large linear-actuator stepper/gear driven safety-door for source cell enclosure Dual points of control with HMI operator panels in the active area and outside

Merits of solution provided. To keep costs down and the performance assured Micromech proposed innovative components for all of the main axes. It was necessary to verify the PC screens prior to design completion. The operator training was simple and straightforward.

Note: As a result of the success on this contract, Micromech Systems Ltd were later awarded a new project contract for transferring the active element pellets via a pneumatic pipeline. This involved many hundreds of metre’s around the facility for storage and transfer ‘too and from’ the source cells. As it was not acceptable for an active source to become trapped half way between either destination the system was managed by a safety PLC. This project was also installed by Micromech Systems and was very successful.

Micromech Systems builds motion control systems to customers’ specifications, ranging from simple single-axis applications to complex multi-axis systems. We will design, build, test, and produce application software, install and commission providing a cost-effective trouble-free solution to your motion control issues. Whether the application is a machine upgrade or a new project, Micromech Systems has the answer.

April 2013 project: Beamline upgrade