Can't move motors with MAX

[mishka]

Hi,

I have a motion control system consisting of T22NRLC motors, P70360 stepper drives, UMI-7772 interface and PCI-7332 motion controller. I configured the drives with P7000 and can move them with that program but not with MAX (see earlier thread entitled Motors move with P7000 but not with MAX).

MAX can communicate with the UMI-7772, and motors can move with P7000, so I assume the problem is either wrong MAX settings, or wrong wiring between UMI and P70360s.

I copied the wiring from an identical set-up down the hall - Is this wiring correct, from UMI to P70360?

pin 4 (step cw) to pin 2 (step-)

pin 12 (dir ccw) to pin 4 (dir-)

pin 6 (enable) to pin 6 (enable-)

pin 7 (fault+) to pin 8(fault-)

pin 14(fault-) to pin 9 (gnd)

pin 15 (iso common) to pin 9 (gnd)

pin 8 (iso power output) to pins 1/3/5/7 (step+/dir+/enable+/fault+)

Thanks

[Vivek_N]

Hi,

As you have been able to move the motors with the P7000 Tools software, it does not look like connectivity is your issue. I think the problem may have to do with your MAX settings. You could take a look at the following knowledgebase article to check if you have configured the axis settings in MAX correctly: http://zone.ni.com/devzone/cda/tut/p/id/3899 . 

I hope this helps. 

[mishka]

Hi Vivek,

Thank you for your quick reply.

I'm not in the lab for a couple days so can't check settings etc, but a quick background question: 

I thought P7000 communicated directly with the P70360 drive boxes, whereas MAX communicates via a more complicated route of PCI-7332 to UMI-7772 to P70360. That's why I thought it was a connectivity issue btwn UMI and p70360s. Is this incorrect?

In any case could you please check the wiring I detailed previously and let me know if it looks okay? I am not confident with it.

Thank you,

Mishka

[Vivek_N]

Hi Mishka,

I will look into this and post again on this thread. Sorry for the delay! 

[Vivek_N]

So, it looks like you should be able to connect the pins from the UMI-7772 to the P70360 in the following configuration:

pin 4 (step cw) to pin 2 (step-)

pin 12 (dir ccw) to pin 4 (dir-)

pin 6 (enable) to pin 6 (enable-)

pin 14 (fault -) to pin 8 (fault -)

pin 7 (fault+) to pin pin 7 (fault+)

External +5V  to pins 3(Dir+) and 5(Enable+) of the P70360

This has not been officially tested out here, however based on the connections present in the P7000 direct connectivity cable, this looks right. Of course, I would recommend getting the P7000 direct connectivity cable as it is made for this purpose.

Hope that helps. 

[mishka]

Thanks Vivek.

I actually do have a cable, it's NI part #198151. It plugs directly into the P70360, but the other end is bare wires that need to be connected to the UMI7772 Control.

I think I should have ordered #198141 - does that plug directly into both units?

Should I order the correct cable, or can the one I have work? If this one will work then which pins on the UMI do I connect to the 6 wires?

The wires are labelled:

STEP (CW)

DIR (CCW)

INHIN

INHOUT

GND

bare silver wire

Thanks again.

[JeffL]

Hi mishka,

The cable you have is intended for the UMI-7764 break-out box UMI. If you have the 7772 or the 7774, then you probably want the 198141-2R5 cable (D-sub to D-sub), yes.