Help connecting servos to breakout board Mach3

[Agathon]

I'm beginning to wish I hadn't started this...

I have Omron R88D-U servo drivers and a R88D-U motor to test it all with. I've connected the motor and the encoder. However, I can't get into the servo driver software as for some reason the OMNUC interface software and the Yaskawa software doesn't like my USB-RS232 port and won't connect with the servo drive.

Anyway, I'd like to try running the servo driver from my BOB using the current settings, but I can't get to the bottom of what I need to connect. It would seem logical that I only need four or five wires to give the driver an enable signal and step and direction pulse, but I'm buggered if I can see exactly what I need to do

Attached are the pin-outs from the driver interface plug.

[Agathon]

Having looked at this a bit more, am I right in thinking that 1 and 3 relate to step and direction on the BOB and that 2 and 4 will be ground? What about enable?

I realise the second page I attached was not relevant.

[Boyan Silyavski]

Did you buy the proper Com cable as i suggested in the other thread? Dig in manual, at the section of initial startup there is said which type of COM cable you need.


Do not run servos using "current settings" . Its like driving blind, or trying to... Just follow the right steps.

[Agathon]

Did you buy the proper Com cable as i suggested in the other thread? Dig in manual, at the section of initial startup there is said which type of COM cable you need.


Do not run servos using "current settings" . Its like driving blind, or trying to... Just follow the right steps.

Thanks for the reply Boyan. Do you mean the computer to driver programming cable (driver to computer) or the driver to BOB? The former is an RS232 DB9, I have the correct plug for the latter (control IO - cn1) - a manufacturers cable wouldn't be any better since I just need to connect the BOB to the correct four or five pins.

Unfortunately, I don't know the "right steps" and can't get my computer to talk to the driver! At the moment, I'm not worried about "flying blind" I just want to prove that the drivers and servo work.

[EddyCurrent]

Anything here ? https://forum.linuxcnc.org/38-genera...wa-servomotors

https://en.industryarena.com/forum/s....php?t=157229&

Have you searched for a generic answer to using servos with Mach3 ?

[m_c]

You really need to know how the drives are set before you can test them.
However a quick look at those pinouts, and if you apply all the required power inputs, activating the RUN pin should at least get the servo to lock, however that depends on the related settings having not been changed from the default where activating the pin enables the servo.

[Agathon]

Anything here ? https://forum.linuxcnc.org/38-genera...wa-servomotors

https://en.industryarena.com/forum/s....php?t=157229&

Have you searched for a generic answer to using servos with Mach3 ?

Many thanks for that Eddy. The first link has already proved useful. I'm chipping away at the problem.