Bimba OLE Manual de usuario descargar pdf (Pagina 16)

k. Set step pulse type

Most indexers and motion controllers provide motion commands in the “Step

and Direction” format. The Step signal pulses once for each motor step and

the direction signal commands direction. However, a few PLCs use a differ-

ent type of command signal: one signal pulses once for each desired step in

the clockwise direction (called STEP CW), while a second signal pulses for

counterclockwise motion (STEP CCW). The drives can accept this type of

signal if you remove the cover and move jumper S3 from the “1-2” position to

the “1-3” position. Factory default is the 1-2 position. As you can see in the

image, the jumper terminals (2, 1, 3) and S3 and S4 designators are printed

in white on the circuit board.

l. Step pulse noise lter

Electrical noise can cause the drive to think that one step pulse is two or

more pulses, resulting in extra motion and inaccurate motor and load posi-

tioning. To combat this problem, the drive includes a digital noise lter on the

STEP and DIR inputs. The default factory setting of this lter is 150 kHz.

If you are operating the drive at high speeds with step rates above 150 kHz,

remove the cover and move jumper S4 from the 150 kHz position (1-3) to the

2 MHz position (1-2) as shown below.

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 fre-

quency.

Jumper S4: noise lter

Shown in 1-2 position

Jumper S3: step pulse type

Shown in 1-2 position

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 22

Sin comentarios

Bimba OLE Manual de usuario Pagina 16