IAI America ERC2 User Manual

Page 93

5. Explanation of Operating Functions

5.3.11 Power-Saving Mode at Standby Positions

One general feature of pulse motors is that their holding current is greater than AC servo motors in a standstill

state.

Therefore, we provide a power-saving mode to reduce power consumption in situations where the actuator

remains standstill for a long period at a standby position.

Use this function after confirming that it will not present problems to any part of your system.

Specifically, the full servo control mode can be selected for saving power in the following three conditions:

(1)

When the actuator stands by with the servo on after the power has been turned on (before home

return is completed)

(2)

When the actuator stands by after the home return operation effected by the HOME input signal

has completed

(3)

When the actuator stands by after reaching the target position

Set “0” or “4” in parameter No. 53.

Setting

Disable power-saving mode (complete stop)

Full servo control mode

The pulse motor is servo-controlled to reduce the holding current.

Although the exact degree of current reduction varies depending on the actuator model, load condition, etc., the

holding current decreases to approx. one-half to one-fourth.

Since the servo remains on, no position deviation occurs.

The actual holding current can be checked in the current monitor screen of the PC software.

Take note that micro-vibration or noise may occur in certain conditions where external force is applied, or

depending on the position where the actuator has stopped.

If micro-vibration or noise presents problem, do not use this mode.

Caution: In push & hold operation, the full servo control mode becomes ineffective once the

operation has completed successfully. If the actuator has missed the work part, the full

servo control mode becomes effective.