Applied-motion STR4 Manual do Utilizador descarregar pdf (Página 23)

STR4/8 Hardware Manual

920-0030J

5/12/2015

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. e default factory seing of this lter is150 kHz,

which works well for most applications.

However, as discussed in Step 5, if you are operating the STR 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 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 frequency.

1-2: 2 Mhz 1-3: 150 Mhz

S4 Jumper seings

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 45 46

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Applied-motion STR4 Manual do Utilizador Página 23