IDX 7505...the motor doesn't turn...

[Delisle]

I have a IDX 7505 which is supposed to drive a stepper motor ( 24V ; 0.5A)
My application is for slow continuous rotation (it's about a chopper).

First i send these following orders by RS485 :
AA 0
AM 0
AZ 4

Then i send to the "step" a square signal +5V, whose the frequency is about 2 Hz, continuously.

And the motor doesn't move, it's seems a small vibration.

So, i used a scope to see each signal at each phase of the motor coils, and i obtain the two signals below.

I'm suprised because i expected to have two similar périodic signals with a difference of phase PI/2

One of the two signals has a strange shape, i expected a square....it's strange ?
The difference of phase PI/2 seems to be ok, but not hte shape of the signals....
And why the shape of these two signals is not similar ?

Who can help me ?

Does anybody have this kind of trouble ?

If someone has an idea, i would be very interested...

[T. Wendlandt (TRINAMIC)]

Hello Delisle,

is it possible to move the motor by changing the acceleration and velocity as described in "Getting started - step 7"?
If not, please reset the IDX7505 to factory defaults (manual page 27 "5.10 Reset to factory default"), set and save parameters and try again.

For step/direction operation:
Please connect Vcom +5V (e.g. Pin10) and make sure, acceleration is set to "0" (s. "Getting started - step 8")

step signal: square, 2Hz, 5Vpp, 2.5Voffset
As the step frequency of 2Hz is pretty low and as every step signal initiates one µstep, you should only see a very tiny axis movement.

Some explaining scope prints of the shape
- test setup according to desription in "Getting started", direction connected to GND, QSH6018 Trinamic motor, 24VDC power supply
- Parameters: AM 0, AC 10, AZ 4, AW, AA 0

Screen1
Channel1: Phase A+
Channel2: Phase B+

TEK0001.jpg (19.36 KiB) Viewed 654 times

Screen2
Channel1: Phase A+
Channel2: Phase B+

TEK0002.jpg (19.72 KiB) Viewed 654 times

Screen3
Channel1: Phase A+
Channel2: Phase B+

TEK0003.jpg (19.67 KiB) Viewed 654 times

If it still not works, the module seems to be defect. In that case please contact your supplier.


Best regards
T. Wendlandt