ADLINK Technology PCI-8136 Manual de usuario descargar pdf (Pagina 10)

Dynamic Gantry Error Compensation

Blend Motion Program Download & Multi-Tasking

Position / Velocity / Acceleration vs.Time

Point-Table mixed Motion & I/O Control

Position / Speed Override

Electronic-Gearing

High-Speed Position Comparison & Trigger Output

Gantry control with dynamic error compensation is part of the real-time

feature of the PCI-8254/8258/8253/8256, providing superior control of

large stage movement in TFT/LCD, PCB, and machine tool industries.

To ensure smooth movement along the path, the PCI-8254/8258/8253/8256

incorporate blend motion which looks several points ahead and combines

splining motion for continuous and smooth velocity movement. If more than

one move is specified in succession with no pause in between, the first

movement will blend into the second with the same type of controlled

acceleration as is done to and from a stop.

The PCI-8254/8258/8253/8256 provides point-table moving to execute

continuous motion. Each axis supports more than 5,000 buffers with a

POINT INDEX to monitor the motion and movement status. The point table

also supports mixed motion and I/O operations where the I/O can triggered

by a “motion done” status or motion can be triggered by an I/O input signal.

PCI-8254/8258/8253/8256 allow position / speed change at any time

regardless if motion is accelerating, decelerating or constant. The next

position in the forward or backward direction can be easily and flexibly

overridden.

The PCI-8254/8258/8253/8256 controllers support slaving any axis or axes

to a master. Moving the master axis will cause the slave to move based on the

specified slave ratio. The optimal position of the slave axis is calculated by

multiplying the optimal position of the master by the gearing ratio of the slave.

The PCI-8254/8258/8253/8256 provide higher motion control performance

by a fast encoder input frequency up to 20 MHz and also provide

hardware-based high-speed position comparison and trigger output speed

of up to 1 MHz, ideal for AOI applications.

In the most “Pick & Place” applications, optimized throughput through

an S-curve profile is often required. The S-curve profile eliminates

possible overshooting, otherwise the part could be damaged when it

comes into contact with the substrate. The PCI-8254/8258/8253/8256

provide Scurves with different degrees of smooth velocities.

Positioning backward Change to Higher speed

New speed

Original

speed

Master Axis

Transmission module

Gear

Slave Axis 1 Slave Axis 2

Voltage

Velocity

PID

Trajecto y

Command

PID S

Optimal

synchronizing

controller

1 2 3 4 5 6

CCD

Camera

Trigger Output

In many fabrication applications, interrupted path trajectory can damage

substrates or workpieces, and multiple axes must be managed.

The PCI-8254/58 provide program download and execute up to 8 simultaneous

tasks, while automatically controlling all onboard I/O and generate motion

trajectories, and can even be deployed as a standalone controller.

Task 1 Task 8

IF(P1＞10)M1 1

IF(M1 0 AND M12! 0)M2 1 M3 1

IF(M1 0)P1 P1-1

ELSE P1 P1+1

IF(M11 0)

P1 1000*SIN(P5)

X(P1)

P10 0

ENDIF

IF(P1＜0 OR P2!＜0)

AND(P50 1)

ELSE

P10 1

ENDIF

PXI/PXIe

Modular

Instruments

DAQ

GPIB & Bus

Expansion

Vision

Motion

Control

Real-time

Distributed

I/O

PAC

Remote I/O

Communica-

tions

Fanless

Embedded

Computers

6-10

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