DRIVES, CONTROLS & MOTORS  PRODUCTS & APPLICATIONS IMPROVING THE PRODUCTIVITY OF AUTOMATED WINDING MACHINES


Leicht Stanzautomation has specified seven of STOBER’s SI6 series drive controllers for its latest generation of automated winding machines. The SI6 has been installed into the newest ASW series automated multiple winders and is said to be key to their cost effective productivity. With the new winding machines the


system changes the reels automatically. After components are punched the machine automatically winds them in a few minutes. The reels are driven by coaxial synchronous servo geared motors and it takes barely two seconds to change from reel to reel with a planetary gear unit. Another space-saving right-angle gear unit handles the precise feeding of the strip. To ensure complete reliability, STOBER’s STO


(Safe Torque Off) and SS1 (Safe Stop 1) functions are integrated within the Leicht systems. In the SI6 series, these are certified in accordance with


EN 13849-1 and can be used without function tests that interrupt production. “The drive controller has a width of only


45mm and is designed as a multi-axis drive controller,” commented STOBER representative Markus Stolowski. “A single SI6 drive controller can control up to two axes. Thanks to the multi-axis drive design, the number of axes to be controlled can be scaled without limit.” Installing individual STOBER components


is easy, the company explains. The patented Quick DC-Link modules were simply clicked into the standard copper rails for power distribution, which enables the simple installation and connection of the drive controllers. The electronic geared motor nameplate is


available with the HEIDENHAIN EnDat 2.2 encoder system and easily and reliably handles parameterisation of the motor and gear unit data. The individual devices are


connected to the central PS6 supply module. As a result, there is no need for decentralised supply modules or fuses and cabling for each axis, saving space within the control cabinet. Of additional benefit, the ASW is easily accessible, and the user can conveniently operate the system using a ten-inch display. The SI6 drive controller is a


modular and scalable rack system


with multiple axes. The double axis module, which provides 2 x 5 amps, is just 45mm wide yet delivers a position, speed and current cycle time of only 62,5µs. It is available with integrated EtherCAT and PROFINET communication as well various safety options including FSoE (Safety over EtherCAT). The SI6 can control rotary synchronous servo motors and asynchronous motors, as well as torque motors. It will also work with HIPERFACE DSL one cable encoder systems. With five sizes and with two power options, the STOBER SI6 saves both space and energy, and is so compact that a 20 axis system occupies a space of just 495mm. Leicht has integrated STOBER’s patented


Quick DC-Link system using one bus voltage, which means that energy generated from one drive can be harnessed by the other modules.


STOBER T: 01543 458858


GEARED MOTOR SERIES NOW OFFERS TORQUE RANGE FROM 50 TO 18,000NM


The WG20 – the first geared motor range to be entirely developed in-house at WEG – now has a torque range from 50 to 18,000Nm. This, the company explains, will allow more industries and applications to benefit from the gearbox. The new product is available in helical geared, parallel shaft geared and


helical bevel geared versions, to alter the speed and torque of any motor. Designed to the standard industry footprint, the WG20 gearbox can easily be retrofitted without adjustment to peripheral equipment. According to the company, carrying out assembly in-house means


it can produce the gearboxes to the highest quality and at a cost- competitive price, while ensuring shorter lead times.


WEG www.weg.net REPAIR SERVICE GETS BRICK MANUFACTURER BACK IN GEAR


The brick crusher at one of the UK’s largest brick manufacturers consisted of a conventional gearbox with a specialist crusher frame featuring a pair of contra-rotating shafts clad with picks. When functioning correctly, material is fed into the in-running gap and is broken down into smaller pieces. The gearbox drives the lead shaft and two spur gears synchronise the pair sharing the power. Called on to bring their gearbox expertise to the


repair and refurbishment of the brick crusher, Dana’s servicing team examined the unit and found that the driven crusher shaft had lost the splined interface with its timing gear. The shaft itself is a large piece


/ DESIGNSOLUTIONS


of steel with a lot of machined features and would be expensive to replace. So, Dana decided on a keyed fit with three keys at 120˚ and an interference fit. The timing gears were worn, but the company was able to take the secondary item and turn it to its better flank and reuse it. The replacement for the scrapped item was made to suit the centre distance and modified to limit the backlash that would be caused by wearing it in with its mate. The whole interface between the output shaft and the crusher was badly worn, requiring re-boring and new oversize bearing cassettes to the driven end of the crusher frame. For this project, the engineers focused on minimising disruption


and reusing parts where possible. Dana SAC UK


www.danasac.co.uk DESIGN SOLUTIONS | MARCH 2020 17


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