Elmomc SimplIQ Analog Servo Amplifiers-Violin Operating M Manuel d'utilisateur télécharger pdf (Page 17)

VIO-Velocity - Operating Manual Rev 09/09. Elmo Motion Control

Page 13

Operation of the Servo Control

3.1 Command

The user can change the default scale of the differential input (±10.0V) by calculating and inserting R5 &

R6 into the designated solderless terminals. The value of theses resistors is given by:

KohmsVRR MAXIN

)(*5.265

The factory default values of R5 and R6 are 25Kohms. This value is for ±10V command input.

Care must be taken not to apply input voltage above the maximum input voltage as this will cause the input

op amp to operate beyond its limits and in extreme cases may even damage the op amp. The maximium

voltage is calculated by:

8.0*)(5)( KohmsRV MAXIN

3.2 CFM

The amplifier is equipped with Current Feedback Multiplier (CFM). By switching S2 to the ON position the

signal of the current feedback is multiplied by 2 and consequently the following changes occur:

• Current gains are divided by 2.

• Current monitor is multiplied by 2.

• Current limits are divided by 2.

This function should be activated whenever the rated current AND the peak current of the motor are less

than 50% of the amplifier rated continuous and peak limits respectively.

Cont.

Current limit

Peak Current

limit

Current

Gain (A/V)

Current

monitor

(V/A)

With no CFM Ic Ip Ip/4 5/Ip

With CFM Ic/2 Ip/2 Ip/8 10/Ip

Table 7: CFM effects

The default (S2 Off) is normal current feedback.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 34 35

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Elmomc SimplIQ Analog Servo Amplifiers-Violin Operating M Manuel d'utilisateur Page 17