lehmann rotary table pdf manufacturer

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* pL SOLUTIONS Shanghai Co. Ltd is part of a network of locally owned, independent representatives and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS India/SEAis part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS Italia is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS Japan is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS USAis part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS India/SEA is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS USA is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS India/SEAis part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS South Korea is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS India/SEA is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS USAis part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS India/SEAis part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

The Lehmann product line also offers a wide range of workpiece clamping options, including options for fully automatic loading and unloading by robots. The comprehensive range is divided into geared and direct drive rotary tables and offers numerous possibilities thanks to the use of a flexible modular system.

Making a MACH 2022 debut, on the pL Lehmann stand will be the company’s advanced 900 series. The powerful new range of versatile, direct drive rotary tables are particularly suitable for HSC milling, mill-turn machining, modern hobbing (power skiving) or even demanding grinding operations.

The tables are able to transform simple 3-axis milling centres into multi-functional 5-axis machines. The 900 DD series’ durable housing is fully sealed to IP 67 and able to withstand rotations of over 2,000rpm without a problem.

In response to situations such as emergency stops or power failures, a specially developed 900 DD fail safe system brakes the spindle to zero within a very short time without damaging the rotary table.

pL LEHMANN has developed a rotary table program optimized for measurement technology – the MQ series. The Swiss manufacturer offers two distinctly different models, the "Q-Line" and the "M-Line". While the "Q-Line" can be retrofitted to almost any measuring device at any time and automated if required, the "M-Line" is available from the measuring machine manufacturer (OEM) as a fully integrated model.

The Q-Line is ideal for stand-alone use. It is suitable for both new and retrofit equipment of coordinate measuring machines (CMM), for example, from all established manufacturers and also of other measuring devices (for roundness, contour, surface...), which it transforms into versatile measuring stations.

As an entry-level model – suitable for simple applications on the shop floor or in measurement laboratory – pL LEHMANN offers the manual, super-flexible rotary table MA-508.m Q. It can be combined with height, contour, and surface measuring devices and is recommended for run-out test equipment and coordinate measuring machines. Users can set different ratios to fast or slow in just a few steps. A smooth-running, sensitive handwheel makes it possible to approach any position very precisely and unerringly. A fold-out digital display shows the angular position with a resolution of 0.001°.

pL Q-Line rotary tables are optionally available in a housing made of aluminum (e.g. for transmitted light systems) or of spheroidal graphite iron (e.g. for CMMs). In addition, each unit is equipped with an emergency stop switch to meet the high safety requirements.

For more than 40 years, the Swiss company pL LEHMANN has been building compact, high precision CNC rotary tables. The powerful design offers many special features, like a built-in booster for spindle clamp, an internal monitoring system which checks all vital functions, including Bluetooth accessibility for remote service. The product line also offers a wide variety of workpiece clamping options, including options for fully automated robot loading and unloading. New: “direct drive” rotary axis for Millturn functions.

With innovative CNC rotary tables, organized in a standard modular system, the company strives to meet the international needs for economical production of very small to medium-sized workpieces in the machining industry by satisfying individual requirements with appropriate combinations.

Complicated workpiece geometries require multiple and flexible workpiece clamping and motions in the machine compartment. Based on a high level of standardization, pL LEHMANN is able to offer an appropriate and economical solution for the most varied of applications. Short setup times increase productivity and the degree of utilization. At the same time, the user has the ability to automate one step at a time: e.g. starting with manual loading, progressing to simple linear feed systems and ultimately to fully automated production with robots. With interfaces for different clamping systems, supplemented with the appropriate clamping cylinders and rotary unions and possibly even stroke and pressure monitoring, a wide range of modules is available.

Over the course of a month, Pequot can run between 600 and 800 active jobs with lot sizes ranging from a couple of parts to thousands of parts. Recently, though, the shop was experiencing poor part surface finishes and inconsistent tolerances on VMCs with rotary tables to enable four-axis machining, two problems that would randomly and inexplicably occur from one batch of parts to the next and sometimes even during the same part run. Pequot would set up a job and run some parts that would be machined to specification. Then, out of the blue, a part would come off the machine out of tolerance or with chatter marks on its surface finish, and tool life would suddenly take a nosedive.

Pequot evaluated all aspects of its process to determine the cause of these problems, including the machine tools, toolholders, cutting tools, workholding devices and part programs. Eventually, the shop realized inconsistent rotary table positioning was the culprit, even though initial inspections of those tables seemed to reveal they were operating properly.

“The inconsistency hindered us from immediately tracing the cause back to the rotary tables,” explains Kevin Spielman, Pequot’s production manager. “When experiencing such a hiccup, we would adjust machining speeds and feeds to compensate, and get a few good parts. Then, unbeknownst to us, the tables would operate correctly, but we’d be running at the wrong machining parameters. This, in turn, also produced bad parts. After a while, we were constantly chasing our tails and second-guessing ourselves when it came to adjusting operational parameters.”

This spurred the shop to replace the tables with pL Lehmann EA510 and EA511 single-spindle units from Exsys/Eppinger. These rotary tables, acquired from local Exsys distributor Hill Industrial Tools, give the shop’s three-axis VMCs more reliable fourth-axis capabilities for part positioning and rotational machining.

“Once we installed the pL Lehmann tables, our inconsistency and rigidity problems vanished,” Mr. Spielman says. “We experienced immediate and further improvements in accuracy, tool life, machining speeds and material removal rates to the point that we reduced part machining cycle times by 25 percent. Plus, we basically eliminated any machine downtime associated with our previous rotary tables. Most importantly, the new tables have increased our machine utilization. We now have the confidence and ability to run our automated milling machines nonstop for lights-out production over night and on weekends.”

Despite their compact design, the pL Lehmann tables are said to offer strong resistance to pullout torque and axial force while providing high levels of clamping torque. In addition, their backlash-free, preloaded gear drive (PGD) technology is said to deliver the high torque common to gear-driven tables and the high rotational speeds common to direct-drive tables, with spindles capable of speeds ranging from 47 to 111 rpm and 90-degree moves in 0.34 second.

The spindles on the standard-model tables are guaranteed to within 5 microns of runout (less than 3 microns for the high-accuracy models). The tables’ ±1 arc-second positioning capability, along with near-zero runout, makes them well-suited for Pequot’s demanding tight-tolerance applications. Steel parts machined on the pL Lehmann tables typically measure approximately 1.125 inches in diameter and 8 inches long; aluminum parts are commonly 5 inches in diameter and 6 inches long.

Mr. Goerges says that with the increasing business Pequot is winning, its goal is to get the most production out of its manufacturing equipment. Automation plays a key role. In fact, the shop refers to this goal as “168,” referring to the number of available hours in one work week. “With the new rotary tables, we’ve increased our machine output and won back massive amounts of production time on our automated VMCs,” he says.