Linear actuators, rotary tables and XY tables for your motion automation task

 

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Linear

Motors

Linear

Actuators

Rotary

Tables 

XY

stages

Feedback

systems

Electronics

 
             

 

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Linear Brushless Motors                                                                                  Find your linear motor here

servo motors

unlimited travel

iron core

 low cog

LinServ

linear motor

Linear motors

brush-less servo

Iron core low cog

Series LC

 

servo motors

unlimited travel

iron core

low cog

 dual magnet design

no bearing preload

LinServ

 

linear motor

Linear motors

brush-less servo

Iron core dual magnet track

 

Series DM

Linear Actuators                                                                                                                 Find your linear actuator here

 

 

direct linear servo drive

integrated bearing

precision feedback

high speed

cabling system

"plug-&-play"

LinServ

 

linear actuators

 

 

Linear Actuators

linear servo motor

turn-key solution

Linear ServoSlideTM

direct linear servo drive

integrated bearing

precision feedback

long stroke

"plug-&-play"

LinServ

linear actuator

 

Elevator Stages

linear servo motor

turn-key solution

 

Elevator Stage

 

 

 

direct linear stepper drive

 air bearings

LinStep

 

linear actuators

Lift (Z) axis

linear stepper motor

with air bearings

Series Z

 

direct linear servo drive

integrated bearing

linear feedback

high cycle rate

"plug-&-play"

LinServ

 

 

Linear Actuators

linear servo motor

push-pull rod design

 

I-ThrustTM

 

 

motorized screw

integrated bearing

high resolution

"plug-&-play"

 

 

Linear Actuators

Motorized screw

contact factory

 

M-ThrustTM

 

 

direct linear servo drive

integrated bearing

precision feedback

high acceleration

position/force controls

LinServ

 

Linear Actuators

linear servo motor

position/force controls

I-ForceTM

 

direct linear stepper drive

roller bearings

air bearings

LinStep

 

 

Linear Actuators

linear stepper motor

with ball and air bearings

Series BB

 

direct linear stepper drive

closed loop operation

Linear ServoStep

 

 

Linear Actuators

linear stepper motor

position feedback

 

 

Linear ServoStepTM

Rotary Tables                                                                                                                             Find your rotary table here

 

motorized stages

compact design

integrated bearing

center aperture

small size

 

 

Motorized Rotary stages

very compact design

contact factory

 

Series RTHM

motorized stages

compact design

integrated bearing

large center aperture

small size

 

Motorized Alignment

Rotary stages

compact design

limited rotation angle

contact factory

 

 

Series RTHM-Align

 

direct Z-Theta drive

integrated stage

air bearings

LinStep

rotary table

 

Z-Theta system

air bearings

 

 

Series ZT

 

direct drive

air bearings

very low profile

center aperture

RotoLinear

rotary tables

 

Rotary Tables

low profile

Series RTH

 

direct drive

air bearings

low profile

large open center

RotoLinear

rotary tables

 

Rotary Tables

large open center

 

RotoRingTM

 

direct drive

integrated bearing

precision feedback

center aperture

medium load capacity

high torque

RotoServ

rotary table

Rotary Tables

medium load capacity

 

ServoRingTM

 

direct drive

integrated bearing

precision feedback

center aperture

heavy load capacity

high torque

RotoServ

rotary table

Rotary Tables

heavy load capacity

 

 

ServoRingTM

 

direct servo drive

integrated  dual bearing

precision feedback

large center aperture

low profile

high speed

 

rotary table

Rotary Tables

  large aperture

high speed

 

AccuRingTM

 

direct servo drive

integrated bearing

precision feedback

center aperture

low profile

high speed

RotoServ

rotary table

 

Planar Rotary Tables

low profile

high speed

 

 

Planar ServoRingTM

XY systems                                                                                                                                      Find your XY table here

 

direct drive

single plane XY stage

multiple forcers

air bearings

lightweight construction

large travel area

PlaneStep

xy tables

Planar systems

XY table

Single plane

Planar XY

 

direct servo drive

robotic  arms

XYZ configurations

linear motors

LinServ

xy tables

XYZ Robotic Arms

XY table with

Linear Servo Slides

 

Robotic XY

 

direct servo drive

large area travel

XYZ system

linear motors

LinServ

xy table

 

Gantry Systems

XY table

large area travel

 

 

Gantry XY

direct servo drive

XY table with Theta stage

large center aperture

closed loop operation

xy table

 

X-Y-Theta workcells

XY table with

open frame

 

 

Open frame XY

 

Feedback Systems                                              Find your encoder here

linear feedback

tape-less system

single and XY system

linear encoder

 

Linear feedback 

for linear stepping motors

 

IntelLiCoderTM

 

open tape system

sub-micron resolution

feedback for servo motors

built-in interpolation

linear encoder

 

Linear encoders  

open tape system

 

enclosed system

small profile

feedback for servo motors

hi-accuracy

built-in interpolation

linear encoder

 

Linear encoders  

enclosed system

large open center

small profile

hi-accuracy

measures through 360

linear encoder

Ring encoders  

large open center

 

1-3 axes

relative/absolute position

linear/rotary compatible

index position capture

PC interface

linear encoder

Encoder digital readouts  

1 to 3 axes

Control Electronics
 

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credit card size

hi-res micro-stepping

closed loop ServoStep

40VDC/3Аmp

motion controller

Smart drives and indexers

PCB

I-DrivesTM

 

panel mount

hi-res micro-stepping

closed loop ServoStep

80VDC/6Аmp

motion controller

Smart drives and indexers

panel mount

I-DrivesTM

 

RS-232 network

stand-alone indexer

hi-res micro-stepping

PLC interface

110/220AC

servo drive

Programmable standalone

Networked indexers

I-StepTM

 

CAN network

stand-alone indexer

closed loop servo controls

sinusoidal commutation

PLC interface

110/220AC

servo drive

Brushless servo amplifiers

Networked indexers

I-ServTM

 

multi-axes controller (1-8)

closed loop servo controls

micro-stepping controls

Ethernet network

PCI, ISA, VME, PC104

servo drive

Multi-axes motion controllers

 

         

 
 

Last update 05/29/2010

Linear actuators, rotary tables and XY tables for your motion automation task

 
 
 
 
 
 

Benefits of a Rotary Table

A rotary table is a precision device that is ideal for work positioning. Such table is used in metal works as it makes the job of drilling easier for the metal worker. Other than this, the metal worker can also cut the piece on fixed axes during specific interval with the help of a rotary table.

 

Rotary tables are available in varieties. Some of these tables use indexing plates for operations related to indexing whereas, others enables the user to fit dividing tables and leads to a better work positioning.

 

What make rotary tables important for metal industry are its numerous uses. Here is a list of few:

 

 -- Rotary tables are used for machining spanner flats on bolts

-- For cutting round pieces

 -- For drilling holes at equal distance on circular flanges

-- A metal worker can also create large diameter holes on milling machines with these tables

 

There are different parts and components in rotary tables and all have different functions. Work table is the most important part of the table. It has spherical working area with four t-slots, which are used for mounting work pieces. There is a clank handle on rotary tables that enables the user to rotate the tables in clockwise and anti-clockwise directions.

Rotary tables also have two bases, one is meant for vertical rotation whereas the other one is meant for horizontal rotation.

At times, rotary tables are also mounted flat on planes similar to the way cutters are placed on vertical milling machines.

If we look closely, rotary tables play a crucial role in the metal industry. Because they are used to perform different jobs, there is a specialized variety of rotary table to meet industry specific needs.

 

Functioning of Rotary Tables

Rotary table is a work positioning device that has got high usage in metal working as it enables the metal worker to cut or drill the piece at exact intervals. There are some rotary tables that also enable the worker to perform indexing operations while the others can be fitted with dividing plates for work positioning.

Rotary Tables are mounted flat on the tables that are rotating around vertical axis in the plane of the vertical milling machine. There is also an alternate setup where tables are mounted on the ends of machine for rotating around horizontal axis.

When the table is mounted on a secondary table, the work piece lies at the center around the axis of the table that is centered around the axis of the cutting tool. All these three axis lie in coaxial form. In order to set the cutter at the desired distance from the center of the work piece, the secondary table is offset in X or Y direction. This will result the worker to perform concentric machining operation on the work piece. If you want to cut more complex curves, it is suggested to place the work piece eccentrically at a fix distance from the center.

If you are setting the table on vertical mill, you can either drill concentric or equidistant holes as well as cut semicircular shapes & contours.

If we list the benefits and uses of rotary tables, they are used:

         For machining spanner flats on bolt.

         For drilling equidistant holes on the circular flange.

         For cutting round pieces with protruding tang.

         For creating large diameter holes on small milling machines through following a circular toolpath.

         For milling helixes.

         For cutting difficult curves.

         For cutting straight lines.

         For cutting arcs.

A rotary table has a solid base so that it can be clamped onto another fixture or table. These tables have an important usage in the metal work industry because of numerous functionalities.

 

Buying Tips for Rotary Table

A rotary table is used in precision metalworking industry. It is made of a solid base that can be clamped on to the other fixture. In simple words, rotary tables are discs, which rotate freely or by using a worm drive with a motor.

 

Rotary tables are used in different applications like machining, assembly and automation. Other than this, these tables find usage in assembly and equipment positioning. When you are buying a table, there are a few things to consider. These include:

 

Diameter of the Table

The worktable diameter is the surface area of the rotary table.

 

Measurement of Through-Hole Diameter

It is the diameter of the breadth of the hole present at the center of the workstation.

 

Maximum Radial Load

When the load is pushed against the table, the heaviest amount it can support on vertical or horizontal axis is the maximum radial load.

 

Maximum Axial Load of the Table

Maximum weight tables are able to bear at the time of concentric operations.

 

Table Rotation Speed

Maximum rotation speed set b the manufacturer.

 

Minimum Indexing Increment

Smallest angle setting on the table.

 

Rotary tables can be mounted in horizontal, inverted or vertical styles. When the table is mounted horizontally, it is in a flat, horizontal and upright position. In vertical mounting, surface of the table runs up and down. When it is inverted, the table is upside down in a horizontal angle.

The location of drive on rotary table depends on the mount. You can place the drives below, behind, on the top or on the side of the table. When the drive is mounted horizontally, it is located above the surface of the table. When the table is mounted horizontally, the side-mounted drive is placed to the side of the surface of the table.

 

The rotary table can be driven manually, pneumatically, hydraulically and electrically. If you are driving manually, the table should be loosened and it must be turned manually with the crank.

 
 

Components and Uses of Rotary Tables

 

Rotary table enables the process of drilling holes on a drilling rig by providing rotational force to the string of the drill. It is a precision work positioning devices that is used in metalworking. With such a table, an operator can cut or drill the work around a fixed axis. Here are the components of a rotary tables:

Rotary Locks

Almost all the rotary tables have rotary lock. The lock prevents the table from turning in one direction or from turning at all. This component is mostly used as an alternative of using a second pair of tongs for breaking out or making the pipe.

Chain Drive

Most of the rotary actuators are operated by chain. These chains are similar to the large bicycle chains and you need to constantly oil them to prevent from jamming or burning.

Bushings

Bushings are present at the center of the tables and can be removed in two separate pieces. The large gap in the rotary bushing center is called bowl. In bowl, slips are set for holding the drill string when the pipe and connections trips. These bushings connect to the Kelly bushings for inducing the spin which is required for drilling.

Most of the rotary tables are nowadays no coming with rotary drives. Instead, they have top drive technology where the drill string is moved by mechanism located at the Kelly.

There are some rotary drives that use index plates for the purpose of indexing, whereas, others come with dividing plates. These plates lead to the regular work positioning at divisions where indexing plates cannot be used. Rotary actuators are used for machining spanner flats on bolt, for drilling equidistant holes on circular flanges, cutting round pieces as well as for creating large diameter-holes which small milling machines fail to do.

 

Mounting of the rotary table

 

How to mount rotary tables to maximize performance. Various ways to mount rotary table.

 

Rotary indexing tables have demand in metalwork industry because they are accurate labor locating tools. An operator can disjoint the piece or pierce through it within a determined axis with the help of a rotary stage.

There are a few rotary CNC tables that enable the utilization of index platters for indexing maneuvers whereas others can be added with dividing plates for assignment arrangement within junctions.

Mounting of Rotary Tables

These tables are mounted in a flat manner so that tables are positioned in revolving way around the perpendicular alignment. This kind of job is done on the rotary dial table, while keeping a steady plane perpendicular to milling machine. There is one more optional arrangement for rotary index tables, where they are mounted at a right angle plate so that they can be revolved on a parallel axis. You can also use tail-stocks in this arrangement to securely place rotary tables work pieces at the center.

In case you are mounting the table on a resulting table, the workstation will be centered in the circumference of the alignment. The axis of the table will fall in the middle of the axis of the cutting apparatus. In this way, all the three alignments will be coaxial and will share familiar axis.

Other than positioning the machine spanner flats on bolt, you can use rotary tables to make holes on the top of a spherical projection at equal distances. One of the amazing functions of these tables is making big diameter punctures with the help of a round tool path.

Rotary Tables when coupled with CNC milling machine work as stepper motors. These tables accept multiple components that are included in a mill and also remove the need for lathe machines. It is because of multiple advantages of rotary tables, they are important in metal work industry.

 

Direct Drive Rotary Table Construction

 

Torque motors are also called "frameless" motors. They don't have housings, bearings, or feedback devices. In this sense the motor is a kit and meant to be part of the machine structure. Torque motors are designed as direct drives. They eliminate the need for gearboxes, worm-gear drives, and other mechanical transmission elements and directly couple the payload to the drive. This makes rotary drives with high dynamic responses and no hysteresis possible. The large inner diameter of a torque motor is a big advantage in machine tool design. Large hollow shaft allows designers to design rotary table to support bearings, feedback devices and payloads.

Torque motors are available in a wide range of sizes, with diameters from smaller than 100 mm to larger than 1 m. Motor diameter is similar to frame size for conventional brush-less servomotors. And for a given diameter, several axial lengths are available.

Torque motors have a large number of magnetic pole-pairs with many permanent magnets on the rotor. Torque motors can be built as thin rings. They have smooth velocity modulation with low ripple. Eddy-current losses in torque motors constrains the maximum practical number of pole pairs and speed. As a result, torque motors are primarily designed for low/mid-speed range applications, generally below 1,000 rpm.

Torque motors produce high torque at stall and can have high dynamic stiffness. However, the motor alone does not determine dynamic stiffness or precision. To exploit the full benefits of direct-drive, an integrated rotary table must also contain precision feedback device and high stiffness bearing to provide a high-performance rotary stage.

rotary stage = rotary tables + rotary stage + rotary tables

High-precision, high-resolution feedback is essential for optimal performance of rotary tables. Because loads are directly coupled to the drives, higher accuracy is possible. Rotary table positioning resolution is also in direct relation to the feedback's resolution, so it takes an encoder with a high line count and a high resolution interpolation factor. System resolution below 1 arc-sec is achievable in direct drive rotary stages..

An important difference between direct-drive rotary tables and those driven by conventional dc servomotors and gearboxes is that torque motors are found inside the rotary table axis and are part of the machine. Most of torque motors include provision for liquid cooling which effectively increases the continuous torque rating of the motor and higher power rating of the rotary table. Air cooling, while an option, is much less effective than liquid-based cooling.

A torque motor is only one element in a complete rotary stage. It still needs a mechanical structure with high rigidity and precision bearings. It is an overall integration of these elements that determines complete rotary stage performance.