Applied-motion STR2 Manual do Utilizador descarregar pdf (Página 22)

STR2 Hardware Manual

920-0059B

1/30/2014

Step 7: Step Pulse Noise Filter

Just when you thought there couldn’t be any more to know about step signals, we present one

more seing for your consideration. Electrical noise can aect the STEP signal in a negative way,

causing the drive to think that one step pulse is two or more pulses. is results in extra motion

and inaccurate motor and load positioning. To combat this problem, the STR drives include

a digital noise lter on the STEP and DIR inputs. ere are two seings for this lter: 150 kHz

works well for most applications,. If you are operating the STR2 at a high number of steps/rev

and at high motor speeds, you will be commanding the drive at step rates above 150 kHz. In

such cases, you should use the 2 MHz seing as shown below. e step noise lter is controlled

by switch 4 of the small bank of switches.

Your maximum pulse rate will be the highest motor speed times the steps/rev. For example, 40

revs/second at 20,000 steps/rev is 40 x 20,000 = 800 kHz. Please consider this when deciding if

you must increase the lter frequency.

Self Test

If you are having trouble geing your motor to turn, you may want to try the built-in self test.

Anytime switch A1 is moved to the ON position, the drive will automatically rotate the motor

back and forth, 2.5 turns in each direction. is feature can be used to conrm that the motor is

correctly wired, selected and otherwise operational.

OFF

SELF TEST

150

KHZ

2.0

MHZ

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Applied-motion STR2 Manual do Utilizador Página 22