Applied-motion STM23R-2ND Manual de usuario descargar pdf (Pagina 18)

STM23R Hardware Manual

920-0056C

5/5/2015

Conguring the STM23R

Step 1: Seing the Current

To achieve maximum torque, you should set the current to 100%. But under some conditions you may want to

reduce the current to save power or lower motor temperature. is is important if the motor is not mounted to

a surface that will help it dissipate heat or if the ambient temperature is expected to be high.

Step motors produce torque in direct proportion to current, but the amount of heat generated is roughly

proportional to the square of the current. If you operate the motor at 90% of rated current, you’ll get 90% of

the rated torque. But the motor will produce approximately 81% as much heat. At 70% current, the torque is

reduced to 70% and the heating to about 50%.

Two of the small switches on the front of the STM23R are used to set the percent of rated current that will be

applied to the motor: SW1 and SW2. Please set them according to the illustration below.

Step 2: Seing Idle Current

Motor heating and power consumption can also be reduced by lowering the motor current when it is not mov-

ing. e STM23R will automatically lower the motor current when it is idle to either 50% or 90% of the running

current. e 50% idle current seing will lower the holding torque to 50%, which is enough to prevent the load

from moving in most applications. is reduces motor heating by 75%. In some applications, such as those sup-

porting a vertical load, it is necessary to provide a high holding torque. In such cases, the idle current can be set

to 90% as shown.

100%

90%

70%

50%

90%

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 24

Sin comentarios

Applied-motion STM23R-2ND Manual de usuario Pagina 18