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SIPLACE X Edition 09/2005 Appendix 11 – The deviation of position signal of the respec tive Axes are (without any further action) dis- played and analysed on the SA T LCD-Display . The Positioning time is the ’ whole tra…

Edition 09/2005 SIPLACE X

Appendix

20.3.3 Assessing the Axis Dynamic Signal (also for ’Beginner’Mode)

The SIPLACE Axis Tester uses the (signal) option 1 menu as a default for displaying axis dynamic

signals. To reconfigure this setting please refer to Fig. 20.3 - 1, Chapter 20.3.2.1.

Adjusting the

tacho: The ta-

cho signal is di-

rectly

connected

from the servo/

adjustment

board pins to

the oscillo-

scope input.

Assessing the

positioning

quality:

Measuring the

traversing

time/over-

shoots.

Fig. 20.3 - 6 SAT’ operating sequence

The sequence of steps for setting the axis dynamic depends on the operating sequence and con-

nection descriptions for the relevant machine type.

20.3.3.1 Default Terminal Assignment of SAT BNC Outputs for Assessment of Dynamics

– V

nom

. is emitted at the SAT BNC output 1.

– SAT BNC output 2 supplies the nominal current for an AC axis with

Vreg (uncommuted current

signal). However, this is only connected for AC star axes with full digital control. The oscillo-

scope input CH3 can be used for this

Vreg signal. For both DC (Z, DP) and "analog AC"(X,Y)

axes CH3 is free for

actual

servo current signals.

–A

nom

signal (force output at axis controller/at the axis test box) is provided at BNC output 3.

This is the additional acceleration signal for the gantry axes or the force limitation signal for the

Z-axis.

– A connection for the

end signal is provided at SAT BNC output 4. This signal is generally used

as a trigger signal (exeption Z-Axes).

connect SIPLACE Axis Tester SAT to respective Axis

controller board

Boot the SAT and press to activate Main menue

Select 'Machine' (platform)

Selection from: C- / HF- / S- or F- or HS-Machine

HF on top/S-Types/

F-Types/HS-Types at bottom

with cursors up/down

and confirm <-

The menu 'back'(quit) returns

back to the previous menu

HF .

HF/3

HF/4

(F3*) top

F4 / F5 /

F5 HM

(WPC*) bot

(G/S15*)top

S20/

(S23)S25H

M / S27HM

Select Axis type

with cursors up/down or

left/ right and confirm <-

Select menu 'adjust Panel'

to get the Axis dynamic signals of the re-

spect. Axiscontroller to the BNC-connectors

Select 'Positioning quality'

after the first positioning press 'return' <-

to get ...

Select 'Oscilloscope-mode'

Select 'Signal line e.g. 3'

press 'return <-

again and select 'back' up to the new

menu you want

you get the signals at the BNC

outputs and the deviation of position

and time analysis at the SAT screen

For an axis on a different axis controller board -dis-

connect and select the meus described above again

.... get the signals and the deviation

of position at the BNC outputs

with cursors up/down

and confirm <-

* adapter f. Axis c. necessary

to connect SAT easier to the same axis control

ler type this last AC-test menu is saved.

SIPLACE X Edition 09/2005

Appendix

– The deviation of position signal of the respective Axes are (without any further action) dis-

played and analysed on the SAT LCD-Display.

The

Positioning time is the ’whole travel time of a positioning’ (Start signal to End signal).

The

Control time is the time from start to the first arrival at the target position.

The

Pull off Time is the time to control the generated overshoots down to limits.

Positioning time = Control time + Pull OFF time

– With ’Return’ <

, ’Oscilloscope-Mode’, and ’Signal line (2 or) 3’ we connect the deviation of

position signal of the respective Axis to the SAT BNC output. We can measure with the free

Osci-input CH2 (CH3) the deviation of position signal synchronous to the other dynamic sig-

nals.

20.3.3.2 SIPLACE Axis Tester ’SAT’ Display

The diagram in the SAT display

shows a typical overshoot (as in

Fig. 20.3 - 7 at the top) and the

corresponding analysis

times.The delays between posi-

tionings should be set long

enough to allow the values to be

read and assessed.

Confirm with <

and select ’PWM

mode’ and ’dynamic’ to display

the position deviation signal on

the oscilloscope. If no overshoot

occurs during the positioning pro-

cess (see Fig. 20.3 - 7 at the bot-

tom) (asymptotic approach), the

positioning time (pos) and the

control time (CTRL) will be

switched simultaneously. There

is therefore no

’pull off time’

(pull off)

during which the over-

shoot is corrected.

PLEASE NOTE:

The display is automatically

scaled to the overshoot size and

time!

Fig. 20.3 - 7 Times and position devia-

tions for a positioning process with/with-

out overshoot

B1 B2 B3 B4 B5

Edition 09/2005 SIPLACE X

Appendix

Display text components

Samples scans often ’511’ (independent of the scan period setting at ’Time’)

(Closure) Time is the smallest time unit for representation of overshoots (scan period) on the dis-

play. Can be reduced with B1 (display is prolonged and details are enlarged) or increased with B2

(display is shortened and whole picture is visible). Adjustment range 0.1 ms to 5 ms.

Axis type at the display

(Grain) Scale is the pixel grouping of a sample (scan period) or digit on the display. 3 / 14 means

that scanning - the time unit entered at Time - will always appear on the screen with a length of 3

(fixed) pixels. A digit position deviation is 14 (dynamic) pixels in this case.

Scope the extent of a maximum positive or negative overshoot

(Time) Range is the signal duration as seen on the screen (alters in line with the ’Time’ setting).

Overshoot!! This is the Position of the axis at the moment of the End signal!

This show you how many Digit has the axis to move after End signal to get really

in target position.

Below the signal you will see a combination of numbers from which one can see at which part

of the overshoot scan the display begins

)

(e.g.

250/511 250th scan overshoot of 511

total scans (pos. 511 = pos.0)

Pull off time is the time measured for the

axis controller to correct the overshoot(s).

Ctrl. Control time is the time needed by

the axis to reach the target position for the

first time. (1)

Pos. Positioning time is the time from axis

start to issuance of the end signal at target

position achievement with reliable position

deviation. Add (1) and (2).

20.3.3.3 Positioning Time Submenus

More specific analyses of the positioning sequence can be performed with the aid of these menus.

After recording a positioning procedure, press <-

Return to open the submenu.

(PWM mode version 1.0) Oscilloscope mode:

The version 1 designation stems from the pulse amplitude modulation used for the representation

of overshoots. It is switched synchronously to the other position deviation signals for the SAT over-

shoot counter, on the oscilloscope.

Start FFT:

The swivel-in process for a particular position can be analyzed with the aid of a frequency spec-

trum. After a positioning procedure, select ’FFT’ (Fast FourierTransformation) to display the

swivel-in spectrum on the screen.

Start Plot:

This menu facilitates measurement of the position deviation signal on the SAT screen, similar to